./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:37:37,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:37:37,526 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:37:37,539 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:37:37,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:37:37,578 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:37:37,579 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:37:37,580 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:37:37,581 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:37:37,581 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:37:37,582 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:37:37,582 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:37:37,583 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:37:37,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:37:37,584 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:37:37,585 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:37:37,585 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:37:37,586 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:37:37,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:37:37,587 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:37:37,587 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:37:37,588 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:37:37,589 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:37:37,590 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:37:37,590 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:37:37,591 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:37:37,591 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:37:37,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:37:37,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:37:37,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:37:37,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:37:37,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:37,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:37:37,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:37:37,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:37:37,596 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:37:37,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:37:37,596 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:37:37,597 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:37:37,597 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:37:37,597 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:37:37,598 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:37:37,598 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-23 21:37:37,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:37:37,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:37:37,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:37:37,951 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:37:37,951 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:37:37,952 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-23 21:37:41,057 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:37:41,274 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:37:41,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-23 21:37:41,284 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/data/a86cb3855/429b971a93e44195be42fd7c0eae9f58/FLAGf62158c91 [2023-11-23 21:37:41,303 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/data/a86cb3855/429b971a93e44195be42fd7c0eae9f58 [2023-11-23 21:37:41,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:37:41,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:37:41,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:37:41,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:37:41,322 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:37:41,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef5cfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41, skipping insertion in model container [2023-11-23 21:37:41,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,353 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:37:41,558 WARN L240 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_9d48790a-9869-4c59-8802-2ae1e9285a97/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2973,2986] [2023-11-23 21:37:41,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:37:41,585 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:37:41,610 WARN L240 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_9d48790a-9869-4c59-8802-2ae1e9285a97/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2973,2986] [2023-11-23 21:37:41,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:37:41,623 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:37:41,624 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:37:41,631 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:37:41,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41 WrapperNode [2023-11-23 21:37:41,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:37:41,634 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:37:41,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:37:41,634 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:37:41,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,653 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,683 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 157 [2023-11-23 21:37:41,683 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:37:41,684 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:37:41,684 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:37:41,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:37:41,697 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,702 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,717 INFO L189 HeapSplitter]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2] [2023-11-23 21:37:41,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:37:41,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:37:41,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:37:41,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:37:41,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (1/1) ... [2023-11-23 21:37:41,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:37:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:41,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:37:41,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:37:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:37:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 21:37:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 21:37:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 21:37:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 21:37:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:37:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 21:37:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 21:37:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 21:37:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:37:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 21:37:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 21:37:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 21:37:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 21:37:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 21:37:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 21:37:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:37:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:37:41,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:37:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 21:37:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 21:37:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 21:37:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 21:37:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:37:41,847 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:37:41,977 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:37:41,980 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:37:42,333 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:37:42,653 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:37:42,653 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:37:42,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:37:42 BoogieIcfgContainer [2023-11-23 21:37:42,654 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:37:42,658 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:37:42,658 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:37:42,662 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:37:42,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:37:41" (1/3) ... [2023-11-23 21:37:42,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1b88f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:37:42, skipping insertion in model container [2023-11-23 21:37:42,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:37:41" (2/3) ... [2023-11-23 21:37:42,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1b88f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:37:42, skipping insertion in model container [2023-11-23 21:37:42,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:37:42" (3/3) ... [2023-11-23 21:37:42,667 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-23 21:37:42,678 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 21:37:42,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:37:42,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:37:42,690 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:37:42,765 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 21:37:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2023-11-23 21:37:42,865 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2023-11-23 21:37:42,865 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 21:37:42,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-23 21:37:42,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2023-11-23 21:37:42,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 74 flow [2023-11-23 21:37:42,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:37:42,927 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=LoopHeads, 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;@2bb4de21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:37:42,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 21:37:42,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 21:37:42,953 INFO L124 PetriNetUnfolderBase]: 5/30 cut-off events. [2023-11-23 21:37:42,953 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 21:37:42,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:42,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:42,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:42,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1658882849, now seen corresponding path program 1 times [2023-11-23 21:37:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:42,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913055012] [2023-11-23 21:37:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:43,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:43,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913055012] [2023-11-23 21:37:43,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913055012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:43,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:43,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:37:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104973209] [2023-11-23 21:37:43,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:43,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:37:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:37:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:37:43,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:37:43,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:43,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:37:43,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:43,469 INFO L124 PetriNetUnfolderBase]: 96/199 cut-off events. [2023-11-23 21:37:43,469 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-23 21:37:43,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 199 events. 96/199 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 852 event pairs, 78 based on Foata normal form. 8/169 useless extension candidates. Maximal degree in co-relation 287. Up to 170 conditions per place. [2023-11-23 21:37:43,476 INFO L140 encePairwiseOnDemand]: 33/34 looper letters, 22 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2023-11-23 21:37:43,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 116 flow [2023-11-23 21:37:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:37:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-23 21:37:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 43 transitions. [2023-11-23 21:37:43,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2023-11-23 21:37:43,494 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 43 transitions. [2023-11-23 21:37:43,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 43 transitions. [2023-11-23 21:37:43,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:43,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 43 transitions. [2023-11-23 21:37:43,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,508 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,510 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 74 flow. Second operand 2 states and 43 transitions. [2023-11-23 21:37:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 116 flow [2023-11-23 21:37:43,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 21:37:43,517 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 64 flow [2023-11-23 21:37:43,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-11-23 21:37:43,525 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-23 21:37:43,526 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 64 flow [2023-11-23 21:37:43,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:43,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:37:43,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:43,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2052383742, now seen corresponding path program 1 times [2023-11-23 21:37:43,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:43,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344185898] [2023-11-23 21:37:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:43,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:43,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344185898] [2023-11-23 21:37:43,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344185898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:43,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:43,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:37:43,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550300996] [2023-11-23 21:37:43,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:43,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:37:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:37:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:37:43,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:37:43,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:43,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:37:43,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:43,948 INFO L124 PetriNetUnfolderBase]: 160/316 cut-off events. [2023-11-23 21:37:43,948 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-23 21:37:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 316 events. 160/316 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1399 event pairs, 51 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 596. Up to 157 conditions per place. [2023-11-23 21:37:43,952 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 34 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2023-11-23 21:37:43,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 179 flow [2023-11-23 21:37:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:37:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:37:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-23 21:37:43,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2023-11-23 21:37:43,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-23 21:37:43,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-23 21:37:43,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:43,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-23 21:37:43,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,959 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 64 flow. Second operand 3 states and 70 transitions. [2023-11-23 21:37:43,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 179 flow [2023-11-23 21:37:43,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 21:37:43,962 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 76 flow [2023-11-23 21:37:43,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-23 21:37:43,963 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-11-23 21:37:43,963 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 76 flow [2023-11-23 21:37:43,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:43,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:43,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:43,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:37:43,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:43,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash -870829824, now seen corresponding path program 1 times [2023-11-23 21:37:43,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:43,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847086016] [2023-11-23 21:37:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:43,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847086016] [2023-11-23 21:37:44,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847086016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:44,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:44,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:37:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871243585] [2023-11-23 21:37:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:44,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:44,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:37:44,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:44,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:37:44,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:44,333 INFO L124 PetriNetUnfolderBase]: 193/385 cut-off events. [2023-11-23 21:37:44,333 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-23 21:37:44,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 385 events. 193/385 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1901 event pairs, 148 based on Foata normal form. 17/365 useless extension candidates. Maximal degree in co-relation 794. Up to 276 conditions per place. [2023-11-23 21:37:44,341 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 2 changer transitions 13/45 dead transitions. [2023-11-23 21:37:44,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 182 flow [2023-11-23 21:37:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 21:37:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2023-11-23 21:37:44,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5735294117647058 [2023-11-23 21:37:44,346 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 78 transitions. [2023-11-23 21:37:44,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 78 transitions. [2023-11-23 21:37:44,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:44,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 78 transitions. [2023-11-23 21:37:44,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,352 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,352 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 76 flow. Second operand 4 states and 78 transitions. [2023-11-23 21:37:44,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 182 flow [2023-11-23 21:37:44,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:37:44,360 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 90 flow [2023-11-23 21:37:44,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-23 21:37:44,361 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-11-23 21:37:44,361 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 90 flow [2023-11-23 21:37:44,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:44,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:37:44,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:44,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1787168473, now seen corresponding path program 1 times [2023-11-23 21:37:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:44,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126831244] [2023-11-23 21:37:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:44,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:37:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126831244] [2023-11-23 21:37:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126831244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:44,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:44,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:37:44,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838952813] [2023-11-23 21:37:44,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:44,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:44,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:44,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:44,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2023-11-23 21:37:44,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:44,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2023-11-23 21:37:44,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:44,929 INFO L124 PetriNetUnfolderBase]: 256/497 cut-off events. [2023-11-23 21:37:44,929 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-11-23 21:37:44,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 497 events. 256/497 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2063 event pairs, 55 based on Foata normal form. 18/472 useless extension candidates. Maximal degree in co-relation 1019. Up to 302 conditions per place. [2023-11-23 21:37:44,933 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 38 selfloop transitions, 6 changer transitions 8/58 dead transitions. [2023-11-23 21:37:44,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 253 flow [2023-11-23 21:37:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 21:37:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2023-11-23 21:37:44,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2023-11-23 21:37:44,938 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 83 transitions. [2023-11-23 21:37:44,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 83 transitions. [2023-11-23 21:37:44,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:44,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 83 transitions. [2023-11-23 21:37:44,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,942 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,942 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 90 flow. Second operand 4 states and 83 transitions. [2023-11-23 21:37:44,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 253 flow [2023-11-23 21:37:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 249 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 21:37:44,948 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 123 flow [2023-11-23 21:37:44,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-11-23 21:37:44,950 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-11-23 21:37:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 123 flow [2023-11-23 21:37:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:44,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:44,952 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-11-23 21:37:44,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:37:44,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:44,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:44,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1953381751, now seen corresponding path program 1 times [2023-11-23 21:37:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:44,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448691067] [2023-11-23 21:37:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:37:45,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:45,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448691067] [2023-11-23 21:37:45,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448691067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570845212] [2023-11-23 21:37:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:45,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:45,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:45,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:45,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:37:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:45,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 21:37:45,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:45,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 21:37:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:45,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:46,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2023-11-23 21:37:46,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:46,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2023-11-23 21:37:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570845212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:46,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:46,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2023-11-23 21:37:46,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528260880] [2023-11-23 21:37:46,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:46,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:37:46,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:37:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:37:46,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2023-11-23 21:37:46,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 123 flow. Second operand has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:46,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:46,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2023-11-23 21:37:46,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:48,821 INFO L124 PetriNetUnfolderBase]: 1276/2548 cut-off events. [2023-11-23 21:37:48,822 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2023-11-23 21:37:48,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5732 conditions, 2548 events. 1276/2548 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16613 event pairs, 150 based on Foata normal form. 72/2385 useless extension candidates. Maximal degree in co-relation 5723. Up to 337 conditions per place. [2023-11-23 21:37:48,836 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 118 selfloop transitions, 46 changer transitions 212/382 dead transitions. [2023-11-23 21:37:48,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 382 transitions, 1840 flow [2023-11-23 21:37:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-23 21:37:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-23 21:37:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 720 transitions. [2023-11-23 21:37:48,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2023-11-23 21:37:48,841 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 720 transitions. [2023-11-23 21:37:48,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 720 transitions. [2023-11-23 21:37:48,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:48,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 720 transitions. [2023-11-23 21:37:48,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 17.142857142857142) internal successors, (720), 42 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:48,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 34.0) internal successors, (1462), 43 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:48,851 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 34.0) internal successors, (1462), 43 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:48,851 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 123 flow. Second operand 42 states and 720 transitions. [2023-11-23 21:37:48,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 382 transitions, 1840 flow [2023-11-23 21:37:48,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 382 transitions, 1840 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 21:37:48,862 INFO L231 Difference]: Finished difference. Result has 111 places, 75 transitions, 530 flow [2023-11-23 21:37:48,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=530, PETRI_PLACES=111, PETRI_TRANSITIONS=75} [2023-11-23 21:37:48,863 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 78 predicate places. [2023-11-23 21:37:48,864 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 75 transitions, 530 flow [2023-11-23 21:37:48,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:48,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:48,864 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-11-23 21:37:48,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:37:49,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:49,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:49,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash -419275172, now seen corresponding path program 1 times [2023-11-23 21:37:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:49,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939086112] [2023-11-23 21:37:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:37:49,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:49,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939086112] [2023-11-23 21:37:49,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939086112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:49,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:49,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:37:49,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430933710] [2023-11-23 21:37:49,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:49,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:37:49,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:37:49,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:37:49,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2023-11-23 21:37:49,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 75 transitions, 530 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:49,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:49,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2023-11-23 21:37:49,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:49,533 INFO L124 PetriNetUnfolderBase]: 642/1246 cut-off events. [2023-11-23 21:37:49,533 INFO L125 PetriNetUnfolderBase]: For 6842/6842 co-relation queries the response was YES. [2023-11-23 21:37:49,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4505 conditions, 1246 events. 642/1246 cut-off events. For 6842/6842 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7095 event pairs, 394 based on Foata normal form. 8/1203 useless extension candidates. Maximal degree in co-relation 4466. Up to 1023 conditions per place. [2023-11-23 21:37:49,548 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 70 selfloop transitions, 2 changer transitions 2/80 dead transitions. [2023-11-23 21:37:49,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 80 transitions, 692 flow [2023-11-23 21:37:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:37:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:37:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-23 21:37:49,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2023-11-23 21:37:49,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-23 21:37:49,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-23 21:37:49,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:49,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-23 21:37:49,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:49,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:49,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:49,551 INFO L175 Difference]: Start difference. First operand has 111 places, 75 transitions, 530 flow. Second operand 3 states and 61 transitions. [2023-11-23 21:37:49,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 80 transitions, 692 flow [2023-11-23 21:37:49,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 558 flow, removed 62 selfloop flow, removed 21 redundant places. [2023-11-23 21:37:49,592 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 338 flow [2023-11-23 21:37:49,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2023-11-23 21:37:49,596 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2023-11-23 21:37:49,596 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 338 flow [2023-11-23 21:37:49,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:49,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:49,597 INFO L208 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] [2023-11-23 21:37:49,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:37:49,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:49,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash -669384441, now seen corresponding path program 2 times [2023-11-23 21:37:49,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:49,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681011679] [2023-11-23 21:37:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:49,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:37:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:49,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681011679] [2023-11-23 21:37:49,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681011679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:49,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329310689] [2023-11-23 21:37:49,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:37:49,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:49,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:49,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:37:49,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:37:49,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:37:49,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:37:49,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:50,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329310689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:50,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-23 21:37:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46200548] [2023-11-23 21:37:50,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:50,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:37:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:37:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:37:50,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:37:50,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 338 flow. Second operand has 16 states, 16 states have (on average 13.1875) internal successors, (211), 16 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:50,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:50,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:37:50,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:50,872 INFO L124 PetriNetUnfolderBase]: 538/1138 cut-off events. [2023-11-23 21:37:50,872 INFO L125 PetriNetUnfolderBase]: For 1938/1938 co-relation queries the response was YES. [2023-11-23 21:37:50,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3232 conditions, 1138 events. 538/1138 cut-off events. For 1938/1938 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6710 event pairs, 257 based on Foata normal form. 18/1077 useless extension candidates. Maximal degree in co-relation 3210. Up to 598 conditions per place. [2023-11-23 21:37:50,882 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 53/106 dead transitions. [2023-11-23 21:37:50,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 690 flow [2023-11-23 21:37:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:37:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-23 21:37:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2023-11-23 21:37:50,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2023-11-23 21:37:50,885 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 162 transitions. [2023-11-23 21:37:50,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 162 transitions. [2023-11-23 21:37:50,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:50,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 162 transitions. [2023-11-23 21:37:50,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:50,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 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) [2023-11-23 21:37:50,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 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) [2023-11-23 21:37:50,888 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 338 flow. Second operand 9 states and 162 transitions. [2023-11-23 21:37:50,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 690 flow [2023-11-23 21:37:50,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 687 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:37:50,900 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 278 flow [2023-11-23 21:37:50,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2023-11-23 21:37:50,902 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 50 predicate places. [2023-11-23 21:37:50,902 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 278 flow [2023-11-23 21:37:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.1875) internal successors, (211), 16 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:50,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:50,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:50,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:51,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:51,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:51,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash -572103158, now seen corresponding path program 3 times [2023-11-23 21:37:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:51,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645803527] [2023-11-23 21:37:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:51,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:51,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645803527] [2023-11-23 21:37:51,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645803527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:51,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336991162] [2023-11-23 21:37:51,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:37:51,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:51,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:51,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:51,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:37:51,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:37:51,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:37:51,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:37:51,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:51,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:37:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336991162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:51,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:51,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2023-11-23 21:37:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539650235] [2023-11-23 21:37:51,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:37:51,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:37:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:37:51,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2023-11-23 21:37:51,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 53 transitions, 278 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:51,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:51,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2023-11-23 21:37:51,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:52,266 INFO L124 PetriNetUnfolderBase]: 1095/2164 cut-off events. [2023-11-23 21:37:52,266 INFO L125 PetriNetUnfolderBase]: For 5725/5731 co-relation queries the response was YES. [2023-11-23 21:37:52,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6754 conditions, 2164 events. 1095/2164 cut-off events. For 5725/5731 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12843 event pairs, 109 based on Foata normal form. 96/2131 useless extension candidates. Maximal degree in co-relation 6728. Up to 349 conditions per place. [2023-11-23 21:37:52,290 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 124 selfloop transitions, 28 changer transitions 15/174 dead transitions. [2023-11-23 21:37:52,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 174 transitions, 1319 flow [2023-11-23 21:37:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:37:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 21:37:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2023-11-23 21:37:52,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911764705882353 [2023-11-23 21:37:52,292 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 201 transitions. [2023-11-23 21:37:52,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 201 transitions. [2023-11-23 21:37:52,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:52,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 201 transitions. [2023-11-23 21:37:52,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:52,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:52,295 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:52,296 INFO L175 Difference]: Start difference. First operand has 83 places, 53 transitions, 278 flow. Second operand 10 states and 201 transitions. [2023-11-23 21:37:52,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 174 transitions, 1319 flow [2023-11-23 21:37:52,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 174 transitions, 1127 flow, removed 93 selfloop flow, removed 12 redundant places. [2023-11-23 21:37:52,317 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 578 flow [2023-11-23 21:37:52,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=578, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2023-11-23 21:37:52,320 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2023-11-23 21:37:52,321 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 578 flow [2023-11-23 21:37:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:52,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:52,321 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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] [2023-11-23 21:37:52,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:52,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:52,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:52,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1181630422, now seen corresponding path program 4 times [2023-11-23 21:37:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:52,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281718337] [2023-11-23 21:37:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:54,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:54,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281718337] [2023-11-23 21:37:54,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281718337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:54,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682162682] [2023-11-23 21:37:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:37:54,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:54,132 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:54,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:37:54,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:37:54,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:37:54,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:37:54,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:37:54,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:54,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:54,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-11-23 21:37:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:37:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682162682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:54,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:37:54,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 18 [2023-11-23 21:37:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844850999] [2023-11-23 21:37:54,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:37:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:37:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:37:54,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:37:54,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 578 flow. Second operand has 19 states, 19 states have (on average 13.210526315789474) internal successors, (251), 19 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:54,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:54,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:37:54,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:55,813 INFO L124 PetriNetUnfolderBase]: 1222/2635 cut-off events. [2023-11-23 21:37:55,813 INFO L125 PetriNetUnfolderBase]: For 5586/5628 co-relation queries the response was YES. [2023-11-23 21:37:55,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8445 conditions, 2635 events. 1222/2635 cut-off events. For 5586/5628 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17321 event pairs, 398 based on Foata normal form. 11/2508 useless extension candidates. Maximal degree in co-relation 8423. Up to 1028 conditions per place. [2023-11-23 21:37:55,839 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 101 selfloop transitions, 35 changer transitions 37/183 dead transitions. [2023-11-23 21:37:55,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 183 transitions, 1510 flow [2023-11-23 21:37:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:37:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 21:37:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2023-11-23 21:37:55,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894957983193277 [2023-11-23 21:37:55,841 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 233 transitions. [2023-11-23 21:37:55,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 233 transitions. [2023-11-23 21:37:55,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:55,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 233 transitions. [2023-11-23 21:37:55,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 34.0) internal successors, (510), 15 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,845 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 34.0) internal successors, (510), 15 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,845 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 578 flow. Second operand 14 states and 233 transitions. [2023-11-23 21:37:55,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 183 transitions, 1510 flow [2023-11-23 21:37:55,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 183 transitions, 1454 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-11-23 21:37:55,885 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 797 flow [2023-11-23 21:37:55,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=797, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2023-11-23 21:37:55,887 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2023-11-23 21:37:55,887 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 797 flow [2023-11-23 21:37:55,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.210526315789474) internal successors, (251), 19 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:55,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:55,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:55,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:56,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:56,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:56,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -242110408, now seen corresponding path program 5 times [2023-11-23 21:37:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148385363] [2023-11-23 21:37:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:56,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:37:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:56,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148385363] [2023-11-23 21:37:56,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148385363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:56,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:56,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:56,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709628103] [2023-11-23 21:37:56,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:56,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:56,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:37:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:56,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2023-11-23 21:37:56,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 797 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:56,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:56,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2023-11-23 21:37:56,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:57,092 INFO L124 PetriNetUnfolderBase]: 1896/3820 cut-off events. [2023-11-23 21:37:57,093 INFO L125 PetriNetUnfolderBase]: For 11698/11788 co-relation queries the response was YES. [2023-11-23 21:37:57,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12721 conditions, 3820 events. 1896/3820 cut-off events. For 11698/11788 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 25049 event pairs, 402 based on Foata normal form. 232/3851 useless extension candidates. Maximal degree in co-relation 12695. Up to 1854 conditions per place. [2023-11-23 21:37:57,129 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 110 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2023-11-23 21:37:57,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 120 transitions, 1237 flow [2023-11-23 21:37:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:37:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 21:37:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2023-11-23 21:37:57,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-23 21:37:57,131 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 68 transitions. [2023-11-23 21:37:57,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 68 transitions. [2023-11-23 21:37:57,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:57,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 68 transitions. [2023-11-23 21:37:57,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,132 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,132 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 797 flow. Second operand 4 states and 68 transitions. [2023-11-23 21:37:57,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 120 transitions, 1237 flow [2023-11-23 21:37:57,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 1170 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-23 21:37:57,162 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 743 flow [2023-11-23 21:37:57,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=743, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2023-11-23 21:37:57,163 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2023-11-23 21:37:57,163 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 743 flow [2023-11-23 21:37:57,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:57,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:57,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-11-23 21:37:57,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:37:57,164 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:37:57,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1292515623, now seen corresponding path program 1 times [2023-11-23 21:37:57,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:37:57,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152505515] [2023-11-23 21:37:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:57,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:37:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:37:58,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152505515] [2023-11-23 21:37:58,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152505515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:37:58,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335493215] [2023-11-23 21:37:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:58,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:37:58,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:37:58,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:37:58,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:37:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:58,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 21:37:58,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:59,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:59,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:37:59,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2023-11-23 21:38:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:00,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335493215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:00,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:38:00,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2023-11-23 21:38:00,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077746204] [2023-11-23 21:38:00,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:00,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-23 21:38:00,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-23 21:38:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 21:38:00,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:38:00,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 743 flow. Second operand has 35 states, 35 states have (on average 12.085714285714285) internal successors, (423), 35 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:00,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:00,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:38:00,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:05,091 INFO L124 PetriNetUnfolderBase]: 4099/9100 cut-off events. [2023-11-23 21:38:05,092 INFO L125 PetriNetUnfolderBase]: For 24863/25063 co-relation queries the response was YES. [2023-11-23 21:38:05,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30128 conditions, 9100 events. 4099/9100 cut-off events. For 24863/25063 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 74708 event pairs, 823 based on Foata normal form. 101/8632 useless extension candidates. Maximal degree in co-relation 30100. Up to 1858 conditions per place. [2023-11-23 21:38:05,193 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 205 selfloop transitions, 166 changer transitions 180/562 dead transitions. [2023-11-23 21:38:05,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 562 transitions, 4639 flow [2023-11-23 21:38:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 21:38:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-23 21:38:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 794 transitions. [2023-11-23 21:38:05,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307486631016043 [2023-11-23 21:38:05,202 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 794 transitions. [2023-11-23 21:38:05,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 794 transitions. [2023-11-23 21:38:05,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:05,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 794 transitions. [2023-11-23 21:38:05,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 18.045454545454547) internal successors, (794), 44 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 34.0) internal successors, (1530), 45 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,216 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 34.0) internal successors, (1530), 45 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,217 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 743 flow. Second operand 44 states and 794 transitions. [2023-11-23 21:38:05,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 562 transitions, 4639 flow [2023-11-23 21:38:05,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 562 transitions, 4613 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-23 21:38:05,339 INFO L231 Difference]: Finished difference. Result has 150 places, 230 transitions, 2775 flow [2023-11-23 21:38:05,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2775, PETRI_PLACES=150, PETRI_TRANSITIONS=230} [2023-11-23 21:38:05,340 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 117 predicate places. [2023-11-23 21:38:05,340 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 230 transitions, 2775 flow [2023-11-23 21:38:05,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 12.085714285714285) internal successors, (423), 35 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:05,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:05,341 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-11-23 21:38:05,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:05,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:38:05,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:38:05,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1891716151, now seen corresponding path program 2 times [2023-11-23 21:38:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213789748] [2023-11-23 21:38:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:07,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213789748] [2023-11-23 21:38:07,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213789748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:38:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891654047] [2023-11-23 21:38:07,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:38:07,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:07,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:07,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:38:07,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:38:07,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:38:07,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 21:38:07,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:07,932 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-23 21:38:07,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2023-11-23 21:38:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:07,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:08,603 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-23 21:38:08,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2023-11-23 21:38:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891654047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:09,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:38:09,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2023-11-23 21:38:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542556981] [2023-11-23 21:38:09,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:09,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-23 21:38:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:09,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-23 21:38:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:38:09,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:38:09,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 230 transitions, 2775 flow. Second operand has 33 states, 33 states have (on average 12.151515151515152) internal successors, (401), 33 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:09,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:09,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:38:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:38:17,273 INFO L124 PetriNetUnfolderBase]: 5135/11241 cut-off events. [2023-11-23 21:38:17,273 INFO L125 PetriNetUnfolderBase]: For 83281/83495 co-relation queries the response was YES. [2023-11-23 21:38:17,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46199 conditions, 11241 events. 5135/11241 cut-off events. For 83281/83495 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 93388 event pairs, 1649 based on Foata normal form. 68/10622 useless extension candidates. Maximal degree in co-relation 46152. Up to 4624 conditions per place. [2023-11-23 21:38:17,418 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 263 selfloop transitions, 191 changer transitions 152/617 dead transitions. [2023-11-23 21:38:17,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 617 transitions, 6837 flow [2023-11-23 21:38:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-23 21:38:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-23 21:38:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 700 transitions. [2023-11-23 21:38:17,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564387917329093 [2023-11-23 21:38:17,422 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 700 transitions. [2023-11-23 21:38:17,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 700 transitions. [2023-11-23 21:38:17,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:38:17,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 700 transitions. [2023-11-23 21:38:17,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 18.91891891891892) internal successors, (700), 37 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:17,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 34.0) internal successors, (1292), 38 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:17,429 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 34.0) internal successors, (1292), 38 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:17,429 INFO L175 Difference]: Start difference. First operand has 150 places, 230 transitions, 2775 flow. Second operand 37 states and 700 transitions. [2023-11-23 21:38:17,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 617 transitions, 6837 flow [2023-11-23 21:38:17,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 617 transitions, 6288 flow, removed 260 selfloop flow, removed 8 redundant places. [2023-11-23 21:38:17,976 INFO L231 Difference]: Finished difference. Result has 195 places, 321 transitions, 4266 flow [2023-11-23 21:38:17,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4266, PETRI_PLACES=195, PETRI_TRANSITIONS=321} [2023-11-23 21:38:17,977 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 162 predicate places. [2023-11-23 21:38:17,977 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 321 transitions, 4266 flow [2023-11-23 21:38:17,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 12.151515151515152) internal successors, (401), 33 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:17,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:38:17,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:38:18,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:38:18,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:38:18,200 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:38:18,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:38:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 710729198, now seen corresponding path program 3 times [2023-11-23 21:38:18,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:38:18,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94331189] [2023-11-23 21:38:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:38:18,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:38:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:38:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:38:20,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:38:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94331189] [2023-11-23 21:38:20,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94331189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:38:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958651829] [2023-11-23 21:38:20,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:38:20,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:38:20,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:38:20,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:38:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d48790a-9869-4c59-8802-2ae1e9285a97/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:38:20,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:38:20,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:38:20,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 21:38:20,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:38:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:38:21,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:38:21,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:38:21,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2023-11-23 21:38:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:38:21,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958651829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:38:21,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:38:21,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 27 [2023-11-23 21:38:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238433127] [2023-11-23 21:38:21,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:38:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 21:38:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:38:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 21:38:21,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:38:21,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-23 21:38:21,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 321 transitions, 4266 flow. Second operand has 28 states, 28 states have (on average 12.642857142857142) internal successors, (354), 28 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:38:21,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:38:21,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-23 21:38:21,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand