./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.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_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/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_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/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_2c821071-c5da-4e88-bb15-15c302fc7f53/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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- 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 10:53:18,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:53:18,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:53:18,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:53:18,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:53:18,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:53:18,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:53:18,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:53:18,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:53:18,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:53:18,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:53:18,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:53:18,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:53:18,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:53:18,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:53:18,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:53:18,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:53:18,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:53:18,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:53:18,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:53:18,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:53:18,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:53:18,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:53:18,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:53:18,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:53:18,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:53:18,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:53:18,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:53:18,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:53:18,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:53:18,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:53:18,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:53:18,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:53:18,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:53:18,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:53:18,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:53:18,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:53:18,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:53:18,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:53:18,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:53:18,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:53:18,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:53:18,455 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:53:18,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:53:18,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:53:18,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:53:18,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:53:18,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:53:18,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:53:18,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:53:18,459 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:53:18,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:53:18,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:53:18,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:53:18,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:53:18,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:53:18,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:53:18,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:53:18,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:53:18,461 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:53:18,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:53:18,462 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:53:18,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:53:18,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:53:18,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:53:18,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:53:18,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:53:18,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:53:18,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:53:18,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:53:18,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:53:18,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:53:18,465 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:53:18,466 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:53:18,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:53:18,466 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_2c821071-c5da-4e88-bb15-15c302fc7f53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-11-20 10:53:18,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:53:18,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:53:18,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:53:18,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:53:18,793 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:53:18,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-20 10:53:22,030 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:53:22,245 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:53:22,246 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-20 10:53:22,254 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/data/a06b61b65/af519bc3f3c1489dae559d84a2c64489/FLAG3f761ccf4 [2022-11-20 10:53:22,268 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/data/a06b61b65/af519bc3f3c1489dae559d84a2c64489 [2022-11-20 10:53:22,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:53:22,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:53:22,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:53:22,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:53:22,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:53:22,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87f17bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22, skipping insertion in model container [2022-11-20 10:53:22,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:53:22,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:53:22,496 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_2c821071-c5da-4e88-bb15-15c302fc7f53/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-20 10:53:22,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:53:22,512 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:53:22,534 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_2c821071-c5da-4e88-bb15-15c302fc7f53/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-20 10:53:22,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:53:22,548 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:53:22,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22 WrapperNode [2022-11-20 10:53:22,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:53:22,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:53:22,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:53:22,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:53:22,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,585 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-20 10:53:22,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:53:22,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:53:22,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:53:22,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:53:22,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,610 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:53:22,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:53:22,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:53:22,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:53:22,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (1/1) ... [2022-11-20 10:53:22,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:53:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:22,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:53:22,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:53:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:53:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:53:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:53:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:53:22,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:53:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:53:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:53:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:53:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:53:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:53:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:53:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:53:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:53:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:53:22,709 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 10:53:22,816 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:53:22,819 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:53:23,142 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:53:23,221 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:53:23,222 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:53:23,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:23 BoogieIcfgContainer [2022-11-20 10:53:23,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:53:23,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:53:23,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:53:23,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:53:23,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:53:22" (1/3) ... [2022-11-20 10:53:23,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc7cf90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:23, skipping insertion in model container [2022-11-20 10:53:23,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:53:22" (2/3) ... [2022-11-20 10:53:23,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc7cf90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:53:23, skipping insertion in model container [2022-11-20 10:53:23,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:53:23" (3/3) ... [2022-11-20 10:53:23,253 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-11-20 10:53:23,267 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:53:23,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:53:23,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:53:23,279 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:53:23,378 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:53:23,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-11-20 10:53:23,479 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2022-11-20 10:53:23,479 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:53:23,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-20 10:53:23,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-11-20 10:53:23,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-11-20 10:53:23,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:53:23,510 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;@4dad652a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:53:23,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 10:53:23,542 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-11-20 10:53:23,543 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:53:23,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:23,544 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] [2022-11-20 10:53:23,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:23,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1497935551, now seen corresponding path program 1 times [2022-11-20 10:53:23,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:23,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186496003] [2022-11-20 10:53:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:23,827 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 10:53:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:23,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186496003] [2022-11-20 10:53:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186496003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:23,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:23,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280170177] [2022-11-20 10:53:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:53:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:53:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:53:23,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-11-20 10:53:23,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 10:53:23,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:23,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-11-20 10:53:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:24,075 INFO L130 PetriNetUnfolder]: 16/112 cut-off events. [2022-11-20 10:53:24,076 INFO L131 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-11-20 10:53:24,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 5 based on Foata normal form. 14/115 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-11-20 10:53:24,080 INFO L137 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-11-20 10:53:24,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-11-20 10:53:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:53:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:53:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-11-20 10:53:24,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-11-20 10:53:24,100 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-11-20 10:53:24,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-11-20 10:53:24,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:24,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-11-20 10:53:24,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 10:53:24,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:53:24,115 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:53:24,117 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-11-20 10:53:24,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-11-20 10:53:24,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:53:24,126 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-11-20 10:53:24,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-11-20 10:53:24,133 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-11-20 10:53:24,133 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-11-20 10:53:24,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 10:53:24,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:24,135 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] [2022-11-20 10:53:24,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:53:24,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 855667735, now seen corresponding path program 1 times [2022-11-20 10:53:24,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:24,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792101823] [2022-11-20 10:53:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:24,966 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 10:53:24,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:24,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792101823] [2022-11-20 10:53:24,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792101823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:24,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:24,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:53:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113906467] [2022-11-20 10:53:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:24,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:53:24,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:24,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:53:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:24,972 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-20 10:53:24,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 10:53:24,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:24,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-20 10:53:24,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:25,254 INFO L130 PetriNetUnfolder]: 44/170 cut-off events. [2022-11-20 10:53:25,254 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 10:53:25,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 170 events. 44/170 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 420 event pairs, 10 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 274. Up to 49 conditions per place. [2022-11-20 10:53:25,260 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 33 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-11-20 10:53:25,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 259 flow [2022-11-20 10:53:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:53:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:53:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2022-11-20 10:53:25,272 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-11-20 10:53:25,272 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2022-11-20 10:53:25,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2022-11-20 10:53:25,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:25,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2022-11-20 10:53:25,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:25,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states 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 10:53:25,279 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states 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 10:53:25,279 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 441 transitions. [2022-11-20 10:53:25,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 259 flow [2022-11-20 10:53:25,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:53:25,287 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 187 flow [2022-11-20 10:53:25,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2022-11-20 10:53:25,289 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2022-11-20 10:53:25,289 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 187 flow [2022-11-20 10:53:25,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 10:53:25,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:25,291 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] [2022-11-20 10:53:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:53:25,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash 251417684, now seen corresponding path program 1 times [2022-11-20 10:53:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:25,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171014793] [2022-11-20 10:53:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:25,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:26,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171014793] [2022-11-20 10:53:26,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171014793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053907384] [2022-11-20 10:53:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:26,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:26,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:53:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:53:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:28,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:29,496 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 10:53:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053907384] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:29,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2022-11-20 10:53:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111924067] [2022-11-20 10:53:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:53:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:53:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:53:29,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-20 10:53:29,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 187 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:53:29,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:29,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-20 10:53:29,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:31,474 INFO L130 PetriNetUnfolder]: 210/631 cut-off events. [2022-11-20 10:53:31,475 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-11-20 10:53:31,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 631 events. 210/631 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3206 event pairs, 31 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 1296. Up to 99 conditions per place. [2022-11-20 10:53:31,481 INFO L137 encePairwiseOnDemand]: 69/88 looper letters, 94 selfloop transitions, 55 changer transitions 16/204 dead transitions. [2022-11-20 10:53:31,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 915 flow [2022-11-20 10:53:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:53:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 10:53:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2022-11-20 10:53:31,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2022-11-20 10:53:31,486 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2022-11-20 10:53:31,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2022-11-20 10:53:31,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:31,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2022-11-20 10:53:31,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 10:53:31,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states 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 10:53:31,500 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states 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 10:53:31,500 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 187 flow. Second operand 28 states and 1525 transitions. [2022-11-20 10:53:31,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 915 flow [2022-11-20 10:53:31,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 204 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:53:31,507 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 517 flow [2022-11-20 10:53:31,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=517, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2022-11-20 10:53:31,508 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2022-11-20 10:53:31,508 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 517 flow [2022-11-20 10:53:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:53:31,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:31,509 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] [2022-11-20 10:53:31,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:31,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:31,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:31,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1002934387, now seen corresponding path program 1 times [2022-11-20 10:53:31,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:31,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996877849] [2022-11-20 10:53:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:33,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:33,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996877849] [2022-11-20 10:53:33,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996877849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:33,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607139924] [2022-11-20 10:53:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:33,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:33,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:33,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:53:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 10:53:33,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:37,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607139924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:37,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:37,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 10:53:37,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584237592] [2022-11-20 10:53:37,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:37,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 10:53:37,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 10:53:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:53:37,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-20 10:53:37,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 517 flow. Second operand has 37 states, 37 states have (on average 52.972972972972975) internal successors, (1960), 37 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:37,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:37,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-20 10:53:37,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:55,371 INFO L130 PetriNetUnfolder]: 504/1809 cut-off events. [2022-11-20 10:53:55,371 INFO L131 PetriNetUnfolder]: For 2158/2183 co-relation queries the response was YES. [2022-11-20 10:53:55,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4702 conditions, 1809 events. 504/1809 cut-off events. For 2158/2183 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14571 event pairs, 10 based on Foata normal form. 29/1832 useless extension candidates. Maximal degree in co-relation 4686. Up to 168 conditions per place. [2022-11-20 10:53:55,385 INFO L137 encePairwiseOnDemand]: 70/88 looper letters, 219 selfloop transitions, 183 changer transitions 133/583 dead transitions. [2022-11-20 10:53:55,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 583 transitions, 3861 flow [2022-11-20 10:53:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-20 10:53:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-20 10:53:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 5779 transitions. [2022-11-20 10:53:55,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6254329004329005 [2022-11-20 10:53:55,400 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 5779 transitions. [2022-11-20 10:53:55,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 5779 transitions. [2022-11-20 10:53:55,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:55,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 5779 transitions. [2022-11-20 10:53:55,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 55.03809523809524) internal successors, (5779), 105 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 10:53:55,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 88.0) internal successors, (9328), 106 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states 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 10:53:55,439 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 88.0) internal successors, (9328), 106 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states 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 10:53:55,439 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 517 flow. Second operand 105 states and 5779 transitions. [2022-11-20 10:53:55,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 583 transitions, 3861 flow [2022-11-20 10:53:55,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 583 transitions, 3677 flow, removed 86 selfloop flow, removed 9 redundant places. [2022-11-20 10:53:55,485 INFO L231 Difference]: Finished difference. Result has 265 places, 284 transitions, 2188 flow [2022-11-20 10:53:55,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=2188, PETRI_PLACES=265, PETRI_TRANSITIONS=284} [2022-11-20 10:53:55,487 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 187 predicate places. [2022-11-20 10:53:55,487 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 284 transitions, 2188 flow [2022-11-20 10:53:55,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.972972972972975) internal successors, (1960), 37 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:55,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:55,488 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] [2022-11-20 10:53:55,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 10:53:55,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:55,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1966106357, now seen corresponding path program 2 times [2022-11-20 10:53:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:55,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588620501] [2022-11-20 10:53:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:55,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:53:56,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:56,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588620501] [2022-11-20 10:53:56,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588620501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:56,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:56,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:53:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598591803] [2022-11-20 10:53:56,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:53:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:53:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:56,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 10:53:56,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 284 transitions, 2188 flow. Second operand has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 10:53:56,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:56,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 10:53:56,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:56,942 INFO L130 PetriNetUnfolder]: 836/2491 cut-off events. [2022-11-20 10:53:56,942 INFO L131 PetriNetUnfolder]: For 13726/13726 co-relation queries the response was YES. [2022-11-20 10:53:56,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9623 conditions, 2491 events. 836/2491 cut-off events. For 13726/13726 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20044 event pairs, 91 based on Foata normal form. 18/2495 useless extension candidates. Maximal degree in co-relation 9552. Up to 607 conditions per place. [2022-11-20 10:53:56,986 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 306 selfloop transitions, 146 changer transitions 0/504 dead transitions. [2022-11-20 10:53:56,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 504 transitions, 5026 flow [2022-11-20 10:53:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:53:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:53:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 642 transitions. [2022-11-20 10:53:56,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8106060606060606 [2022-11-20 10:53:56,990 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 642 transitions. [2022-11-20 10:53:56,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 642 transitions. [2022-11-20 10:53:56,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:56,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 642 transitions. [2022-11-20 10:53:56,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 71.33333333333333) internal successors, (642), 9 states have internal predecessors, (642), 0 states have call successors, (0), 0 states 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 10:53:56,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:53:56,994 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 10:53:56,994 INFO L175 Difference]: Start difference. First operand has 265 places, 284 transitions, 2188 flow. Second operand 9 states and 642 transitions. [2022-11-20 10:53:56,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 504 transitions, 5026 flow [2022-11-20 10:53:57,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 504 transitions, 4456 flow, removed 278 selfloop flow, removed 48 redundant places. [2022-11-20 10:53:57,088 INFO L231 Difference]: Finished difference. Result has 183 places, 367 transitions, 3093 flow [2022-11-20 10:53:57,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3093, PETRI_PLACES=183, PETRI_TRANSITIONS=367} [2022-11-20 10:53:57,092 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 105 predicate places. [2022-11-20 10:53:57,092 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 367 transitions, 3093 flow [2022-11-20 10:53:57,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 10:53:57,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:57,093 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] [2022-11-20 10:53:57,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:53:57,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:57,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1711414191, now seen corresponding path program 3 times [2022-11-20 10:53:57,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:57,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735708963] [2022-11-20 10:53:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:57,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:57,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:57,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735708963] [2022-11-20 10:53:57,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735708963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:57,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:57,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:53:57,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541837937] [2022-11-20 10:53:57,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:57,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:57,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 10:53:57,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 367 transitions, 3093 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:57,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:57,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 10:53:57,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:58,331 INFO L130 PetriNetUnfolder]: 1215/3169 cut-off events. [2022-11-20 10:53:58,331 INFO L131 PetriNetUnfolder]: For 13034/13034 co-relation queries the response was YES. [2022-11-20 10:53:58,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13195 conditions, 3169 events. 1215/3169 cut-off events. For 13034/13034 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 24382 event pairs, 30 based on Foata normal form. 42/3198 useless extension candidates. Maximal degree in co-relation 13160. Up to 645 conditions per place. [2022-11-20 10:53:58,371 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 509 selfloop transitions, 221 changer transitions 0/782 dead transitions. [2022-11-20 10:53:58,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 782 transitions, 8449 flow [2022-11-20 10:53:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:53:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:53:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2022-11-20 10:53:58,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-11-20 10:53:58,373 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2022-11-20 10:53:58,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2022-11-20 10:53:58,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:58,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2022-11-20 10:53:58,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 10:53:58,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states 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 10:53:58,376 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states 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 10:53:58,377 INFO L175 Difference]: Start difference. First operand has 183 places, 367 transitions, 3093 flow. Second operand 7 states and 496 transitions. [2022-11-20 10:53:58,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 782 transitions, 8449 flow [2022-11-20 10:53:58,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 782 transitions, 8319 flow, removed 65 selfloop flow, removed 2 redundant places. [2022-11-20 10:53:58,530 INFO L231 Difference]: Finished difference. Result has 187 places, 511 transitions, 5653 flow [2022-11-20 10:53:58,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5653, PETRI_PLACES=187, PETRI_TRANSITIONS=511} [2022-11-20 10:53:58,531 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 109 predicate places. [2022-11-20 10:53:58,532 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 511 transitions, 5653 flow [2022-11-20 10:53:58,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:58,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:58,532 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:53:58,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:53:58,533 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:58,534 INFO L85 PathProgramCache]: Analyzing trace with hash 437550740, now seen corresponding path program 2 times [2022-11-20 10:53:58,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:58,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034896174] [2022-11-20 10:53:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:58,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:00,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034896174] [2022-11-20 10:54:00,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034896174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:00,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933291453] [2022-11-20 10:54:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:00,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:00,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:00,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:00,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:54:00,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:00,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:54:00,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:01,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:06,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933291453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:06,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:06,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-11-20 10:54:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292130267] [2022-11-20 10:54:06,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 10:54:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 10:54:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 10:54:06,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-20 10:54:06,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 511 transitions, 5653 flow. Second operand has 39 states, 39 states have (on average 53.1025641025641) internal successors, (2071), 39 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states 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 10:54:06,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:54:06,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-20 10:54:06,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:54:20,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:54:30,497 INFO L130 PetriNetUnfolder]: 1706/4972 cut-off events. [2022-11-20 10:54:30,497 INFO L131 PetriNetUnfolder]: For 24287/24313 co-relation queries the response was YES. [2022-11-20 10:54:30,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22400 conditions, 4972 events. 1706/4972 cut-off events. For 24287/24313 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 45338 event pairs, 39 based on Foata normal form. 31/4986 useless extension candidates. Maximal degree in co-relation 22362. Up to 1093 conditions per place. [2022-11-20 10:54:30,556 INFO L137 encePairwiseOnDemand]: 69/88 looper letters, 590 selfloop transitions, 425 changer transitions 116/1187 dead transitions. [2022-11-20 10:54:30,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1187 transitions, 14919 flow [2022-11-20 10:54:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 10:54:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-11-20 10:54:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4668 transitions. [2022-11-20 10:54:30,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6240641711229946 [2022-11-20 10:54:30,566 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4668 transitions. [2022-11-20 10:54:30,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4668 transitions. [2022-11-20 10:54:30,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:54:30,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4668 transitions. [2022-11-20 10:54:30,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 54.917647058823526) internal successors, (4668), 85 states have internal predecessors, (4668), 0 states have call successors, (0), 0 states 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 10:54:30,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 88.0) internal successors, (7568), 86 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states 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 10:54:30,594 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 88.0) internal successors, (7568), 86 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states 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 10:54:30,594 INFO L175 Difference]: Start difference. First operand has 187 places, 511 transitions, 5653 flow. Second operand 85 states and 4668 transitions. [2022-11-20 10:54:30,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1187 transitions, 14919 flow [2022-11-20 10:54:30,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1187 transitions, 14873 flow, removed 23 selfloop flow, removed 0 redundant places. [2022-11-20 10:54:30,954 INFO L231 Difference]: Finished difference. Result has 320 places, 810 transitions, 11074 flow [2022-11-20 10:54:30,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=11074, PETRI_PLACES=320, PETRI_TRANSITIONS=810} [2022-11-20 10:54:30,956 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 242 predicate places. [2022-11-20 10:54:30,956 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 810 transitions, 11074 flow [2022-11-20 10:54:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 53.1025641025641) internal successors, (2071), 39 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states 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 10:54:30,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:54:30,957 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:54:30,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:31,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:54:31,163 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:54:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1895949534, now seen corresponding path program 3 times [2022-11-20 10:54:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:31,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463150153] [2022-11-20 10:54:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:31,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:34,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:34,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463150153] [2022-11-20 10:54:34,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463150153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:34,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208865308] [2022-11-20 10:54:34,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:34,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:34,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:54:35,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:54:35,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:35,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:54:35,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:37,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:43,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208865308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:43,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:43,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-11-20 10:54:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672992626] [2022-11-20 10:54:43,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 10:54:43,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 10:54:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:54:43,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-20 10:54:43,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 810 transitions, 11074 flow. Second operand has 37 states, 37 states have (on average 51.2972972972973) internal successors, (1898), 37 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states 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 10:54:43,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:54:43,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-20 10:54:43,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:18,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:55:41,235 INFO L130 PetriNetUnfolder]: 2481/6576 cut-off events. [2022-11-20 10:55:41,235 INFO L131 PetriNetUnfolder]: For 51099/51099 co-relation queries the response was YES. [2022-11-20 10:55:41,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36253 conditions, 6576 events. 2481/6576 cut-off events. For 51099/51099 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 60276 event pairs, 63 based on Foata normal form. 20/6587 useless extension candidates. Maximal degree in co-relation 36166. Up to 2105 conditions per place. [2022-11-20 10:55:41,409 INFO L137 encePairwiseOnDemand]: 65/88 looper letters, 831 selfloop transitions, 519 changer transitions 130/1519 dead transitions. [2022-11-20 10:55:41,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1519 transitions, 22367 flow [2022-11-20 10:55:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 10:55:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2022-11-20 10:55:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5291 transitions. [2022-11-20 10:55:41,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.60125 [2022-11-20 10:55:41,447 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5291 transitions. [2022-11-20 10:55:41,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5291 transitions. [2022-11-20 10:55:41,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:41,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5291 transitions. [2022-11-20 10:55:41,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 52.91) internal successors, (5291), 100 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states 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 10:55:41,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 88.0) internal successors, (8888), 101 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states 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 10:55:41,498 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 88.0) internal successors, (8888), 101 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states 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 10:55:41,498 INFO L175 Difference]: Start difference. First operand has 320 places, 810 transitions, 11074 flow. Second operand 100 states and 5291 transitions. [2022-11-20 10:55:41,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1519 transitions, 22367 flow [2022-11-20 10:55:42,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1519 transitions, 21508 flow, removed 398 selfloop flow, removed 36 redundant places. [2022-11-20 10:55:42,357 INFO L231 Difference]: Finished difference. Result has 410 places, 1062 transitions, 16053 flow [2022-11-20 10:55:42,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=10635, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=16053, PETRI_PLACES=410, PETRI_TRANSITIONS=1062} [2022-11-20 10:55:42,361 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 332 predicate places. [2022-11-20 10:55:42,361 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1062 transitions, 16053 flow [2022-11-20 10:55:42,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.2972972972973) internal successors, (1898), 37 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states 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 10:55:42,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:42,365 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:42,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:42,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:42,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:55:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2075819060, now seen corresponding path program 4 times [2022-11-20 10:55:42,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:42,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544949276] [2022-11-20 10:55:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:44,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544949276] [2022-11-20 10:55:44,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544949276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590838489] [2022-11-20 10:55:44,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:55:44,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:44,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:44,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:55:44,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:55:44,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:55:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:46,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:47,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590838489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:47,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:47,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 18] total 47 [2022-11-20 10:55:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495647896] [2022-11-20 10:55:47,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:47,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 10:55:47,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 10:55:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 10:55:47,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-20 10:55:47,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1062 transitions, 16053 flow. Second operand has 47 states, 47 states have (on average 51.0) internal successors, (2397), 47 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states 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 10:55:47,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:47,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-20 10:55:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:42,677 INFO L130 PetriNetUnfolder]: 3492/8998 cut-off events. [2022-11-20 10:56:42,677 INFO L131 PetriNetUnfolder]: For 120972/120972 co-relation queries the response was YES. [2022-11-20 10:56:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61230 conditions, 8998 events. 3492/8998 cut-off events. For 120972/120972 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 85441 event pairs, 110 based on Foata normal form. 22/8999 useless extension candidates. Maximal degree in co-relation 61113. Up to 1393 conditions per place. [2022-11-20 10:56:42,847 INFO L137 encePairwiseOnDemand]: 66/88 looper letters, 702 selfloop transitions, 1267 changer transitions 132/2140 dead transitions. [2022-11-20 10:56:42,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 2140 transitions, 37080 flow [2022-11-20 10:56:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-20 10:56:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2022-11-20 10:56:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 6321 transitions. [2022-11-20 10:56:42,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5985795454545455 [2022-11-20 10:56:42,857 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 6321 transitions. [2022-11-20 10:56:42,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 6321 transitions. [2022-11-20 10:56:42,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:42,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 6321 transitions. [2022-11-20 10:56:42,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 52.675) internal successors, (6321), 120 states have internal predecessors, (6321), 0 states have call successors, (0), 0 states 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 10:56:42,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 88.0) internal successors, (10648), 121 states have internal predecessors, (10648), 0 states have call successors, (0), 0 states 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 10:56:42,887 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 88.0) internal successors, (10648), 121 states have internal predecessors, (10648), 0 states have call successors, (0), 0 states 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 10:56:42,887 INFO L175 Difference]: Start difference. First operand has 410 places, 1062 transitions, 16053 flow. Second operand 120 states and 6321 transitions. [2022-11-20 10:56:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 2140 transitions, 37080 flow [2022-11-20 10:56:44,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 2140 transitions, 35199 flow, removed 807 selfloop flow, removed 48 redundant places. [2022-11-20 10:56:44,505 INFO L231 Difference]: Finished difference. Result has 521 places, 1662 transitions, 30022 flow [2022-11-20 10:56:44,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=15364, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=30022, PETRI_PLACES=521, PETRI_TRANSITIONS=1662} [2022-11-20 10:56:44,507 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 443 predicate places. [2022-11-20 10:56:44,507 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1662 transitions, 30022 flow [2022-11-20 10:56:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 51.0) internal successors, (2397), 47 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states 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 10:56:44,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:44,508 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:44,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:44,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 10:56:44,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:56:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1415772185, now seen corresponding path program 4 times [2022-11-20 10:56:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:44,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313041257] [2022-11-20 10:56:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:46,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:46,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313041257] [2022-11-20 10:56:46,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313041257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:46,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767093653] [2022-11-20 10:56:46,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:56:46,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:46,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:46,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:46,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:56:47,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:56:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 10:56:47,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:48,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:08,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767093653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:08,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:08,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 42 [2022-11-20 10:57:08,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892462552] [2022-11-20 10:57:08,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:08,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 10:57:08,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 10:57:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 10:57:08,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-11-20 10:57:08,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1662 transitions, 30022 flow. Second operand has 42 states, 42 states have (on average 53.166666666666664) internal successors, (2233), 42 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states 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 10:57:08,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:57:08,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-11-20 10:57:08,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:57:19,256 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 122 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:57:37,666 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 156 DAG size of output: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:57:54,244 WARN L233 SmtUtils]: Spent 11.39s on a formula simplification. DAG size of input: 166 DAG size of output: 161 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:57:56,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:59:09,501 INFO L130 PetriNetUnfolder]: 3555/9892 cut-off events. [2022-11-20 10:59:09,501 INFO L131 PetriNetUnfolder]: For 231183/231302 co-relation queries the response was YES. [2022-11-20 10:59:09,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83058 conditions, 9892 events. 3555/9892 cut-off events. For 231183/231302 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 100353 event pairs, 38 based on Foata normal form. 91/9966 useless extension candidates. Maximal degree in co-relation 82898. Up to 2772 conditions per place. [2022-11-20 10:59:09,705 INFO L137 encePairwiseOnDemand]: 69/88 looper letters, 1282 selfloop transitions, 847 changer transitions 164/2436 dead transitions. [2022-11-20 10:59:09,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 2436 transitions, 48607 flow [2022-11-20 10:59:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-20 10:59:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-11-20 10:59:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5686 transitions. [2022-11-20 10:59:09,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.621284965034965 [2022-11-20 10:59:09,714 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5686 transitions. [2022-11-20 10:59:09,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5686 transitions. [2022-11-20 10:59:09,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:59:09,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5686 transitions. [2022-11-20 10:59:09,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 54.67307692307692) internal successors, (5686), 104 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states 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 10:59:09,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 88.0) internal successors, (9240), 105 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states 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 10:59:09,739 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 88.0) internal successors, (9240), 105 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states 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 10:59:09,740 INFO L175 Difference]: Start difference. First operand has 521 places, 1662 transitions, 30022 flow. Second operand 104 states and 5686 transitions. [2022-11-20 10:59:09,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 2436 transitions, 48607 flow [2022-11-20 10:59:13,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2436 transitions, 44792 flow, removed 1828 selfloop flow, removed 47 redundant places. [2022-11-20 10:59:13,365 INFO L231 Difference]: Finished difference. Result has 618 places, 2000 transitions, 37429 flow [2022-11-20 10:59:13,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=27879, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=37429, PETRI_PLACES=618, PETRI_TRANSITIONS=2000} [2022-11-20 10:59:13,367 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 540 predicate places. [2022-11-20 10:59:13,368 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 2000 transitions, 37429 flow [2022-11-20 10:59:13,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 53.166666666666664) internal successors, (2233), 42 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states 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 10:59:13,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:59:13,369 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:13,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:13,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:13,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:59:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1864593807, now seen corresponding path program 5 times [2022-11-20 10:59:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327918334] [2022-11-20 10:59:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:13,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:15,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:15,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327918334] [2022-11-20 10:59:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327918334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078879281] [2022-11-20 10:59:15,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:59:15,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:15,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:15,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:15,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:59:15,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:59:15,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 10:59:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:17,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:23,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078879281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:23,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:23,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 20] total 46 [2022-11-20 10:59:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030862295] [2022-11-20 10:59:23,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:23,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 10:59:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 10:59:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 10:59:23,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-20 10:59:23,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 2000 transitions, 37429 flow. Second operand has 46 states, 46 states have (on average 51.02173913043478) internal successors, (2347), 46 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states 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 10:59:23,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:59:23,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-20 10:59:23,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:00:31,847 INFO L130 PetriNetUnfolder]: 4717/11947 cut-off events. [2022-11-20 11:00:31,848 INFO L131 PetriNetUnfolder]: For 257365/257365 co-relation queries the response was YES. [2022-11-20 11:00:32,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103930 conditions, 11947 events. 4717/11947 cut-off events. For 257365/257365 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 118798 event pairs, 59 based on Foata normal form. 23/11959 useless extension candidates. Maximal degree in co-relation 103735. Up to 3641 conditions per place. [2022-11-20 11:00:32,168 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 1616 selfloop transitions, 1197 changer transitions 183/3035 dead transitions. [2022-11-20 11:00:32,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 3035 transitions, 62014 flow [2022-11-20 11:00:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-20 11:00:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2022-11-20 11:00:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 7243 transitions. [2022-11-20 11:00:32,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6007796947577969 [2022-11-20 11:00:32,182 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 7243 transitions. [2022-11-20 11:00:32,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 7243 transitions. [2022-11-20 11:00:32,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:00:32,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 7243 transitions. [2022-11-20 11:00:32,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 138 states, 137 states have (on average 52.86861313868613) internal successors, (7243), 137 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states 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 11:00:32,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 138 states, 138 states have (on average 88.0) internal successors, (12144), 138 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states 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 11:00:32,227 INFO L81 ComplementDD]: Finished complementDD. Result has 138 states, 138 states have (on average 88.0) internal successors, (12144), 138 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states 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 11:00:32,227 INFO L175 Difference]: Start difference. First operand has 618 places, 2000 transitions, 37429 flow. Second operand 137 states and 7243 transitions. [2022-11-20 11:00:32,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 3035 transitions, 62014 flow [2022-11-20 11:00:37,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 3035 transitions, 59106 flow, removed 882 selfloop flow, removed 57 redundant places. [2022-11-20 11:00:37,402 INFO L231 Difference]: Finished difference. Result has 719 places, 2438 transitions, 48610 flow [2022-11-20 11:00:37,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=35831, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=779, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=48610, PETRI_PLACES=719, PETRI_TRANSITIONS=2438} [2022-11-20 11:00:37,405 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 641 predicate places. [2022-11-20 11:00:37,405 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 2438 transitions, 48610 flow [2022-11-20 11:00:37,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 51.02173913043478) internal successors, (2347), 46 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states 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 11:00:37,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:00:37,406 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:37,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:00:37,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:37,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:00:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash -36015847, now seen corresponding path program 6 times [2022-11-20 11:00:37,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:37,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433933562] [2022-11-20 11:00:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:37,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:39,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:39,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433933562] [2022-11-20 11:00:39,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433933562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:39,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898309280] [2022-11-20 11:00:39,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:00:39,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:39,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:39,765 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:39,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:00:39,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 11:00:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:00:39,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:42,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:46,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898309280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:46,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:00:46,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 46 [2022-11-20 11:00:46,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903991231] [2022-11-20 11:00:46,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:46,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:00:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:00:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:00:46,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-20 11:00:46,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 2438 transitions, 48610 flow. Second operand has 46 states, 46 states have (on average 51.0) internal successors, (2346), 46 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states 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 11:00:46,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:00:46,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-20 11:00:46,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:00:54,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:59,045 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (+ c_~s~0 1)) (.cse6 (* (div c_~t~0 4294967296) 4294967296))) (let ((.cse18 (<= c_~t~0 .cse6)) (.cse4 (+ c_~S~0 c_~T~0)) (.cse10 (* 4294967296 (div .cse9 4294967296))) (.cse15 (* (div (+ c_~s~0 (- 1)) 4294967296) 4294967296)) (.cse8 (* (div (+ c_~S~0 c_~T~0 (- c_~s~0) (- c_~m~0)) 4294967296) 4294967296)) (.cse7 (* (div c_~s~0 4294967296) 4294967296)) (.cse2 (div c_~m~0 4294967296))) (let ((.cse3 (* .cse2 4294967296)) (.cse12 (<= c_~s~0 .cse7)) (.cse16 (<= (+ c_~S~0 c_~T~0 .cse6 .cse10) (+ c_~s~0 c_~t~0 c_~m~0 .cse15 .cse8))) (.cse17 (<= c_~m~0 1)) (.cse11 (<= .cse4 (+ c_~s~0 c_~t~0 c_~m~0))) (.cse5 (not .cse18))) (and (or (< (+ 2 (* (div (+ c_~s~0 (- 2)) 4294967296) 4294967296)) c_~s~0) (and (< (+ (* (div (+ c_~m~0 3) 4294967296) 4294967296) c_~S~0) (+ c_~m~0 (* 4294967296 (div (+ c_~S~0 (- 4294967295)) 4294967296)) 4294967299)) (< (+ c_~m~0 (* (div (+ c_~S~0 1) 4294967296) 4294967296)) (+ c_~S~0 4294967295 (* (div (+ c_~m~0 (- 4294967293)) 4294967296) 4294967296))))) (or (let ((.cse0 (* (div .cse4 4294967296) 4294967296)) (.cse1 (+ c_~S~0 c_~T~0 .cse3))) (and (not (<= (+ c_~m~0 .cse0 1) .cse1)) (<= .cse2 0) (<= (+ c_~m~0 .cse0) .cse1))) (and (<= (div c_thread1Thread1of1ForFork1_~cond~0 256) 0) (<= 1 c_thread1Thread1of1ForFork1_~cond~0))) (or .cse5 (and (<= c_~m~0 2) (or (<= (+ c_~S~0 c_~T~0 .cse6 (* (div (+ c_~s~0 2) 4294967296) 4294967296)) (+ c_~s~0 c_~t~0 c_~m~0 .cse7 .cse8)) (<= .cse9 .cse10)) .cse11 (<= (+ c_~s~0 2 .cse6) .cse4)) .cse12) (or (< 0 (mod c_~t~0 4294967296)) (let ((.cse13 (mod .cse4 4294967296)) (.cse14 (+ c_~m~0 1))) (and (or (< 0 (mod c_~s~0 4294967296)) (and (< c_~m~0 (+ .cse13 .cse3 1)) (< (+ .cse13 .cse3) .cse14))) (or (and (< c_~m~0 (+ .cse13 (* (div (+ c_~m~0 (- 4294967295)) 4294967296) 4294967296) 4294967296)) (< (+ .cse13 (* (div .cse14 4294967296) 4294967296)) (+ c_~m~0 2))) (< (+ .cse15 1) c_~s~0))))) (or .cse12 (and (or .cse16 (<= (+ 4294967295 .cse6) c_~t~0)) .cse17 (<= (+ c_~s~0 c_~t~0 1) .cse4) .cse11)) (or .cse5 .cse12 (and .cse16 .cse17 (<= (+ c_~s~0 .cse6 1) .cse4) .cse11)) (or (and (= c_thread2Thread1of1ForFork0_~cond~1 0) .cse18) (and .cse5 (= c_thread2Thread1of1ForFork0_~cond~1 1))))))) is different from false [2022-11-20 11:02:33,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:03:15,739 INFO L130 PetriNetUnfolder]: 5841/14494 cut-off events. [2022-11-20 11:03:15,739 INFO L131 PetriNetUnfolder]: For 349662/349662 co-relation queries the response was YES. [2022-11-20 11:03:16,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138641 conditions, 14494 events. 5841/14494 cut-off events. For 349662/349662 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 147654 event pairs, 60 based on Foata normal form. 17/14501 useless extension candidates. Maximal degree in co-relation 138419. Up to 4323 conditions per place. [2022-11-20 11:03:16,242 INFO L137 encePairwiseOnDemand]: 67/88 looper letters, 2038 selfloop transitions, 2362 changer transitions 128/4567 dead transitions. [2022-11-20 11:03:16,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 4567 transitions, 101307 flow [2022-11-20 11:03:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-20 11:03:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-11-20 11:03:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 9924 transitions. [2022-11-20 11:03:16,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5935406698564594 [2022-11-20 11:03:16,256 INFO L72 ComplementDD]: Start complementDD. Operand 190 states and 9924 transitions. [2022-11-20 11:03:16,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 190 states and 9924 transitions. [2022-11-20 11:03:16,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:16,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 190 states and 9924 transitions. [2022-11-20 11:03:16,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 191 states, 190 states have (on average 52.23157894736842) internal successors, (9924), 190 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states 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 11:03:16,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 191 states, 191 states have (on average 88.0) internal successors, (16808), 191 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states 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 11:03:16,295 INFO L81 ComplementDD]: Finished complementDD. Result has 191 states, 191 states have (on average 88.0) internal successors, (16808), 191 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states 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 11:03:16,295 INFO L175 Difference]: Start difference. First operand has 719 places, 2438 transitions, 48610 flow. Second operand 190 states and 9924 transitions. [2022-11-20 11:03:16,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 4567 transitions, 101307 flow [2022-11-20 11:03:25,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 794 places, 4567 transitions, 98911 flow, removed 968 selfloop flow, removed 66 redundant places. [2022-11-20 11:03:25,536 INFO L231 Difference]: Finished difference. Result has 870 places, 3808 transitions, 84980 flow [2022-11-20 11:03:25,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=47721, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=190, PETRI_FLOW=84980, PETRI_PLACES=870, PETRI_TRANSITIONS=3808} [2022-11-20 11:03:25,539 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 792 predicate places. [2022-11-20 11:03:25,539 INFO L495 AbstractCegarLoop]: Abstraction has has 870 places, 3808 transitions, 84980 flow [2022-11-20 11:03:25,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 51.0) internal successors, (2346), 46 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states 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 11:03:25,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:25,540 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:03:25,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 11:03:25,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:25,745 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash 887633465, now seen corresponding path program 7 times [2022-11-20 11:03:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:25,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311029304] [2022-11-20 11:03:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:25,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:26,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:26,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311029304] [2022-11-20 11:03:26,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311029304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:26,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25412009] [2022-11-20 11:03:26,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:03:26,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:27,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:27,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:03:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:03:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:29,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:32,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25412009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:32,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:32,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 21] total 49 [2022-11-20 11:03:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268899390] [2022-11-20 11:03:32,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:32,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:03:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:03:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2014, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:03:32,681 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-20 11:03:32,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 870 places, 3808 transitions, 84980 flow. Second operand has 49 states, 49 states have (on average 50.97959183673469) internal successors, (2498), 49 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states 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 11:03:32,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:32,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-20 11:03:32,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:06:16,516 INFO L130 PetriNetUnfolder]: 8421/21261 cut-off events. [2022-11-20 11:06:16,516 INFO L131 PetriNetUnfolder]: For 615449/615449 co-relation queries the response was YES. [2022-11-20 11:06:17,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217831 conditions, 21261 events. 8421/21261 cut-off events. For 615449/615449 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 230900 event pairs, 118 based on Foata normal form. 43/21276 useless extension candidates. Maximal degree in co-relation 217574. Up to 3592 conditions per place. [2022-11-20 11:06:17,698 INFO L137 encePairwiseOnDemand]: 65/88 looper letters, 2123 selfloop transitions, 4755 changer transitions 334/7251 dead transitions. [2022-11-20 11:06:17,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1132 places, 7251 transitions, 176420 flow [2022-11-20 11:06:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2022-11-20 11:06:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2022-11-20 11:06:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 15640 transitions. [2022-11-20 11:06:17,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5964002440512508 [2022-11-20 11:06:17,717 INFO L72 ComplementDD]: Start complementDD. Operand 298 states and 15640 transitions. [2022-11-20 11:06:17,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 298 states and 15640 transitions. [2022-11-20 11:06:17,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:06:17,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 298 states and 15640 transitions. [2022-11-20 11:06:17,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 299 states, 298 states have (on average 52.48322147651007) internal successors, (15640), 298 states have internal predecessors, (15640), 0 states have call successors, (0), 0 states 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 11:06:17,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 299 states, 299 states have (on average 88.0) internal successors, (26312), 299 states have internal predecessors, (26312), 0 states have call successors, (0), 0 states 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 11:06:17,775 INFO L81 ComplementDD]: Finished complementDD. Result has 299 states, 299 states have (on average 88.0) internal successors, (26312), 299 states have internal predecessors, (26312), 0 states have call successors, (0), 0 states 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 11:06:17,775 INFO L175 Difference]: Start difference. First operand has 870 places, 3808 transitions, 84980 flow. Second operand 298 states and 15640 transitions. [2022-11-20 11:06:17,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1132 places, 7251 transitions, 176420 flow [2022-11-20 11:06:40,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1077 places, 7251 transitions, 168012 flow, removed 3949 selfloop flow, removed 55 redundant places. [2022-11-20 11:06:41,071 INFO L231 Difference]: Finished difference. Result has 1247 places, 6191 transitions, 153195 flow [2022-11-20 11:06:41,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=82395, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2693, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=298, PETRI_FLOW=153195, PETRI_PLACES=1247, PETRI_TRANSITIONS=6191} [2022-11-20 11:06:41,076 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 1169 predicate places. [2022-11-20 11:06:41,076 INFO L495 AbstractCegarLoop]: Abstraction has has 1247 places, 6191 transitions, 153195 flow [2022-11-20 11:06:41,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 50.97959183673469) internal successors, (2498), 49 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states 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 11:06:41,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:41,077 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:41,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:41,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:41,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:06:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:41,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1338609017, now seen corresponding path program 8 times [2022-11-20 11:06:41,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:41,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903253467] [2022-11-20 11:06:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:41,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903253467] [2022-11-20 11:06:44,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903253467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:44,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798169839] [2022-11-20 11:06:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:44,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:44,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c821071-c5da-4e88-bb15-15c302fc7f53/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:06:44,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:44,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:06:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:47,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:51,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798169839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:51,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:06:51,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 51 [2022-11-20 11:06:51,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021327407] [2022-11-20 11:06:51,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:51,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 11:06:51,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 11:06:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:06:51,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-11-20 11:06:51,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1247 places, 6191 transitions, 153195 flow. Second operand has 51 states, 51 states have (on average 50.90196078431372) internal successors, (2596), 51 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states 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 11:06:51,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:51,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-11-20 11:06:51,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand