./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu --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 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:24,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:24,652 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:00:24,667 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:24,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:24,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:24,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:24,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:24,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:24,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:24,717 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:24,718 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:24,718 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:24,720 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:24,721 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:00:24,721 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:24,722 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:24,722 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:24,723 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:24,724 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:00:24,724 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:24,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:00:24,725 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:24,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:00:24,726 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:24,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:24,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:24,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:24,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:24,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:24,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:24,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:00:24,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:24,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:24,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:24,733 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:00:24,733 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:24,733 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:24,734 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:24,734 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_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 [2023-11-19 08:00:25,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:25,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:25,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:25,062 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:25,062 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:25,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i [2023-11-19 08:00:28,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:28,546 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:28,546 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i [2023-11-19 08:00:28,576 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/data/7bdc42884/717e499921f448d7b6e8200e34d74c82/FLAG2fc21cc7c [2023-11-19 08:00:28,592 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/data/7bdc42884/717e499921f448d7b6e8200e34d74c82 [2023-11-19 08:00:28,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:28,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:28,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:28,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:28,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:28,607 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:28" (1/1) ... [2023-11-19 08:00:28,608 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3345fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:28, skipping insertion in model container [2023-11-19 08:00:28,609 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:28" (1/1) ... [2023-11-19 08:00:28,675 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:29,257 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_0c89166c-0970-4069-9ef4-2a223ef71350/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-11-19 08:00:29,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:29,327 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:29,380 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_0c89166c-0970-4069-9ef4-2a223ef71350/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-11-19 08:00:29,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:29,497 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:29,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29 WrapperNode [2023-11-19 08:00:29,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:29,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:29,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:29,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:29,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,592 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 205 [2023-11-19 08:00:29,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:29,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:29,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:29,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:29,605 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,621 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,621 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,649 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,653 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:29,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:29,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:29,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:29,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (1/1) ... [2023-11-19 08:00:29,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:29,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:29,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:29,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:00:29,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:29,744 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:00:29,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:29,745 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 08:00:29,745 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 08:00:29,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:29,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:29,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:29,747 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:00:29,923 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:29,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:30,283 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:30,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:30,299 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-11-19 08:00:30,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:30 BoogieIcfgContainer [2023-11-19 08:00:30,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:30,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:30,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:30,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:30,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:28" (1/3) ... [2023-11-19 08:00:30,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d2cf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:30, skipping insertion in model container [2023-11-19 08:00:30,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:29" (2/3) ... [2023-11-19 08:00:30,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d2cf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:30, skipping insertion in model container [2023-11-19 08:00:30,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:30" (3/3) ... [2023-11-19 08:00:30,325 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2023-11-19 08:00:30,335 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:00:30,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:30,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 08:00:30,346 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:00:30,438 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 08:00:30,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 207 transitions, 421 flow [2023-11-19 08:00:30,646 INFO L124 PetriNetUnfolderBase]: 43/282 cut-off events. [2023-11-19 08:00:30,646 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:00:30,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 282 events. 43/282 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 887 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-11-19 08:00:30,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 207 transitions, 421 flow [2023-11-19 08:00:30,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 200 transitions, 404 flow [2023-11-19 08:00:30,672 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:30,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 200 transitions, 404 flow [2023-11-19 08:00:30,684 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 200 transitions, 404 flow [2023-11-19 08:00:30,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 200 transitions, 404 flow [2023-11-19 08:00:30,745 INFO L124 PetriNetUnfolderBase]: 41/275 cut-off events. [2023-11-19 08:00:30,745 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:30,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 275 events. 41/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 868 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-11-19 08:00:30,754 INFO L119 LiptonReduction]: Number of co-enabled transitions 9558 [2023-11-19 08:00:37,980 INFO L134 LiptonReduction]: Checked pairs total: 17432 [2023-11-19 08:00:37,980 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-11-19 08:00:38,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:38,010 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;@4639edfc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:38,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 08:00:38,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:38,016 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-11-19 08:00:38,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:38,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:38,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:00:38,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 08:00:38,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash 750837199, now seen corresponding path program 1 times [2023-11-19 08:00:38,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:38,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823365904] [2023-11-19 08:00:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:38,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:38,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823365904] [2023-11-19 08:00:38,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823365904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:38,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:38,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:38,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106877269] [2023-11-19 08:00:38,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:38,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:38,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-11-19 08:00:38,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:38,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:38,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-11-19 08:00:38,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:38,691 INFO L124 PetriNetUnfolderBase]: 274/651 cut-off events. [2023-11-19 08:00:38,691 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1203 conditions, 651 events. 274/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3566 event pairs, 0 based on Foata normal form. 119/685 useless extension candidates. Maximal degree in co-relation 1175. Up to 529 conditions per place. [2023-11-19 08:00:38,702 INFO L140 encePairwiseOnDemand]: 352/377 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-19 08:00:38,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 224 flow [2023-11-19 08:00:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-11-19 08:00:38,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53315649867374 [2023-11-19 08:00:38,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-11-19 08:00:38,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-11-19 08:00:38,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:38,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-11-19 08:00:38,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:38,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:38,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:38,753 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 132 flow. Second operand 3 states and 603 transitions. [2023-11-19 08:00:38,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 224 flow [2023-11-19 08:00:38,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:38,761 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 96 flow [2023-11-19 08:00:38,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-11-19 08:00:38,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-11-19 08:00:38,769 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 96 flow [2023-11-19 08:00:38,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:38,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:38,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:00:38,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:38,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 08:00:38,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1793944681, now seen corresponding path program 1 times [2023-11-19 08:00:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:38,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369672998] [2023-11-19 08:00:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:38,854 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:38,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:38,927 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:38,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 08:00:38,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 08:00:38,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 08:00:38,932 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 08:00:38,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:38,932 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 08:00:38,935 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:38,935 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:00:38,973 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:00:38,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 268 transitions, 552 flow [2023-11-19 08:00:39,051 INFO L124 PetriNetUnfolderBase]: 72/444 cut-off events. [2023-11-19 08:00:39,051 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:00:39,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 444 events. 72/444 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1740 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 284. Up to 12 conditions per place. [2023-11-19 08:00:39,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 268 transitions, 552 flow [2023-11-19 08:00:39,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 266 transitions, 548 flow [2023-11-19 08:00:39,061 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:39,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 266 transitions, 548 flow [2023-11-19 08:00:39,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 266 transitions, 548 flow [2023-11-19 08:00:39,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 266 transitions, 548 flow [2023-11-19 08:00:39,130 INFO L124 PetriNetUnfolderBase]: 71/442 cut-off events. [2023-11-19 08:00:39,130 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:00:39,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 442 events. 71/442 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1753 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 282. Up to 12 conditions per place. [2023-11-19 08:00:39,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 27376 [2023-11-19 08:00:46,634 INFO L134 LiptonReduction]: Checked pairs total: 53961 [2023-11-19 08:00:46,635 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-11-19 08:00:46,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:46,639 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;@4639edfc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:46,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 08:00:46,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:46,644 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-11-19 08:00:46,644 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:46,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:46,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:00:46,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:00:46,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:46,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1267921203, now seen corresponding path program 1 times [2023-11-19 08:00:46,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:46,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803059731] [2023-11-19 08:00:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:46,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803059731] [2023-11-19 08:00:46,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803059731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:46,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:46,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:46,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565920625] [2023-11-19 08:00:46,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:46,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:46,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:46,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:46,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 481 [2023-11-19 08:00:46,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 99 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:46,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:46,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 481 [2023-11-19 08:00:46,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:48,675 INFO L124 PetriNetUnfolderBase]: 9260/14822 cut-off events. [2023-11-19 08:00:48,676 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-19 08:00:48,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28639 conditions, 14822 events. 9260/14822 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 101588 event pairs, 4140 based on Foata normal form. 3157/15595 useless extension candidates. Maximal degree in co-relation 2306. Up to 13712 conditions per place. [2023-11-19 08:00:48,794 INFO L140 encePairwiseOnDemand]: 446/481 looper letters, 68 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-19 08:00:48,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 324 flow [2023-11-19 08:00:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-11-19 08:00:48,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356895356895357 [2023-11-19 08:00:48,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-11-19 08:00:48,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-11-19 08:00:48,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:48,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-11-19 08:00:48,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,810 INFO L175 Difference]: Start difference. First operand has 67 places, 99 transitions, 214 flow. Second operand 3 states and 773 transitions. [2023-11-19 08:00:48,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 324 flow [2023-11-19 08:00:48,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:48,816 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 162 flow [2023-11-19 08:00:48,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-11-19 08:00:48,818 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-11-19 08:00:48,818 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 162 flow [2023-11-19 08:00:48,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:48,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:48,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:48,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:00:48,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:00:48,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1934934389, now seen corresponding path program 1 times [2023-11-19 08:00:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210890807] [2023-11-19 08:00:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:49,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:49,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210890807] [2023-11-19 08:00:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210890807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:49,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:49,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928421629] [2023-11-19 08:00:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:49,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:00:49,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:00:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:00:49,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 481 [2023-11-19 08:00:49,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:49,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:49,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 481 [2023-11-19 08:00:49,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:51,763 INFO L124 PetriNetUnfolderBase]: 11570/18732 cut-off events. [2023-11-19 08:00:51,763 INFO L125 PetriNetUnfolderBase]: For 792/792 co-relation queries the response was YES. [2023-11-19 08:00:51,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37230 conditions, 18732 events. 11570/18732 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 135900 event pairs, 3479 based on Foata normal form. 0/16440 useless extension candidates. Maximal degree in co-relation 37117. Up to 11515 conditions per place. [2023-11-19 08:00:51,861 INFO L140 encePairwiseOnDemand]: 468/481 looper letters, 119 selfloop transitions, 13 changer transitions 6/152 dead transitions. [2023-11-19 08:00:51,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 152 transitions, 634 flow [2023-11-19 08:00:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:00:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 992 transitions. [2023-11-19 08:00:51,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155925155925156 [2023-11-19 08:00:51,867 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 992 transitions. [2023-11-19 08:00:51,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 992 transitions. [2023-11-19 08:00:51,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:51,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 992 transitions. [2023-11-19 08:00:51,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 481.0) internal successors, (2405), 5 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,881 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 481.0) internal successors, (2405), 5 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,881 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 162 flow. Second operand 4 states and 992 transitions. [2023-11-19 08:00:51,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 152 transitions, 634 flow [2023-11-19 08:00:51,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 152 transitions, 631 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:51,894 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 266 flow [2023-11-19 08:00:51,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2023-11-19 08:00:51,898 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-11-19 08:00:51,898 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 266 flow [2023-11-19 08:00:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:51,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:51,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:51,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:00:51,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:00:51,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1552475812, now seen corresponding path program 1 times [2023-11-19 08:00:51,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725375501] [2023-11-19 08:00:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:52,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725375501] [2023-11-19 08:00:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725375501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468329166] [2023-11-19 08:00:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:52,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:52,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:52,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:52,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468329166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:52,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:52,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-19 08:00:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816213029] [2023-11-19 08:00:52,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:00:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:00:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:00:52,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 481 [2023-11-19 08:00:52,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:52,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 481 [2023-11-19 08:00:52,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:52,838 INFO L124 PetriNetUnfolderBase]: 1403/2652 cut-off events. [2023-11-19 08:00:52,838 INFO L125 PetriNetUnfolderBase]: For 1157/1157 co-relation queries the response was YES. [2023-11-19 08:00:52,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6227 conditions, 2652 events. 1403/2652 cut-off events. For 1157/1157 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16809 event pairs, 151 based on Foata normal form. 313/2865 useless extension candidates. Maximal degree in co-relation 2732. Up to 1690 conditions per place. [2023-11-19 08:00:52,868 INFO L140 encePairwiseOnDemand]: 478/481 looper letters, 92 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2023-11-19 08:00:52,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 103 transitions, 522 flow [2023-11-19 08:00:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1179 transitions. [2023-11-19 08:00:52,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49022869022869026 [2023-11-19 08:00:52,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1179 transitions. [2023-11-19 08:00:52,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1179 transitions. [2023-11-19 08:00:52,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:52,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1179 transitions. [2023-11-19 08:00:52,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 481.0) internal successors, (2886), 6 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,888 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 266 flow. Second operand 5 states and 1179 transitions. [2023-11-19 08:00:52,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 103 transitions, 522 flow [2023-11-19 08:00:52,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 522 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:52,894 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2023-11-19 08:00:52,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-19 08:00:52,895 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-11-19 08:00:52,895 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2023-11-19 08:00:52,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:52,897 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:00:52,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:53,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89166c-0970-4069-9ef4-2a223ef71350/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:53,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:00:53,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2072975048, now seen corresponding path program 1 times [2023-11-19 08:00:53,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:53,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313657579] [2023-11-19 08:00:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:53,138 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:53,167 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:53,168 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:53,168 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 08:00:53,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 08:00:53,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 08:00:53,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 08:00:53,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 08:00:53,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:00:53,169 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 08:00:53,170 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:53,170 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:00:53,214 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:00:53,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 329 transitions, 685 flow [2023-11-19 08:00:53,338 INFO L124 PetriNetUnfolderBase]: 106/641 cut-off events. [2023-11-19 08:00:53,339 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:00:53,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 641 events. 106/641 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2736 event pairs, 1 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2023-11-19 08:00:53,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 329 transitions, 685 flow [2023-11-19 08:00:53,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 327 transitions, 681 flow [2023-11-19 08:00:53,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:53,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 280 places, 327 transitions, 681 flow [2023-11-19 08:00:53,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 280 places, 327 transitions, 681 flow [2023-11-19 08:00:53,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 327 transitions, 681 flow [2023-11-19 08:00:53,469 INFO L124 PetriNetUnfolderBase]: 105/639 cut-off events. [2023-11-19 08:00:53,469 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:00:53,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 639 events. 105/639 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2783 event pairs, 1 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-11-19 08:00:53,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 52038 [2023-11-19 08:01:01,736 INFO L134 LiptonReduction]: Checked pairs total: 105178 [2023-11-19 08:01:01,736 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-11-19 08:01:01,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:01,742 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;@4639edfc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:01,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 08:01:01,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:01,746 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-11-19 08:01:01,751 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:01,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:01,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:01:01,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 08:01:01,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:01,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1884923707, now seen corresponding path program 1 times [2023-11-19 08:01:01,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:01,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817725185] [2023-11-19 08:01:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:01,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:01,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:01,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817725185] [2023-11-19 08:01:01,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817725185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:01,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:01,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:01,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517124896] [2023-11-19 08:01:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:01,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:01,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:01,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:01,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 586 [2023-11-19 08:01:01,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 129 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:01,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:01,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 586 [2023-11-19 08:01:01,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand