./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl --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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:07:30,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:07:30,607 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:07:30,612 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:07:30,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:07:30,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:07:30,665 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:07:30,666 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:07:30,667 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:07:30,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:07:30,677 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:07:30,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:07:30,678 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:07:30,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:07:30,681 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:07:30,682 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:07:30,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:07:30,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:07:30,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:07:30,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:07:30,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:07:30,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:07:30,685 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:07:30,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:07:30,686 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:07:30,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:07:30,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:07:30,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:07:30,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:07:30,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:07:30,691 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:07:30,692 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:07:30,692 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:07:30,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:07:30,692 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:07:30,693 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:07:30,693 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:07:30,693 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:07:30,694 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:07:30,694 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_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2023-11-12 02:07:31,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:07:31,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:07:31,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:07:31,149 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:07:31,150 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:07:31,151 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-12 02:07:34,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:07:34,786 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:07:34,787 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-12 02:07:34,814 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/data/6295907a6/1bd5d9ec4bb847eebac583be675cb85b/FLAG31a93c487 [2023-11-12 02:07:34,829 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/data/6295907a6/1bd5d9ec4bb847eebac583be675cb85b [2023-11-12 02:07:34,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:07:34,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:07:34,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:07:34,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:07:34,844 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:07:34,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:07:34" (1/1) ... [2023-11-12 02:07:34,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e57d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:34, skipping insertion in model container [2023-11-12 02:07:34,848 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:07:34" (1/1) ... [2023-11-12 02:07:34,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:07:35,399 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_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-11-12 02:07:35,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:07:35,440 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:07:35,507 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_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-11-12 02:07:35,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:07:35,600 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:07:35,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35 WrapperNode [2023-11-12 02:07:35,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:07:35,603 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:07:35,603 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:07:35,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:07:35,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,699 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-11-12 02:07:35,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:07:35,701 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:07:35,701 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:07:35,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:07:35,711 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,723 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,746 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:07:35,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:07:35,763 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:07:35,763 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:07:35,764 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (1/1) ... [2023-11-12 02:07:35,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:07:35,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:35,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:07:35,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:07:35,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:07:35,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:07:35,869 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:07:35,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:07:35,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:07:35,870 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:07:35,870 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:07:35,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:07:35,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:07:35,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:07:35,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:07:35,874 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:07:36,055 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:07:36,057 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:07:36,293 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:07:36,303 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:07:36,303 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-12 02:07:36,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:07:36 BoogieIcfgContainer [2023-11-12 02:07:36,306 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:07:36,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:07:36,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:07:36,314 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:07:36,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:07:34" (1/3) ... [2023-11-12 02:07:36,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd3c207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:07:36, skipping insertion in model container [2023-11-12 02:07:36,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:35" (2/3) ... [2023-11-12 02:07:36,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd3c207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:07:36, skipping insertion in model container [2023-11-12 02:07:36,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:07:36" (3/3) ... [2023-11-12 02:07:36,317 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-11-12 02:07:36,328 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:07:36,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:07:36,340 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:07:36,341 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:07:36,405 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:07:36,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 204 flow [2023-11-12 02:07:36,523 INFO L124 PetriNetUnfolderBase]: 14/132 cut-off events. [2023-11-12 02:07:36,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:07:36,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 132 events. 14/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 300 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-11-12 02:07:36,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 204 flow [2023-11-12 02:07:36,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 204 flow [2023-11-12 02:07:36,542 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:07:36,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 204 flow [2023-11-12 02:07:36,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 204 flow [2023-11-12 02:07:36,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 204 flow [2023-11-12 02:07:36,603 INFO L124 PetriNetUnfolderBase]: 14/132 cut-off events. [2023-11-12 02:07:36,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:07:36,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 132 events. 14/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 300 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-11-12 02:07:36,615 INFO L119 LiptonReduction]: Number of co-enabled transitions 2432 [2023-11-12 02:07:40,594 INFO L134 LiptonReduction]: Checked pairs total: 4059 [2023-11-12 02:07:40,595 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-12 02:07:40,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:07:40,621 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;@62136b20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:07:40,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:07:40,626 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:07:40,626 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-12 02:07:40,626 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:07:40,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:40,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:07:40,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:40,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash 12045809, now seen corresponding path program 1 times [2023-11-12 02:07:40,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:40,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449293240] [2023-11-12 02:07:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:40,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:40,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449293240] [2023-11-12 02:07:40,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449293240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:40,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:40,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:07:40,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79154263] [2023-11-12 02:07:40,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:40,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:07:40,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:07:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:07:41,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 186 [2023-11-12 02:07:41,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:41,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:41,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 186 [2023-11-12 02:07:41,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:41,240 INFO L124 PetriNetUnfolderBase]: 63/156 cut-off events. [2023-11-12 02:07:41,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:07:41,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 156 events. 63/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 478 event pairs, 48 based on Foata normal form. 16/152 useless extension candidates. Maximal degree in co-relation 293. Up to 134 conditions per place. [2023-11-12 02:07:41,244 INFO L140 encePairwiseOnDemand]: 174/186 looper letters, 24 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-11-12 02:07:41,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 122 flow [2023-11-12 02:07:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:07:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:07:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-11-12 02:07:41,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197132616487455 [2023-11-12 02:07:41,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-11-12 02:07:41,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-11-12 02:07:41,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:41,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-11-12 02:07:41,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:41,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:41,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:41,295 INFO L175 Difference]: Start difference. First operand has 24 places, 30 transitions, 64 flow. Second operand 3 states and 290 transitions. [2023-11-12 02:07:41,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 122 flow [2023-11-12 02:07:41,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:07:41,300 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 50 flow [2023-11-12 02:07:41,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-11-12 02:07:41,306 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-11-12 02:07:41,307 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 50 flow [2023-11-12 02:07:41,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:41,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:41,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:07:41,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:07:41,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:41,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1317545710, now seen corresponding path program 1 times [2023-11-12 02:07:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:41,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674233573] [2023-11-12 02:07:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:41,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:07:41,370 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:07:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:07:41,458 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:07:41,458 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:07:41,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:07:41,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:07:41,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:07:41,464 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:07:41,469 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:07:41,469 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:07:41,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:07:41,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 276 flow [2023-11-12 02:07:41,574 INFO L124 PetriNetUnfolderBase]: 24/202 cut-off events. [2023-11-12 02:07:41,575 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:07:41,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 202 events. 24/202 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 564 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2023-11-12 02:07:41,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 276 flow [2023-11-12 02:07:41,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 276 flow [2023-11-12 02:07:41,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:07:41,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 276 flow [2023-11-12 02:07:41,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 276 flow [2023-11-12 02:07:41,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 276 flow [2023-11-12 02:07:41,619 INFO L124 PetriNetUnfolderBase]: 24/202 cut-off events. [2023-11-12 02:07:41,620 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:07:41,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 202 events. 24/202 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 564 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2023-11-12 02:07:41,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 6976 [2023-11-12 02:07:45,283 INFO L134 LiptonReduction]: Checked pairs total: 13554 [2023-11-12 02:07:45,283 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-11-12 02:07:45,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:07:45,287 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@62136b20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:07:45,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:07:45,290 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:07:45,290 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-12 02:07:45,290 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:07:45,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:45,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:07:45,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:45,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:45,292 INFO L85 PathProgramCache]: Analyzing trace with hash 20391933, now seen corresponding path program 1 times [2023-11-12 02:07:45,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:45,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56576371] [2023-11-12 02:07:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:45,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:45,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:45,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56576371] [2023-11-12 02:07:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56576371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:45,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:45,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:07:45,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767924945] [2023-11-12 02:07:45,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:45,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:07:45,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:45,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:07:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:07:45,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 238 [2023-11-12 02:07:45,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:45,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:45,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 238 [2023-11-12 02:07:45,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:45,861 INFO L124 PetriNetUnfolderBase]: 1271/2316 cut-off events. [2023-11-12 02:07:45,862 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-12 02:07:45,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4425 conditions, 2316 events. 1271/2316 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13207 event pairs, 560 based on Foata normal form. 320/2416 useless extension candidates. Maximal degree in co-relation 423. Up to 2062 conditions per place. [2023-11-12 02:07:45,880 INFO L140 encePairwiseOnDemand]: 221/238 looper letters, 34 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2023-11-12 02:07:45,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 176 flow [2023-11-12 02:07:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:07:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:07:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-11-12 02:07:45,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364145658263305 [2023-11-12 02:07:45,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-11-12 02:07:45,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-11-12 02:07:45,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:45,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-11-12 02:07:45,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:45,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:45,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:45,894 INFO L175 Difference]: Start difference. First operand has 39 places, 48 transitions, 106 flow. Second operand 3 states and 383 transitions. [2023-11-12 02:07:45,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 176 flow [2023-11-12 02:07:45,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:07:45,897 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 86 flow [2023-11-12 02:07:45,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-12 02:07:45,899 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-11-12 02:07:45,899 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 86 flow [2023-11-12 02:07:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:45,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:45,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:45,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:07:45,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:45,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash 971637805, now seen corresponding path program 1 times [2023-11-12 02:07:45,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:45,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962524388] [2023-11-12 02:07:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:45,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:46,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962524388] [2023-11-12 02:07:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962524388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:46,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557515914] [2023-11-12 02:07:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:46,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:46,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:46,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:46,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:07:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:46,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:07:46,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:46,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:46,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557515914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:46,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:46,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:07:46,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752135559] [2023-11-12 02:07:46,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:46,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:07:46,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:07:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:07:46,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 238 [2023-11-12 02:07:46,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:46,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:46,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 238 [2023-11-12 02:07:46,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:46,571 INFO L124 PetriNetUnfolderBase]: 421/856 cut-off events. [2023-11-12 02:07:46,571 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-11-12 02:07:46,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 856 events. 421/856 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4402 event pairs, 0 based on Foata normal form. 100/956 useless extension candidates. Maximal degree in co-relation 173. Up to 502 conditions per place. [2023-11-12 02:07:46,581 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-12 02:07:46,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2023-11-12 02:07:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:07:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:07:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 588 transitions. [2023-11-12 02:07:46,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2023-11-12 02:07:46,585 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 588 transitions. [2023-11-12 02:07:46,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 588 transitions. [2023-11-12 02:07:46,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:46,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 588 transitions. [2023-11-12 02:07:46,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.6) internal successors, (588), 5 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:46,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:46,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:46,594 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 86 flow. Second operand 5 states and 588 transitions. [2023-11-12 02:07:46,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2023-11-12 02:07:46,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:07:46,597 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-12 02:07:46,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-12 02:07:46,599 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-11-12 02:07:46,599 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-12 02:07:46,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.28571428571429) internal successors, (765), 7 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:46,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:46,600 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:07:46,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:46,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:46,809 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:46,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1789293198, now seen corresponding path program 1 times [2023-11-12 02:07:46,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:46,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847798734] [2023-11-12 02:07:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:07:46,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:07:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:07:46,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:07:46,899 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:07:46,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:07:46,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:07:46,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:07:46,901 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:07:46,902 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:07:46,903 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:07:46,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:07:46,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 350 flow [2023-11-12 02:07:47,000 INFO L124 PetriNetUnfolderBase]: 34/272 cut-off events. [2023-11-12 02:07:47,001 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:07:47,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 830 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-11-12 02:07:47,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 166 transitions, 350 flow [2023-11-12 02:07:47,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 166 transitions, 350 flow [2023-11-12 02:07:47,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:07:47,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 166 transitions, 350 flow [2023-11-12 02:07:47,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 166 transitions, 350 flow [2023-11-12 02:07:47,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 166 transitions, 350 flow [2023-11-12 02:07:47,050 INFO L124 PetriNetUnfolderBase]: 34/272 cut-off events. [2023-11-12 02:07:47,051 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:07:47,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 830 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-11-12 02:07:47,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 13632 [2023-11-12 02:07:50,758 INFO L134 LiptonReduction]: Checked pairs total: 28008 [2023-11-12 02:07:50,758 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-12 02:07:50,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:07:50,778 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;@62136b20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:07:50,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:07:50,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:07:50,782 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-11-12 02:07:50,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:07:50,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:50,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:07:50,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:50,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash 30363685, now seen corresponding path program 1 times [2023-11-12 02:07:50,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:50,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451977976] [2023-11-12 02:07:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:50,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:50,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:50,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451977976] [2023-11-12 02:07:50,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451977976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:50,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:50,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:07:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988712062] [2023-11-12 02:07:50,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:50,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:07:50,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:07:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:07:50,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 291 [2023-11-12 02:07:50,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:50,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:50,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 291 [2023-11-12 02:07:50,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:54,431 INFO L124 PetriNetUnfolderBase]: 17895/26602 cut-off events. [2023-11-12 02:07:54,432 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2023-11-12 02:07:54,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52165 conditions, 26602 events. 17895/26602 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 173682 event pairs, 17081 based on Foata normal form. 4496/29060 useless extension candidates. Maximal degree in co-relation 20257. Up to 25159 conditions per place. [2023-11-12 02:07:54,612 INFO L140 encePairwiseOnDemand]: 268/291 looper letters, 42 selfloop transitions, 2 changer transitions 2/56 dead transitions. [2023-11-12 02:07:54,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 222 flow [2023-11-12 02:07:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:07:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:07:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-11-12 02:07:54,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441008018327605 [2023-11-12 02:07:54,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-11-12 02:07:54,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-11-12 02:07:54,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:54,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-11-12 02:07:54,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:54,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:54,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:54,623 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 150 flow. Second operand 3 states and 475 transitions. [2023-11-12 02:07:54,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 222 flow [2023-11-12 02:07:54,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 220 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-12 02:07:54,629 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 116 flow [2023-11-12 02:07:54,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-11-12 02:07:54,633 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-11-12 02:07:54,633 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 116 flow [2023-11-12 02:07:54,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:54,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:54,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:54,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:07:54,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:54,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash 187334179, now seen corresponding path program 1 times [2023-11-12 02:07:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:54,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557649302] [2023-11-12 02:07:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:54,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:54,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557649302] [2023-11-12 02:07:54,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557649302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:54,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156558550] [2023-11-12 02:07:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:54,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:54,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:54,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:07:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:54,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:07:54,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:54,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:07:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156558550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:54,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:07:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:07:54,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605630612] [2023-11-12 02:07:54,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:54,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:07:54,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:07:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:07:54,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 291 [2023-11-12 02:07:54,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:54,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:07:54,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 291 [2023-11-12 02:07:54,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:07:56,278 INFO L124 PetriNetUnfolderBase]: 6205/10135 cut-off events. [2023-11-12 02:07:56,279 INFO L125 PetriNetUnfolderBase]: For 3438/3438 co-relation queries the response was YES. [2023-11-12 02:07:56,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20294 conditions, 10135 events. 6205/10135 cut-off events. For 3438/3438 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 67858 event pairs, 0 based on Foata normal form. 909/11043 useless extension candidates. Maximal degree in co-relation 2316. Up to 5958 conditions per place. [2023-11-12 02:07:56,369 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-11-12 02:07:56,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 390 flow [2023-11-12 02:07:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:07:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:07:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 887 transitions. [2023-11-12 02:07:56,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080183276059564 [2023-11-12 02:07:56,375 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 887 transitions. [2023-11-12 02:07:56,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 887 transitions. [2023-11-12 02:07:56,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:07:56,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 887 transitions. [2023-11-12 02:07:56,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:56,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:56,388 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:56,388 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 116 flow. Second operand 6 states and 887 transitions. [2023-11-12 02:07:56,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 390 flow [2023-11-12 02:07:56,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:07:56,400 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-12 02:07:56,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-12 02:07:56,401 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-11-12 02:07:56,401 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-12 02:07:56,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:07:56,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:07:56,403 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:07:56,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:56,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ec2180-5d9d-4cbf-9c0c-89ec0f97337a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:07:56,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:07:56,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash 978815058, now seen corresponding path program 1 times [2023-11-12 02:07:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:56,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512550836] [2023-11-12 02:07:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:07:56,632 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:07:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:07:56,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:07:56,665 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:07:56,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:07:56,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:07:56,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:07:56,666 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:07:56,668 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:07:56,668 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:07:56,705 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:07:56,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 426 flow [2023-11-12 02:07:56,859 INFO L124 PetriNetUnfolderBase]: 44/342 cut-off events. [2023-11-12 02:07:56,860 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:07:56,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 342 events. 44/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1099 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2023-11-12 02:07:56,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 199 transitions, 426 flow [2023-11-12 02:07:56,865 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 199 transitions, 426 flow [2023-11-12 02:07:56,865 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:07:56,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 199 transitions, 426 flow [2023-11-12 02:07:56,866 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 199 transitions, 426 flow [2023-11-12 02:07:56,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 426 flow [2023-11-12 02:07:56,915 INFO L124 PetriNetUnfolderBase]: 44/342 cut-off events. [2023-11-12 02:07:56,915 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:07:56,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 342 events. 44/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1099 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2023-11-12 02:07:56,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 22400 [2023-11-12 02:08:00,947 INFO L134 LiptonReduction]: Checked pairs total: 50098 [2023-11-12 02:08:00,947 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-12 02:08:00,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:00,950 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;@62136b20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:00,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:08:00,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:08:00,953 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-12 02:08:00,953 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:00,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:00,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:08:00,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:08:00,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash 42000935, now seen corresponding path program 1 times [2023-11-12 02:08:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:00,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271453459] [2023-11-12 02:08:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:00,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:00,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:00,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271453459] [2023-11-12 02:08:00,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271453459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:00,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463846560] [2023-11-12 02:08:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:01,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 345 [2023-11-12 02:08:01,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:01,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:01,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 345 [2023-11-12 02:08:01,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand