./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- 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-6b4ec56 [2022-11-20 10:55:37,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:55:37,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:55:37,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:55:37,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:55:37,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:55:37,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:55:37,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:55:37,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:55:37,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:55:37,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:55:37,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:55:37,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:55:37,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:55:37,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:55:37,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:55:37,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:55:37,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:55:37,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:55:37,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:55:37,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:55:37,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:55:37,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:55:37,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:55:37,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:55:37,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:55:37,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:55:37,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:55:37,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:55:37,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:55:37,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:55:37,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:55:37,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:55:37,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:55:37,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:55:37,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:55:37,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:55:37,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:55:37,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:55:37,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:55:37,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:55:37,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:55:37,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:55:37,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:55:37,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:55:37,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:55:37,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:55:37,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:55:37,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:55:37,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:55:37,484 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:55:37,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:55:37,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:55:37,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:55:37,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:55:37,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:55:37,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:55:37,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:55:37,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:55:37,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:55:37,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:55:37,487 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:55:37,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:55:37,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:55:37,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:55:37,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:55:37,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:55:37,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:55:37,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:55:37,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:55:37,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:55:37,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:55:37,490 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:55:37,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:55:37,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:55:37,491 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_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2022-11-20 10:55:37,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:55:37,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:55:37,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:55:37,866 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:55:37,867 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:55:37,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-20 10:55:40,843 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:55:41,066 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:55:41,067 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-20 10:55:41,079 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/data/c5b1628d0/0688d23d7cc2471e91e979357b08624c/FLAG159e334c0 [2022-11-20 10:55:41,093 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/data/c5b1628d0/0688d23d7cc2471e91e979357b08624c [2022-11-20 10:55:41,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:55:41,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:55:41,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:55:41,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:55:41,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:55:41,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e9f4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41, skipping insertion in model container [2022-11-20 10:55:41,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:55:41,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:55:41,347 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-20 10:55:41,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:55:41,368 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:55:41,408 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-20 10:55:41,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:55:41,426 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:55:41,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41 WrapperNode [2022-11-20 10:55:41,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:55:41,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:55:41,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:55:41,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:55:41,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,473 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 336 [2022-11-20 10:55:41,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:55:41,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:55:41,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:55:41,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:55:41,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:55:41,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:55:41,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:55:41,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:55:41,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (1/1) ... [2022-11-20 10:55:41,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:55:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:41,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:55:41,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:55:41,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:55:41,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:55:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:55:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:55:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:55:41,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:55:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:55:41,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:55:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:55:41,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:55:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:55:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:55:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:55:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:55:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:55:41,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:55:41,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:55:41,619 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:55:41,755 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:55:41,757 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:55:42,416 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:55:42,665 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:55:42,668 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 10:55:42,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:55:42 BoogieIcfgContainer [2022-11-20 10:55:42,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:55:42,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:55:42,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:55:42,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:55:42,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:55:41" (1/3) ... [2022-11-20 10:55:42,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f462820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:55:42, skipping insertion in model container [2022-11-20 10:55:42,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:41" (2/3) ... [2022-11-20 10:55:42,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f462820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:55:42, skipping insertion in model container [2022-11-20 10:55:42,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:55:42" (3/3) ... [2022-11-20 10:55:42,687 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2022-11-20 10:55:42,696 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:55:42,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:55:42,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:55:42,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:55:42,799 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:55:42,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 273 transitions, 570 flow [2022-11-20 10:55:42,974 INFO L130 PetriNetUnfolder]: 27/270 cut-off events. [2022-11-20 10:55:42,974 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:55:42,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 270 events. 27/270 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 170 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 229. Up to 6 conditions per place. [2022-11-20 10:55:42,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 273 transitions, 570 flow [2022-11-20 10:55:42,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 259 transitions, 536 flow [2022-11-20 10:55:42,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:55:43,004 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;@58530621, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:55:43,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 10:55:43,109 INFO L130 PetriNetUnfolder]: 27/258 cut-off events. [2022-11-20 10:55:43,110 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:55:43,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:43,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:43,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2013925715, now seen corresponding path program 1 times [2022-11-20 10:55:43,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:43,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516105766] [2022-11-20 10:55:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:43,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:43,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:43,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516105766] [2022-11-20 10:55:43,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516105766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:43,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:43,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:55:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124671446] [2022-11-20 10:55:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:55:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:43,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:55:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:55:43,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 273 [2022-11-20 10:55:43,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 259 transitions, 536 flow. Second operand has 2 states, 2 states have (on average 251.0) internal successors, (502), 2 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:43,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 273 [2022-11-20 10:55:43,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:43,660 INFO L130 PetriNetUnfolder]: 30/262 cut-off events. [2022-11-20 10:55:43,661 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-20 10:55:43,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 262 events. 30/262 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 168 event pairs, 0 based on Foata normal form. 19/259 useless extension candidates. Maximal degree in co-relation 234. Up to 31 conditions per place. [2022-11-20 10:55:43,667 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 14 selfloop transitions, 0 changer transitions 7/246 dead transitions. [2022-11-20 10:55:43,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 246 transitions, 538 flow [2022-11-20 10:55:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:55:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:55:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 517 transitions. [2022-11-20 10:55:43,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9468864468864469 [2022-11-20 10:55:43,685 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 517 transitions. [2022-11-20 10:55:43,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 517 transitions. [2022-11-20 10:55:43,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:43,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 517 transitions. [2022-11-20 10:55:43,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 258.5) internal successors, (517), 2 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,705 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,707 INFO L175 Difference]: Start difference. First operand has 242 places, 259 transitions, 536 flow. Second operand 2 states and 517 transitions. [2022-11-20 10:55:43,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 246 transitions, 538 flow [2022-11-20 10:55:43,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 246 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 10:55:43,720 INFO L231 Difference]: Finished difference. Result has 237 places, 239 transitions, 484 flow [2022-11-20 10:55:43,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=484, PETRI_PLACES=237, PETRI_TRANSITIONS=239} [2022-11-20 10:55:43,727 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2022-11-20 10:55:43,727 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 239 transitions, 484 flow [2022-11-20 10:55:43,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 251.0) internal successors, (502), 2 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:43,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:43,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:43,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:55:43,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash -742529873, now seen corresponding path program 1 times [2022-11-20 10:55:43,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:43,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894324123] [2022-11-20 10:55:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:44,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:44,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894324123] [2022-11-20 10:55:44,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894324123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:44,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:44,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:55:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163196079] [2022-11-20 10:55:44,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:44,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:55:44,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:55:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:55:44,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 273 [2022-11-20 10:55:44,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 239 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:44,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:44,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 273 [2022-11-20 10:55:44,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:44,854 INFO L130 PetriNetUnfolder]: 56/335 cut-off events. [2022-11-20 10:55:44,854 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 10:55:44,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 335 events. 56/335 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 452 event pairs, 0 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 432. Up to 47 conditions per place. [2022-11-20 10:55:44,861 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 51 selfloop transitions, 5 changer transitions 4/255 dead transitions. [2022-11-20 10:55:44,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 255 transitions, 641 flow [2022-11-20 10:55:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:55:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1101 transitions. [2022-11-20 10:55:44,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8065934065934066 [2022-11-20 10:55:44,868 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1101 transitions. [2022-11-20 10:55:44,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1101 transitions. [2022-11-20 10:55:44,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:44,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1101 transitions. [2022-11-20 10:55:44,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.2) internal successors, (1101), 5 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:44,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:44,879 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:44,879 INFO L175 Difference]: Start difference. First operand has 237 places, 239 transitions, 484 flow. Second operand 5 states and 1101 transitions. [2022-11-20 10:55:44,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 255 transitions, 641 flow [2022-11-20 10:55:44,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 255 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:55:44,893 INFO L231 Difference]: Finished difference. Result has 237 places, 243 transitions, 521 flow [2022-11-20 10:55:44,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=237, PETRI_TRANSITIONS=243} [2022-11-20 10:55:44,895 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2022-11-20 10:55:44,895 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 243 transitions, 521 flow [2022-11-20 10:55:44,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:44,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:44,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:44,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:55:44,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:44,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1637080928, now seen corresponding path program 1 times [2022-11-20 10:55:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:44,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673553764] [2022-11-20 10:55:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:44,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:45,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673553764] [2022-11-20 10:55:45,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673553764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:45,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:45,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:55:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225032137] [2022-11-20 10:55:45,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:45,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:45,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 273 [2022-11-20 10:55:45,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 243 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:45,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 273 [2022-11-20 10:55:45,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:45,649 INFO L130 PetriNetUnfolder]: 86/433 cut-off events. [2022-11-20 10:55:45,650 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-11-20 10:55:45,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 433 events. 86/433 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 906 event pairs, 2 based on Foata normal form. 10/395 useless extension candidates. Maximal degree in co-relation 593. Up to 64 conditions per place. [2022-11-20 10:55:45,655 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 30 selfloop transitions, 7 changer transitions 0/255 dead transitions. [2022-11-20 10:55:45,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 255 transitions, 633 flow [2022-11-20 10:55:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:55:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2022-11-20 10:55:45,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9120879120879121 [2022-11-20 10:55:45,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2022-11-20 10:55:45,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2022-11-20 10:55:45,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:45,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2022-11-20 10:55:45,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,666 INFO L175 Difference]: Start difference. First operand has 237 places, 243 transitions, 521 flow. Second operand 3 states and 747 transitions. [2022-11-20 10:55:45,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 255 transitions, 633 flow [2022-11-20 10:55:45,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 255 transitions, 622 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 10:55:45,673 INFO L231 Difference]: Finished difference. Result has 235 places, 245 transitions, 549 flow [2022-11-20 10:55:45,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=549, PETRI_PLACES=235, PETRI_TRANSITIONS=245} [2022-11-20 10:55:45,676 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, -7 predicate places. [2022-11-20 10:55:45,676 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 245 transitions, 549 flow [2022-11-20 10:55:45,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:45,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:55:45,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1688580960, now seen corresponding path program 1 times [2022-11-20 10:55:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:45,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990763251] [2022-11-20 10:55:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:45,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:46,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990763251] [2022-11-20 10:55:46,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990763251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:46,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:46,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:55:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604401840] [2022-11-20 10:55:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:46,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:46,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 273 [2022-11-20 10:55:46,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 245 transitions, 549 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:46,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 273 [2022-11-20 10:55:46,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:46,241 INFO L130 PetriNetUnfolder]: 147/636 cut-off events. [2022-11-20 10:55:46,241 INFO L131 PetriNetUnfolder]: For 152/156 co-relation queries the response was YES. [2022-11-20 10:55:46,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 636 events. 147/636 cut-off events. For 152/156 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2140 event pairs, 6 based on Foata normal form. 11/566 useless extension candidates. Maximal degree in co-relation 967. Up to 103 conditions per place. [2022-11-20 10:55:46,250 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 39 selfloop transitions, 2 changer transitions 0/262 dead transitions. [2022-11-20 10:55:46,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 262 transitions, 700 flow [2022-11-20 10:55:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:55:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 754 transitions. [2022-11-20 10:55:46,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9206349206349206 [2022-11-20 10:55:46,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 754 transitions. [2022-11-20 10:55:46,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 754 transitions. [2022-11-20 10:55:46,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:46,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 754 transitions. [2022-11-20 10:55:46,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,263 INFO L175 Difference]: Start difference. First operand has 235 places, 245 transitions, 549 flow. Second operand 3 states and 754 transitions. [2022-11-20 10:55:46,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 262 transitions, 700 flow [2022-11-20 10:55:46,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 262 transitions, 691 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:55:46,269 INFO L231 Difference]: Finished difference. Result has 237 places, 246 transitions, 556 flow [2022-11-20 10:55:46,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=556, PETRI_PLACES=237, PETRI_TRANSITIONS=246} [2022-11-20 10:55:46,273 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2022-11-20 10:55:46,273 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 246 transitions, 556 flow [2022-11-20 10:55:46,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:46,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:46,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:55:46,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2028098881, now seen corresponding path program 1 times [2022-11-20 10:55:46,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:46,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765118707] [2022-11-20 10:55:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:46,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:46,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765118707] [2022-11-20 10:55:46,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765118707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:46,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:46,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:55:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693058155] [2022-11-20 10:55:46,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:46,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:46,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:46,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2022-11-20 10:55:46,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 246 transitions, 556 flow. Second operand has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:46,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2022-11-20 10:55:46,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:46,676 INFO L130 PetriNetUnfolder]: 315/1025 cut-off events. [2022-11-20 10:55:46,676 INFO L131 PetriNetUnfolder]: For 371/383 co-relation queries the response was YES. [2022-11-20 10:55:46,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1025 events. 315/1025 cut-off events. For 371/383 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4790 event pairs, 42 based on Foata normal form. 3/861 useless extension candidates. Maximal degree in co-relation 1735. Up to 216 conditions per place. [2022-11-20 10:55:46,688 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 34 selfloop transitions, 6 changer transitions 0/260 dead transitions. [2022-11-20 10:55:46,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 260 transitions, 698 flow [2022-11-20 10:55:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:55:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2022-11-20 10:55:46,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9157509157509157 [2022-11-20 10:55:46,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2022-11-20 10:55:46,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2022-11-20 10:55:46,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:46,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2022-11-20 10:55:46,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,698 INFO L175 Difference]: Start difference. First operand has 237 places, 246 transitions, 556 flow. Second operand 3 states and 750 transitions. [2022-11-20 10:55:46,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 260 transitions, 698 flow [2022-11-20 10:55:46,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 260 transitions, 695 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:55:46,706 INFO L231 Difference]: Finished difference. Result has 240 places, 247 transitions, 584 flow [2022-11-20 10:55:46,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=584, PETRI_PLACES=240, PETRI_TRANSITIONS=247} [2022-11-20 10:55:46,709 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, -2 predicate places. [2022-11-20 10:55:46,710 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 247 transitions, 584 flow [2022-11-20 10:55:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:46,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:46,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:55:46,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:46,713 INFO L85 PathProgramCache]: Analyzing trace with hash -822381351, now seen corresponding path program 1 times [2022-11-20 10:55:46,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:46,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501104056] [2022-11-20 10:55:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:46,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:46,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:46,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501104056] [2022-11-20 10:55:46,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501104056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:46,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:46,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:55:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497940342] [2022-11-20 10:55:46,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:46,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:55:46,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:55:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:55:46,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 273 [2022-11-20 10:55:46,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 247 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 212.66666666666666) internal successors, (1276), 6 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:46,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 273 [2022-11-20 10:55:46,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:47,396 INFO L130 PetriNetUnfolder]: 199/1019 cut-off events. [2022-11-20 10:55:47,397 INFO L131 PetriNetUnfolder]: For 570/616 co-relation queries the response was YES. [2022-11-20 10:55:47,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 1019 events. 199/1019 cut-off events. For 570/616 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4385 event pairs, 25 based on Foata normal form. 18/896 useless extension candidates. Maximal degree in co-relation 1641. Up to 222 conditions per place. [2022-11-20 10:55:47,409 INFO L137 encePairwiseOnDemand]: 262/273 looper letters, 88 selfloop transitions, 11 changer transitions 0/287 dead transitions. [2022-11-20 10:55:47,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 287 transitions, 880 flow [2022-11-20 10:55:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:55:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:55:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1955 transitions. [2022-11-20 10:55:47,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7956857956857957 [2022-11-20 10:55:47,414 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1955 transitions. [2022-11-20 10:55:47,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1955 transitions. [2022-11-20 10:55:47,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:47,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1955 transitions. [2022-11-20 10:55:47,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.22222222222223) internal successors, (1955), 9 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,426 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,426 INFO L175 Difference]: Start difference. First operand has 240 places, 247 transitions, 584 flow. Second operand 9 states and 1955 transitions. [2022-11-20 10:55:47,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 287 transitions, 880 flow [2022-11-20 10:55:47,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 287 transitions, 868 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:55:47,433 INFO L231 Difference]: Finished difference. Result has 248 places, 251 transitions, 616 flow [2022-11-20 10:55:47,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=616, PETRI_PLACES=248, PETRI_TRANSITIONS=251} [2022-11-20 10:55:47,434 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 6 predicate places. [2022-11-20 10:55:47,434 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 251 transitions, 616 flow [2022-11-20 10:55:47,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 212.66666666666666) internal successors, (1276), 6 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:47,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:47,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:55:47,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2073732870, now seen corresponding path program 1 times [2022-11-20 10:55:47,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:47,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257708192] [2022-11-20 10:55:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:47,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:47,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:47,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257708192] [2022-11-20 10:55:47,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257708192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:47,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:47,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:55:47,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519838487] [2022-11-20 10:55:47,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:47,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:47,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:47,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 273 [2022-11-20 10:55:47,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 251 transitions, 616 flow. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:47,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 273 [2022-11-20 10:55:47,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:47,831 INFO L130 PetriNetUnfolder]: 265/981 cut-off events. [2022-11-20 10:55:47,832 INFO L131 PetriNetUnfolder]: For 526/589 co-relation queries the response was YES. [2022-11-20 10:55:47,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1789 conditions, 981 events. 265/981 cut-off events. For 526/589 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3519 event pairs, 19 based on Foata normal form. 2/891 useless extension candidates. Maximal degree in co-relation 1779. Up to 213 conditions per place. [2022-11-20 10:55:47,842 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 32 selfloop transitions, 5 changer transitions 3/258 dead transitions. [2022-11-20 10:55:47,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 258 transitions, 714 flow [2022-11-20 10:55:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:55:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 741 transitions. [2022-11-20 10:55:47,845 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2022-11-20 10:55:47,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 741 transitions. [2022-11-20 10:55:47,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 741 transitions. [2022-11-20 10:55:47,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:47,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 741 transitions. [2022-11-20 10:55:47,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,850 INFO L175 Difference]: Start difference. First operand has 248 places, 251 transitions, 616 flow. Second operand 3 states and 741 transitions. [2022-11-20 10:55:47,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 258 transitions, 714 flow [2022-11-20 10:55:47,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 258 transitions, 705 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:55:47,862 INFO L231 Difference]: Finished difference. Result has 249 places, 247 transitions, 608 flow [2022-11-20 10:55:47,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=608, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2022-11-20 10:55:47,863 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 7 predicate places. [2022-11-20 10:55:47,863 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 608 flow [2022-11-20 10:55:47,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:47,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:47,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:55:47,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1263478612, now seen corresponding path program 1 times [2022-11-20 10:55:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:47,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079242375] [2022-11-20 10:55:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:49,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:49,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079242375] [2022-11-20 10:55:49,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079242375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:49,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948400370] [2022-11-20 10:55:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:49,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:49,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:49,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:49,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:55:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:49,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:55:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:51,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:51,878 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 10:55:51,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 10:55:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:53,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948400370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:53,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:53,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 13] total 39 [2022-11-20 10:55:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685016313] [2022-11-20 10:55:53,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:53,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 10:55:53,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 10:55:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 10:55:53,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 273 [2022-11-20 10:55:53,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 608 flow. Second operand has 39 states, 39 states have (on average 146.5897435897436) internal successors, (5717), 39 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:53,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:53,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 273 [2022-11-20 10:55:53,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:56,583 INFO L130 PetriNetUnfolder]: 1456/5135 cut-off events. [2022-11-20 10:55:56,584 INFO L131 PetriNetUnfolder]: For 3221/3537 co-relation queries the response was YES. [2022-11-20 10:55:56,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10128 conditions, 5135 events. 1456/5135 cut-off events. For 3221/3537 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 44682 event pairs, 2 based on Foata normal form. 28/4507 useless extension candidates. Maximal degree in co-relation 10117. Up to 821 conditions per place. [2022-11-20 10:55:56,642 INFO L137 encePairwiseOnDemand]: 242/273 looper letters, 291 selfloop transitions, 67 changer transitions 16/503 dead transitions. [2022-11-20 10:55:56,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 503 transitions, 2252 flow [2022-11-20 10:55:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 10:55:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 10:55:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5964 transitions. [2022-11-20 10:55:56,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5461538461538461 [2022-11-20 10:55:56,657 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5964 transitions. [2022-11-20 10:55:56,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5964 transitions. [2022-11-20 10:55:56,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:56,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5964 transitions. [2022-11-20 10:55:56,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 149.1) internal successors, (5964), 40 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:56,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 273.0) internal successors, (11193), 41 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:56,699 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 273.0) internal successors, (11193), 41 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:56,699 INFO L175 Difference]: Start difference. First operand has 249 places, 247 transitions, 608 flow. Second operand 40 states and 5964 transitions. [2022-11-20 10:55:56,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 503 transitions, 2252 flow [2022-11-20 10:55:56,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 503 transitions, 2195 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:55:56,712 INFO L231 Difference]: Finished difference. Result has 303 places, 298 transitions, 1155 flow [2022-11-20 10:55:56,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1155, PETRI_PLACES=303, PETRI_TRANSITIONS=298} [2022-11-20 10:55:56,716 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 61 predicate places. [2022-11-20 10:55:56,716 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 298 transitions, 1155 flow [2022-11-20 10:55:56,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 146.5897435897436) internal successors, (5717), 39 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:56,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:56,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:56,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:56,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:56,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1150301714, now seen corresponding path program 1 times [2022-11-20 10:55:56,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:56,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748320852] [2022-11-20 10:55:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:56,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:57,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748320852] [2022-11-20 10:55:57,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748320852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:57,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:57,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:55:57,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986741139] [2022-11-20 10:55:57,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:57,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:57,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2022-11-20 10:55:57,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 298 transitions, 1155 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:57,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:57,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2022-11-20 10:55:57,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:58,531 INFO L130 PetriNetUnfolder]: 1454/5057 cut-off events. [2022-11-20 10:55:58,531 INFO L131 PetriNetUnfolder]: For 15291/15855 co-relation queries the response was YES. [2022-11-20 10:55:58,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12998 conditions, 5057 events. 1454/5057 cut-off events. For 15291/15855 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 45444 event pairs, 274 based on Foata normal form. 17/4421 useless extension candidates. Maximal degree in co-relation 12966. Up to 1162 conditions per place. [2022-11-20 10:55:58,589 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 70 selfloop transitions, 9 changer transitions 0/313 dead transitions. [2022-11-20 10:55:58,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 313 transitions, 1430 flow [2022-11-20 10:55:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:55:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2022-11-20 10:55:58,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9157509157509157 [2022-11-20 10:55:58,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2022-11-20 10:55:58,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2022-11-20 10:55:58,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:58,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2022-11-20 10:55:58,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:58,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:58,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:58,597 INFO L175 Difference]: Start difference. First operand has 303 places, 298 transitions, 1155 flow. Second operand 3 states and 750 transitions. [2022-11-20 10:55:58,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 313 transitions, 1430 flow [2022-11-20 10:55:58,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 313 transitions, 1320 flow, removed 42 selfloop flow, removed 16 redundant places. [2022-11-20 10:55:58,640 INFO L231 Difference]: Finished difference. Result has 285 places, 291 transitions, 1032 flow [2022-11-20 10:55:58,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1032, PETRI_PLACES=285, PETRI_TRANSITIONS=291} [2022-11-20 10:55:58,642 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 43 predicate places. [2022-11-20 10:55:58,642 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 291 transitions, 1032 flow [2022-11-20 10:55:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:58,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:58,643 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:55:58,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:55:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash 172295221, now seen corresponding path program 1 times [2022-11-20 10:55:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:58,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997935251] [2022-11-20 10:55:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:58,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:55:59,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:59,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997935251] [2022-11-20 10:55:59,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997935251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:59,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:59,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944297811] [2022-11-20 10:55:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:59,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 273 [2022-11-20 10:55:59,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 291 transitions, 1032 flow. Second operand has 4 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:59,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:59,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 273 [2022-11-20 10:55:59,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:00,056 INFO L130 PetriNetUnfolder]: 703/3389 cut-off events. [2022-11-20 10:56:00,057 INFO L131 PetriNetUnfolder]: For 11213/11546 co-relation queries the response was YES. [2022-11-20 10:56:00,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8193 conditions, 3389 events. 703/3389 cut-off events. For 11213/11546 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 28365 event pairs, 83 based on Foata normal form. 67/3110 useless extension candidates. Maximal degree in co-relation 8167. Up to 710 conditions per place. [2022-11-20 10:56:00,094 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 77 selfloop transitions, 6 changer transitions 0/315 dead transitions. [2022-11-20 10:56:00,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 315 transitions, 1409 flow [2022-11-20 10:56:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:56:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:56:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 984 transitions. [2022-11-20 10:56:00,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9010989010989011 [2022-11-20 10:56:00,098 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 984 transitions. [2022-11-20 10:56:00,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 984 transitions. [2022-11-20 10:56:00,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:00,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 984 transitions. [2022-11-20 10:56:00,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:00,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:00,104 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:00,104 INFO L175 Difference]: Start difference. First operand has 285 places, 291 transitions, 1032 flow. Second operand 4 states and 984 transitions. [2022-11-20 10:56:00,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 315 transitions, 1409 flow [2022-11-20 10:56:00,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 315 transitions, 1369 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-20 10:56:00,135 INFO L231 Difference]: Finished difference. Result has 285 places, 287 transitions, 994 flow [2022-11-20 10:56:00,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=994, PETRI_PLACES=285, PETRI_TRANSITIONS=287} [2022-11-20 10:56:00,137 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 43 predicate places. [2022-11-20 10:56:00,137 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 287 transitions, 994 flow [2022-11-20 10:56:00,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:00,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:00,138 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:56:00,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1213748891, now seen corresponding path program 2 times [2022-11-20 10:56:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:00,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520920966] [2022-11-20 10:56:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:00,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:00,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520920966] [2022-11-20 10:56:00,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520920966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:00,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:00,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:56:00,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745106091] [2022-11-20 10:56:00,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:00,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:56:00,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:56:00,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:56:00,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 273 [2022-11-20 10:56:00,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 287 transitions, 994 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:00,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:00,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 273 [2022-11-20 10:56:00,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:01,583 INFO L130 PetriNetUnfolder]: 1430/4730 cut-off events. [2022-11-20 10:56:01,584 INFO L131 PetriNetUnfolder]: For 20049/20602 co-relation queries the response was YES. [2022-11-20 10:56:01,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13964 conditions, 4730 events. 1430/4730 cut-off events. For 20049/20602 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 38834 event pairs, 180 based on Foata normal form. 9/4186 useless extension candidates. Maximal degree in co-relation 13938. Up to 1389 conditions per place. [2022-11-20 10:56:01,656 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 61 selfloop transitions, 14 changer transitions 0/305 dead transitions. [2022-11-20 10:56:01,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 305 transitions, 1290 flow [2022-11-20 10:56:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:56:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:56:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2022-11-20 10:56:01,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.905982905982906 [2022-11-20 10:56:01,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2022-11-20 10:56:01,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2022-11-20 10:56:01,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:01,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2022-11-20 10:56:01,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:01,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:01,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:01,664 INFO L175 Difference]: Start difference. First operand has 285 places, 287 transitions, 994 flow. Second operand 3 states and 742 transitions. [2022-11-20 10:56:01,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 305 transitions, 1290 flow [2022-11-20 10:56:01,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 305 transitions, 1280 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:56:01,685 INFO L231 Difference]: Finished difference. Result has 287 places, 288 transitions, 1048 flow [2022-11-20 10:56:01,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1048, PETRI_PLACES=287, PETRI_TRANSITIONS=288} [2022-11-20 10:56:01,686 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 45 predicate places. [2022-11-20 10:56:01,687 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 288 transitions, 1048 flow [2022-11-20 10:56:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:01,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:01,687 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:01,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:56:01,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash 506223541, now seen corresponding path program 1 times [2022-11-20 10:56:01,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388908749] [2022-11-20 10:56:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:01,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388908749] [2022-11-20 10:56:01,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388908749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:01,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:01,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:56:01,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791767427] [2022-11-20 10:56:01,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:01,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:56:01,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:56:01,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:56:01,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 273 [2022-11-20 10:56:01,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 288 transitions, 1048 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:01,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:01,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 273 [2022-11-20 10:56:01,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:03,413 INFO L130 PetriNetUnfolder]: 1366/4655 cut-off events. [2022-11-20 10:56:03,413 INFO L131 PetriNetUnfolder]: For 20777/21333 co-relation queries the response was YES. [2022-11-20 10:56:03,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14085 conditions, 4655 events. 1366/4655 cut-off events. For 20777/21333 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 37010 event pairs, 173 based on Foata normal form. 62/4305 useless extension candidates. Maximal degree in co-relation 14058. Up to 1253 conditions per place. [2022-11-20 10:56:03,475 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 55 selfloop transitions, 11 changer transitions 0/296 dead transitions. [2022-11-20 10:56:03,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 296 transitions, 1204 flow [2022-11-20 10:56:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:56:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:56:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 744 transitions. [2022-11-20 10:56:03,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9084249084249084 [2022-11-20 10:56:03,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 744 transitions. [2022-11-20 10:56:03,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 744 transitions. [2022-11-20 10:56:03,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:03,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 744 transitions. [2022-11-20 10:56:03,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:03,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:03,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:03,483 INFO L175 Difference]: Start difference. First operand has 287 places, 288 transitions, 1048 flow. Second operand 3 states and 744 transitions. [2022-11-20 10:56:03,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 296 transitions, 1204 flow [2022-11-20 10:56:03,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 296 transitions, 1186 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:56:03,505 INFO L231 Difference]: Finished difference. Result has 289 places, 282 transitions, 993 flow [2022-11-20 10:56:03,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=993, PETRI_PLACES=289, PETRI_TRANSITIONS=282} [2022-11-20 10:56:03,507 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 47 predicate places. [2022-11-20 10:56:03,507 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 282 transitions, 993 flow [2022-11-20 10:56:03,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:03,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:03,508 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:03,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:56:03,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2072705269, now seen corresponding path program 1 times [2022-11-20 10:56:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:03,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589042980] [2022-11-20 10:56:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:03,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:03,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589042980] [2022-11-20 10:56:03,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589042980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:03,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:03,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:56:03,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069724877] [2022-11-20 10:56:03,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:03,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:56:03,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:56:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:56:03,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 273 [2022-11-20 10:56:03,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 282 transitions, 993 flow. Second operand has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:03,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:03,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 273 [2022-11-20 10:56:03,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:04,855 INFO L130 PetriNetUnfolder]: 720/3881 cut-off events. [2022-11-20 10:56:04,855 INFO L131 PetriNetUnfolder]: For 9957/10254 co-relation queries the response was YES. [2022-11-20 10:56:04,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 3881 events. 720/3881 cut-off events. For 9957/10254 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 32410 event pairs, 120 based on Foata normal form. 3/3530 useless extension candidates. Maximal degree in co-relation 9185. Up to 961 conditions per place. [2022-11-20 10:56:04,913 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 82 selfloop transitions, 6 changer transitions 15/301 dead transitions. [2022-11-20 10:56:04,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 301 transitions, 1311 flow [2022-11-20 10:56:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:56:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:56:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1515 transitions. [2022-11-20 10:56:04,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.792778649921507 [2022-11-20 10:56:04,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1515 transitions. [2022-11-20 10:56:04,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1515 transitions. [2022-11-20 10:56:04,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:04,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1515 transitions. [2022-11-20 10:56:04,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 216.42857142857142) internal successors, (1515), 7 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:04,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:04,940 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:04,940 INFO L175 Difference]: Start difference. First operand has 289 places, 282 transitions, 993 flow. Second operand 7 states and 1515 transitions. [2022-11-20 10:56:04,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 301 transitions, 1311 flow [2022-11-20 10:56:04,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 301 transitions, 1289 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:56:04,958 INFO L231 Difference]: Finished difference. Result has 295 places, 283 transitions, 993 flow [2022-11-20 10:56:04,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=993, PETRI_PLACES=295, PETRI_TRANSITIONS=283} [2022-11-20 10:56:04,960 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 53 predicate places. [2022-11-20 10:56:04,960 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 283 transitions, 993 flow [2022-11-20 10:56:04,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:04,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:04,961 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:04,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:56:04,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:04,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash -534054025, now seen corresponding path program 1 times [2022-11-20 10:56:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:04,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254102195] [2022-11-20 10:56:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:04,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:06,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254102195] [2022-11-20 10:56:06,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254102195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099533730] [2022-11-20 10:56:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:06,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:06,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:06,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:06,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:56:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:56:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:56:08,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:08,278 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 10:56:08,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 10:56:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:56:09,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099533730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:09,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:09,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 40 [2022-11-20 10:56:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411926693] [2022-11-20 10:56:09,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 10:56:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 10:56:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 10:56:09,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2022-11-20 10:56:09,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 283 transitions, 993 flow. Second operand has 40 states, 40 states have (on average 136.025) internal successors, (5441), 40 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:09,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:09,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2022-11-20 10:56:09,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:24,177 INFO L130 PetriNetUnfolder]: 16152/45559 cut-off events. [2022-11-20 10:56:24,177 INFO L131 PetriNetUnfolder]: For 208841/214097 co-relation queries the response was YES. [2022-11-20 10:56:24,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145861 conditions, 45559 events. 16152/45559 cut-off events. For 208841/214097 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 562092 event pairs, 1008 based on Foata normal form. 187/40484 useless extension candidates. Maximal degree in co-relation 145831. Up to 10133 conditions per place. [2022-11-20 10:56:25,016 INFO L137 encePairwiseOnDemand]: 240/273 looper letters, 520 selfloop transitions, 110 changer transitions 24/776 dead transitions. [2022-11-20 10:56:25,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 776 transitions, 5408 flow [2022-11-20 10:56:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 10:56:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-20 10:56:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 6514 transitions. [2022-11-20 10:56:25,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5187131708870839 [2022-11-20 10:56:25,033 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 6514 transitions. [2022-11-20 10:56:25,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 6514 transitions. [2022-11-20 10:56:25,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:25,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 6514 transitions. [2022-11-20 10:56:25,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 141.6086956521739) internal successors, (6514), 46 states have internal predecessors, (6514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:25,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 273.0) internal successors, (12831), 47 states have internal predecessors, (12831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:25,076 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 273.0) internal successors, (12831), 47 states have internal predecessors, (12831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:25,076 INFO L175 Difference]: Start difference. First operand has 295 places, 283 transitions, 993 flow. Second operand 46 states and 6514 transitions. [2022-11-20 10:56:25,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 776 transitions, 5408 flow [2022-11-20 10:56:25,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 776 transitions, 5394 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-20 10:56:25,382 INFO L231 Difference]: Finished difference. Result has 360 places, 376 transitions, 2421 flow [2022-11-20 10:56:25,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2421, PETRI_PLACES=360, PETRI_TRANSITIONS=376} [2022-11-20 10:56:25,383 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 118 predicate places. [2022-11-20 10:56:25,383 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 376 transitions, 2421 flow [2022-11-20 10:56:25,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 136.025) internal successors, (5441), 40 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:25,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:25,385 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:25,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:25,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:25,592 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash 499084524, now seen corresponding path program 1 times [2022-11-20 10:56:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:25,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142500537] [2022-11-20 10:56:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:56:25,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:25,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142500537] [2022-11-20 10:56:25,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142500537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:25,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797300763] [2022-11-20 10:56:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:25,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:25,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:25,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:25,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:56:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:26,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:56:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:26,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:28,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797300763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:28,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:28,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-11-20 10:56:28,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629342374] [2022-11-20 10:56:28,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:28,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:56:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:56:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:56:28,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 273 [2022-11-20 10:56:28,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 376 transitions, 2421 flow. Second operand has 22 states, 22 states have (on average 206.04545454545453) internal successors, (4533), 22 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:28,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:28,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 273 [2022-11-20 10:56:28,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:33,504 INFO L130 PetriNetUnfolder]: 3846/18439 cut-off events. [2022-11-20 10:56:33,504 INFO L131 PetriNetUnfolder]: For 105583/107344 co-relation queries the response was YES. [2022-11-20 10:56:33,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56163 conditions, 18439 events. 3846/18439 cut-off events. For 105583/107344 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 228771 event pairs, 339 based on Foata normal form. 140/16498 useless extension candidates. Maximal degree in co-relation 56108. Up to 3379 conditions per place. [2022-11-20 10:56:33,947 INFO L137 encePairwiseOnDemand]: 250/273 looper letters, 237 selfloop transitions, 52 changer transitions 5/490 dead transitions. [2022-11-20 10:56:33,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 490 transitions, 4110 flow [2022-11-20 10:56:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:56:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 10:56:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4337 transitions. [2022-11-20 10:56:33,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7564974707831851 [2022-11-20 10:56:33,954 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4337 transitions. [2022-11-20 10:56:33,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4337 transitions. [2022-11-20 10:56:33,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:33,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4337 transitions. [2022-11-20 10:56:33,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 206.52380952380952) internal successors, (4337), 21 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:33,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:33,980 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:33,980 INFO L175 Difference]: Start difference. First operand has 360 places, 376 transitions, 2421 flow. Second operand 21 states and 4337 transitions. [2022-11-20 10:56:33,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 490 transitions, 4110 flow [2022-11-20 10:56:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 490 transitions, 3568 flow, removed 234 selfloop flow, removed 24 redundant places. [2022-11-20 10:56:34,477 INFO L231 Difference]: Finished difference. Result has 349 places, 358 transitions, 2151 flow [2022-11-20 10:56:34,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2151, PETRI_PLACES=349, PETRI_TRANSITIONS=358} [2022-11-20 10:56:34,479 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 107 predicate places. [2022-11-20 10:56:34,480 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 358 transitions, 2151 flow [2022-11-20 10:56:34,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 206.04545454545453) internal successors, (4533), 22 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:34,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:34,482 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:34,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:56:34,689 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -700106908, now seen corresponding path program 2 times [2022-11-20 10:56:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:34,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365414765] [2022-11-20 10:56:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:56:34,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365414765] [2022-11-20 10:56:34,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365414765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988130349] [2022-11-20 10:56:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:34,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:34,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:56:35,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:56:35,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:56:35,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:56:35,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988130349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:35,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:56:35,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 10:56:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586704386] [2022-11-20 10:56:35,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:35,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:56:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:56:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:56:35,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2022-11-20 10:56:35,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 358 transitions, 2151 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:35,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:35,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2022-11-20 10:56:35,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:41,299 INFO L130 PetriNetUnfolder]: 6864/25734 cut-off events. [2022-11-20 10:56:41,299 INFO L131 PetriNetUnfolder]: For 155202/158124 co-relation queries the response was YES. [2022-11-20 10:56:41,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80618 conditions, 25734 events. 6864/25734 cut-off events. For 155202/158124 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 323965 event pairs, 1582 based on Foata normal form. 229/23069 useless extension candidates. Maximal degree in co-relation 80570. Up to 5256 conditions per place. [2022-11-20 10:56:41,804 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 126 selfloop transitions, 24 changer transitions 0/404 dead transitions. [2022-11-20 10:56:41,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 404 transitions, 3113 flow [2022-11-20 10:56:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:56:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:56:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2022-11-20 10:56:41,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2022-11-20 10:56:41,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2022-11-20 10:56:41,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2022-11-20 10:56:41,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:41,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2022-11-20 10:56:41,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:41,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:41,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:41,812 INFO L175 Difference]: Start difference. First operand has 349 places, 358 transitions, 2151 flow. Second operand 3 states and 749 transitions. [2022-11-20 10:56:41,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 404 transitions, 3113 flow [2022-11-20 10:56:42,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 404 transitions, 2990 flow, removed 46 selfloop flow, removed 13 redundant places. [2022-11-20 10:56:42,075 INFO L231 Difference]: Finished difference. Result has 338 places, 357 transitions, 2107 flow [2022-11-20 10:56:42,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2107, PETRI_PLACES=338, PETRI_TRANSITIONS=357} [2022-11-20 10:56:42,077 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 96 predicate places. [2022-11-20 10:56:42,077 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 357 transitions, 2107 flow [2022-11-20 10:56:42,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:42,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:42,078 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:42,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 10:56:42,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:56:42,280 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 32762021, now seen corresponding path program 1 times [2022-11-20 10:56:42,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:42,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603957092] [2022-11-20 10:56:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:42,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:56:42,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:42,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603957092] [2022-11-20 10:56:42,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603957092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:42,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885670443] [2022-11-20 10:56:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:42,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:42,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:42,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:56:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:42,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:56:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:56:43,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:56:43,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885670443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:43,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:43,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 10:56:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266330517] [2022-11-20 10:56:43,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:43,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:56:43,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:56:43,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:56:43,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 273 [2022-11-20 10:56:43,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 357 transitions, 2107 flow. Second operand has 19 states, 19 states have (on average 206.31578947368422) internal successors, (3920), 19 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:43,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:43,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 273 [2022-11-20 10:56:43,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:48,348 INFO L130 PetriNetUnfolder]: 3079/16140 cut-off events. [2022-11-20 10:56:48,348 INFO L131 PetriNetUnfolder]: For 78207/80068 co-relation queries the response was YES. [2022-11-20 10:56:48,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44019 conditions, 16140 events. 3079/16140 cut-off events. For 78207/80068 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 202592 event pairs, 711 based on Foata normal form. 68/14685 useless extension candidates. Maximal degree in co-relation 43971. Up to 4417 conditions per place. [2022-11-20 10:56:48,525 INFO L137 encePairwiseOnDemand]: 254/273 looper letters, 122 selfloop transitions, 20 changer transitions 53/387 dead transitions. [2022-11-20 10:56:48,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 387 transitions, 2515 flow [2022-11-20 10:56:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:56:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-20 10:56:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3542 transitions. [2022-11-20 10:56:48,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7631975867269984 [2022-11-20 10:56:48,530 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3542 transitions. [2022-11-20 10:56:48,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3542 transitions. [2022-11-20 10:56:48,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:48,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3542 transitions. [2022-11-20 10:56:48,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 208.35294117647058) internal successors, (3542), 17 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:48,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 273.0) internal successors, (4914), 18 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:48,544 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 273.0) internal successors, (4914), 18 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:48,544 INFO L175 Difference]: Start difference. First operand has 338 places, 357 transitions, 2107 flow. Second operand 17 states and 3542 transitions. [2022-11-20 10:56:48,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 387 transitions, 2515 flow [2022-11-20 10:56:48,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 387 transitions, 2434 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-11-20 10:56:48,707 INFO L231 Difference]: Finished difference. Result has 347 places, 330 transitions, 1832 flow [2022-11-20 10:56:48,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1832, PETRI_PLACES=347, PETRI_TRANSITIONS=330} [2022-11-20 10:56:48,708 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 105 predicate places. [2022-11-20 10:56:48,708 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 330 transitions, 1832 flow [2022-11-20 10:56:48,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 206.31578947368422) internal successors, (3920), 19 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:48,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:48,709 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:48,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:48,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:56:48,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:48,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1551895628, now seen corresponding path program 2 times [2022-11-20 10:56:48,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:48,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223226861] [2022-11-20 10:56:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:48,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:56:49,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:49,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223226861] [2022-11-20 10:56:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223226861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743428294] [2022-11-20 10:56:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:49,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:49,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:49,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:49,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:56:49,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:49,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:56:49,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 10:56:49,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:56:49,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743428294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:49,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:56:49,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 10:56:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179331754] [2022-11-20 10:56:49,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:49,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:56:49,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:56:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:56:49,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 273 [2022-11-20 10:56:49,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 330 transitions, 1832 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:49,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:49,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 273 [2022-11-20 10:56:49,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:54,207 INFO L130 PetriNetUnfolder]: 4622/19104 cut-off events. [2022-11-20 10:56:54,207 INFO L131 PetriNetUnfolder]: For 62764/64700 co-relation queries the response was YES. [2022-11-20 10:56:54,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46641 conditions, 19104 events. 4622/19104 cut-off events. For 62764/64700 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 232866 event pairs, 1719 based on Foata normal form. 33/17058 useless extension candidates. Maximal degree in co-relation 46595. Up to 5002 conditions per place. [2022-11-20 10:56:54,348 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 78 selfloop transitions, 6 changer transitions 0/322 dead transitions. [2022-11-20 10:56:54,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 322 transitions, 1886 flow [2022-11-20 10:56:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:56:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:56:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2022-11-20 10:56:54,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2022-11-20 10:56:54,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2022-11-20 10:56:54,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2022-11-20 10:56:54,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:54,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2022-11-20 10:56:54,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,354 INFO L175 Difference]: Start difference. First operand has 347 places, 330 transitions, 1832 flow. Second operand 3 states and 749 transitions. [2022-11-20 10:56:54,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 322 transitions, 1886 flow [2022-11-20 10:56:54,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 322 transitions, 1760 flow, removed 31 selfloop flow, removed 28 redundant places. [2022-11-20 10:56:54,567 INFO L231 Difference]: Finished difference. Result has 301 places, 294 transitions, 1266 flow [2022-11-20 10:56:54,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1266, PETRI_PLACES=301, PETRI_TRANSITIONS=294} [2022-11-20 10:56:54,568 INFO L288 CegarLoopForPetriNet]: 242 programPoint places, 59 predicate places. [2022-11-20 10:56:54,569 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 294 transitions, 1266 flow [2022-11-20 10:56:54,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:54,570 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:54,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:54,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:56:54,775 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:54,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1819650552, now seen corresponding path program 2 times [2022-11-20 10:56:54,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:54,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169119685] [2022-11-20 10:56:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:54,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 10:56:55,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:55,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169119685] [2022-11-20 10:56:55,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169119685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:55,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648349231] [2022-11-20 10:56:55,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:55,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:55,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:55,062 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:55,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed5f645b-8404-483a-8aa5-84eadac1f810/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:56:55,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:56:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 10:56:55,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 10:56:55,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648349231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:55,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:55,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-11-20 10:56:55,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417358222] [2022-11-20 10:56:55,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:55,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 273 [2022-11-20 10:56:55,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 294 transitions, 1266 flow. Second operand has 7 states, 7 states have (on average 244.85714285714286) internal successors, (1714), 7 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:55,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:55,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 273 [2022-11-20 10:56:55,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand