./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU --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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:55:41,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:55:41,982 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:55:41,988 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:55:41,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:55:42,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:55:42,032 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:55:42,033 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:55:42,034 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:55:42,034 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:55:42,035 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:55:42,035 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:55:42,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:55:42,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:55:42,039 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:55:42,040 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:55:42,040 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:55:42,041 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:55:42,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:55:42,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:55:42,045 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:55:42,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:55:42,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:55:42,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:55:42,046 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:55:42,047 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:55:42,047 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:55:42,061 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:55:42,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:55:42,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:55:42,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:55:42,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:55:42,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:42,066 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:55:42,067 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:55:42,067 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:55:42,067 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:55:42,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:55:42,068 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:55:42,068 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:55:42,069 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:55:42,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:55:42,070 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_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2024-10-31 21:55:42,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:55:42,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:55:42,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:55:42,443 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:55:42,444 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:55:42,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c Unable to find full path for "g++" [2024-10-31 21:55:44,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:55:44,741 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:55:44,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-10-31 21:55:44,754 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/data/3c8210ee7/df42b9947322400bb16c5f2c588e41a5/FLAGdead2d4bc [2024-10-31 21:55:44,774 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/data/3c8210ee7/df42b9947322400bb16c5f2c588e41a5 [2024-10-31 21:55:44,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:55:44,779 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:55:44,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:44,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:55:44,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:55:44,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:44" (1/1) ... [2024-10-31 21:55:44,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e76869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:44, skipping insertion in model container [2024-10-31 21:55:44,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:44" (1/1) ... [2024-10-31 21:55:44,818 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:55:45,049 WARN L251 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_4d2a295f-dbae-4b24-8731-d537393799e2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-10-31 21:55:45,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:45,065 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:55:45,090 WARN L251 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_4d2a295f-dbae-4b24-8731-d537393799e2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-10-31 21:55:45,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:45,117 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:55:45,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45 WrapperNode [2024-10-31 21:55:45,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:45,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:45,121 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:55:45,121 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:55:45,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,156 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-10-31 21:55:45,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:45,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:55:45,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:55:45,158 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:55:45,170 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,172 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,185 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 21:55:45,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,195 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,196 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:55:45,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:55:45,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:55:45,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:55:45,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (1/1) ... [2024-10-31 21:55:45,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:45,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:55:45,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:55:45,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:55:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:55:45,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:55:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:55:45,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:55:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:55:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 21:55:45,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 21:55:45,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:55:45,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:55:45,283 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:55:45,388 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:55:45,389 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:55:45,591 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:55:45,591 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:55:45,809 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:55:45,809 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:55:45,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:45 BoogieIcfgContainer [2024-10-31 21:55:45,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:55:45,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:55:45,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:55:45,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:55:45,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:55:44" (1/3) ... [2024-10-31 21:55:45,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7966902a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:45, skipping insertion in model container [2024-10-31 21:55:45,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:45" (2/3) ... [2024-10-31 21:55:45,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7966902a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:45, skipping insertion in model container [2024-10-31 21:55:45,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:45" (3/3) ... [2024-10-31 21:55:45,825 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-10-31 21:55:45,840 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:55:45,841 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:55:45,841 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:55:45,879 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 21:55:45,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-31 21:55:45,965 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-31 21:55:45,965 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 21:55:45,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-31 21:55:45,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-31 21:55:45,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-31 21:55:45,990 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:55:46,001 INFO L333 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, 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;@169dbcb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:55:46,002 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 21:55:46,034 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:55:46,038 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-31 21:55:46,038 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 21:55:46,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:46,043 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:46,043 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:55:46,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:46,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1126928125, now seen corresponding path program 1 times [2024-10-31 21:55:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:46,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132499649] [2024-10-31 21:55:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:46,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:46,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132499649] [2024-10-31 21:55:46,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132499649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:46,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:46,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:46,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793308189] [2024-10-31 21:55:46,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:46,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:46,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:46,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-31 21:55:46,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:46,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:46,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-31 21:55:46,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:46,619 INFO L124 PetriNetUnfolderBase]: 61/128 cut-off events. [2024-10-31 21:55:46,619 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 21:55:46,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 61/128 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 381 event pairs, 31 based on Foata normal form. 9/136 useless extension candidates. Maximal degree in co-relation 218. Up to 86 conditions per place. [2024-10-31 21:55:46,623 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-10-31 21:55:46,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 109 flow [2024-10-31 21:55:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:55:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-10-31 21:55:46,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-10-31 21:55:46,637 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 43 transitions. [2024-10-31 21:55:46,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 109 flow [2024-10-31 21:55:46,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 21:55:46,642 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-10-31 21:55:46,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-10-31 21:55:46,648 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-10-31 21:55:46,649 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-10-31 21:55:46,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:46,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:46,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:46,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:55:46,651 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:55:46,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1437000289, now seen corresponding path program 1 times [2024-10-31 21:55:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:46,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544694152] [2024-10-31 21:55:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:55:46,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:46,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544694152] [2024-10-31 21:55:46,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544694152] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:46,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:46,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:46,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211348980] [2024-10-31 21:55:46,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:46,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:46,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:46,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-31 21:55:46,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:46,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:46,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-31 21:55:46,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:46,965 INFO L124 PetriNetUnfolderBase]: 89/179 cut-off events. [2024-10-31 21:55:46,965 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-10-31 21:55:46,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 179 events. 89/179 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 598 event pairs, 37 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 104. Up to 108 conditions per place. [2024-10-31 21:55:46,968 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 22 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-10-31 21:55:46,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 133 flow [2024-10-31 21:55:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:55:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-31 21:55:46,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-10-31 21:55:46,971 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 44 transitions. [2024-10-31 21:55:46,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 133 flow [2024-10-31 21:55:46,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:55:46,973 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-31 21:55:46,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-31 21:55:46,975 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-31 21:55:46,975 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-31 21:55:46,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:46,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:46,976 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:46,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:55:46,976 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:55:46,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1087690981, now seen corresponding path program 1 times [2024-10-31 21:55:46,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:46,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221142825] [2024-10-31 21:55:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:46,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:47,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:47,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221142825] [2024-10-31 21:55:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221142825] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:47,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659220569] [2024-10-31 21:55:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:47,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:47,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:47,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:55:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:47,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:55:47,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:48,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:49,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659220569] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:49,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:49,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 21:55:49,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524085330] [2024-10-31 21:55:49,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:49,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 21:55:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 21:55:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:55:49,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 21:55:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:49,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:49,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 21:55:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:50,620 INFO L124 PetriNetUnfolderBase]: 387/665 cut-off events. [2024-10-31 21:55:50,620 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-10-31 21:55:50,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 665 events. 387/665 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2625 event pairs, 23 based on Foata normal form. 14/679 useless extension candidates. Maximal degree in co-relation 595. Up to 218 conditions per place. [2024-10-31 21:55:50,627 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 74 selfloop transitions, 53 changer transitions 15/143 dead transitions. [2024-10-31 21:55:50,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 143 transitions, 708 flow [2024-10-31 21:55:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-31 21:55:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-31 21:55:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 215 transitions. [2024-10-31 21:55:50,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2024-10-31 21:55:50,631 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 26 states and 215 transitions. [2024-10-31 21:55:50,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 143 transitions, 708 flow [2024-10-31 21:55:50,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 143 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:55:50,640 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 504 flow [2024-10-31 21:55:50,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=504, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2024-10-31 21:55:50,642 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 42 predicate places. [2024-10-31 21:55:50,643 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 504 flow [2024-10-31 21:55:50,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:50,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:50,644 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:50,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 21:55:50,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:50,849 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:55:50,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1244966769, now seen corresponding path program 2 times [2024-10-31 21:55:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:50,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83815198] [2024-10-31 21:55:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:50,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:51,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:51,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83815198] [2024-10-31 21:55:51,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83815198] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:51,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005235788] [2024-10-31 21:55:51,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:55:51,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:51,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:51,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:51,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:55:51,261 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:55:51,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:55:51,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:55:51,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:51,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:52,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005235788] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:52,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:52,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 21:55:52,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825813766] [2024-10-31 21:55:52,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:52,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 21:55:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 21:55:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:55:52,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 21:55:52,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 504 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:52,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:52,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 21:55:52,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:53,421 INFO L124 PetriNetUnfolderBase]: 573/1013 cut-off events. [2024-10-31 21:55:53,421 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2024-10-31 21:55:53,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 1013 events. 573/1013 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4701 event pairs, 35 based on Foata normal form. 2/1015 useless extension candidates. Maximal degree in co-relation 4191. Up to 290 conditions per place. [2024-10-31 21:55:53,431 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 104 selfloop transitions, 107 changer transitions 28/240 dead transitions. [2024-10-31 21:55:53,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 240 transitions, 1958 flow [2024-10-31 21:55:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 21:55:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-31 21:55:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 227 transitions. [2024-10-31 21:55:53,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2024-10-31 21:55:53,434 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 504 flow. Second operand 24 states and 227 transitions. [2024-10-31 21:55:53,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 240 transitions, 1958 flow [2024-10-31 21:55:53,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 240 transitions, 1936 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-10-31 21:55:53,462 INFO L231 Difference]: Finished difference. Result has 102 places, 145 transitions, 1431 flow [2024-10-31 21:55:53,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1431, PETRI_PLACES=102, PETRI_TRANSITIONS=145} [2024-10-31 21:55:53,463 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 79 predicate places. [2024-10-31 21:55:53,463 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 145 transitions, 1431 flow [2024-10-31 21:55:53,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:53,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:53,463 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:53,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:55:53,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:53,664 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:55:53,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash 253928195, now seen corresponding path program 3 times [2024-10-31 21:55:53,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:53,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281912747] [2024-10-31 21:55:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:53,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:53,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:53,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281912747] [2024-10-31 21:55:53,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281912747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:53,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397172046] [2024-10-31 21:55:53,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:55:53,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:53,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:53,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:53,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:55:54,022 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 21:55:54,022 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:55:54,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:55:54,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:54,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:55,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397172046] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:55,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:55,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 21:55:55,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703215518] [2024-10-31 21:55:55,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:55,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 21:55:55,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 21:55:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:55:55,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 21:55:55,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 145 transitions, 1431 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:55,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:55,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 21:55:55,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:57,000 INFO L124 PetriNetUnfolderBase]: 603/1072 cut-off events. [2024-10-31 21:55:57,000 INFO L125 PetriNetUnfolderBase]: For 5793/5793 co-relation queries the response was YES. [2024-10-31 21:55:57,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5843 conditions, 1072 events. 603/1072 cut-off events. For 5793/5793 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5095 event pairs, 27 based on Foata normal form. 2/1074 useless extension candidates. Maximal degree in co-relation 5770. Up to 304 conditions per place. [2024-10-31 21:55:57,016 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 105 selfloop transitions, 139 changer transitions 21/266 dead transitions. [2024-10-31 21:55:57,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 266 transitions, 2879 flow [2024-10-31 21:55:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-31 21:55:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-31 21:55:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-10-31 21:55:57,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-10-31 21:55:57,020 INFO L175 Difference]: Start difference. First operand has 102 places, 145 transitions, 1431 flow. Second operand 28 states and 254 transitions. [2024-10-31 21:55:57,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 266 transitions, 2879 flow [2024-10-31 21:55:57,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 266 transitions, 2772 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-10-31 21:55:57,085 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 2184 flow [2024-10-31 21:55:57,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2184, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-10-31 21:55:57,087 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 111 predicate places. [2024-10-31 21:55:57,089 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 2184 flow [2024-10-31 21:55:57,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:57,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:57,090 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:57,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:55:57,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:57,292 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:55:57,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1106845699, now seen corresponding path program 4 times [2024-10-31 21:55:57,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:57,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101715689] [2024-10-31 21:55:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:57,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:57,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:57,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101715689] [2024-10-31 21:55:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101715689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522675676] [2024-10-31 21:55:57,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 21:55:57,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:57,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:57,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:57,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:55:57,744 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 21:55:57,744 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:55:57,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 21:55:57,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:57,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522675676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:58,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-10-31 21:55:58,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037789233] [2024-10-31 21:55:58,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:58,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 21:55:58,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 21:55:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:55:58,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 21:55:58,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 2184 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:58,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:58,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 21:55:58,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:01,146 INFO L124 PetriNetUnfolderBase]: 982/1749 cut-off events. [2024-10-31 21:56:01,147 INFO L125 PetriNetUnfolderBase]: For 14658/14658 co-relation queries the response was YES. [2024-10-31 21:56:01,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11089 conditions, 1749 events. 982/1749 cut-off events. For 14658/14658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9256 event pairs, 28 based on Foata normal form. 4/1753 useless extension candidates. Maximal degree in co-relation 10972. Up to 511 conditions per place. [2024-10-31 21:56:01,174 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 183 selfloop transitions, 250 changer transitions 19/453 dead transitions. [2024-10-31 21:56:01,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 453 transitions, 6004 flow [2024-10-31 21:56:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-31 21:56:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-10-31 21:56:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 357 transitions. [2024-10-31 21:56:01,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-10-31 21:56:01,177 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 2184 flow. Second operand 39 states and 357 transitions. [2024-10-31 21:56:01,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 453 transitions, 6004 flow [2024-10-31 21:56:01,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 453 transitions, 5524 flow, removed 105 selfloop flow, removed 15 redundant places. [2024-10-31 21:56:01,362 INFO L231 Difference]: Finished difference. Result has 172 places, 324 transitions, 4614 flow [2024-10-31 21:56:01,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4614, PETRI_PLACES=172, PETRI_TRANSITIONS=324} [2024-10-31 21:56:01,364 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 149 predicate places. [2024-10-31 21:56:01,364 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 324 transitions, 4614 flow [2024-10-31 21:56:01,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:01,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:01,365 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:01,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:56:01,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:01,566 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:56:01,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1094682093, now seen corresponding path program 5 times [2024-10-31 21:56:01,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:01,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987106465] [2024-10-31 21:56:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:01,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:01,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:01,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987106465] [2024-10-31 21:56:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987106465] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364789718] [2024-10-31 21:56:01,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 21:56:01,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:01,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:01,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:01,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:56:02,002 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:56:02,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:02,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 21:56:02,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:02,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364789718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:02,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:02,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-10-31 21:56:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295716611] [2024-10-31 21:56:02,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:02,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 21:56:02,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:02,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 21:56:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:56:03,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 21:56:03,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 324 transitions, 4614 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:03,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:03,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 21:56:03,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:04,922 INFO L124 PetriNetUnfolderBase]: 1104/1944 cut-off events. [2024-10-31 21:56:04,922 INFO L125 PetriNetUnfolderBase]: For 20936/20936 co-relation queries the response was YES. [2024-10-31 21:56:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13794 conditions, 1944 events. 1104/1944 cut-off events. For 20936/20936 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10435 event pairs, 41 based on Foata normal form. 2/1946 useless extension candidates. Maximal degree in co-relation 13641. Up to 751 conditions per place. [2024-10-31 21:56:04,956 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 204 selfloop transitions, 256 changer transitions 24/485 dead transitions. [2024-10-31 21:56:04,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 485 transitions, 7420 flow [2024-10-31 21:56:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-31 21:56:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-31 21:56:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 305 transitions. [2024-10-31 21:56:04,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-10-31 21:56:04,959 INFO L175 Difference]: Start difference. First operand has 172 places, 324 transitions, 4614 flow. Second operand 35 states and 305 transitions. [2024-10-31 21:56:04,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 485 transitions, 7420 flow [2024-10-31 21:56:05,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 485 transitions, 6431 flow, removed 393 selfloop flow, removed 14 redundant places. [2024-10-31 21:56:05,254 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 5574 flow [2024-10-31 21:56:05,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5574, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-10-31 21:56:05,257 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 180 predicate places. [2024-10-31 21:56:05,258 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 5574 flow [2024-10-31 21:56:05,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:05,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:05,259 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:05,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:56:05,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:05,465 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:56:05,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 691254019, now seen corresponding path program 6 times [2024-10-31 21:56:05,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356527710] [2024-10-31 21:56:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:05,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:05,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356527710] [2024-10-31 21:56:05,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356527710] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:05,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237312447] [2024-10-31 21:56:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 21:56:05,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:05,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:05,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:05,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:56:05,891 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-31 21:56:05,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:05,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:56:05,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:06,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237312447] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:06,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:06,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 21:56:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670790331] [2024-10-31 21:56:06,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:06,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 21:56:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:06,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 21:56:06,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:56:06,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 21:56:06,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 5574 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:06,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:06,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 21:56:06,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:08,697 INFO L124 PetriNetUnfolderBase]: 1225/2178 cut-off events. [2024-10-31 21:56:08,697 INFO L125 PetriNetUnfolderBase]: For 20738/20738 co-relation queries the response was YES. [2024-10-31 21:56:08,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15330 conditions, 2178 events. 1225/2178 cut-off events. For 20738/20738 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12176 event pairs, 36 based on Foata normal form. 13/2191 useless extension candidates. Maximal degree in co-relation 15168. Up to 974 conditions per place. [2024-10-31 21:56:08,739 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 220 selfloop transitions, 276 changer transitions 30/527 dead transitions. [2024-10-31 21:56:08,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 527 transitions, 8436 flow [2024-10-31 21:56:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-31 21:56:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-31 21:56:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 205 transitions. [2024-10-31 21:56:08,748 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4244306418219462 [2024-10-31 21:56:08,748 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 5574 flow. Second operand 23 states and 205 transitions. [2024-10-31 21:56:08,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 527 transitions, 8436 flow [2024-10-31 21:56:09,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 527 transitions, 8230 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-10-31 21:56:09,048 INFO L231 Difference]: Finished difference. Result has 221 places, 442 transitions, 7609 flow [2024-10-31 21:56:09,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7609, PETRI_PLACES=221, PETRI_TRANSITIONS=442} [2024-10-31 21:56:09,050 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 198 predicate places. [2024-10-31 21:56:09,050 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 442 transitions, 7609 flow [2024-10-31 21:56:09,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:09,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:09,051 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:09,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 21:56:09,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 21:56:09,256 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:56:09,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1544171523, now seen corresponding path program 7 times [2024-10-31 21:56:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:09,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69414751] [2024-10-31 21:56:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:09,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:09,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69414751] [2024-10-31 21:56:09,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69414751] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683055470] [2024-10-31 21:56:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 21:56:09,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:09,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:09,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:56:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:09,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:56:09,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:10,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:10,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683055470] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:10,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:10,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-31 21:56:10,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558323692] [2024-10-31 21:56:10,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:10,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-31 21:56:10,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-31 21:56:10,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-10-31 21:56:10,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 21:56:10,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 442 transitions, 7609 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:10,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:10,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 21:56:10,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:12,575 INFO L124 PetriNetUnfolderBase]: 1291/2280 cut-off events. [2024-10-31 21:56:12,575 INFO L125 PetriNetUnfolderBase]: For 28931/28931 co-relation queries the response was YES. [2024-10-31 21:56:12,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17865 conditions, 2280 events. 1291/2280 cut-off events. For 28931/28931 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12712 event pairs, 27 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 17694. Up to 1028 conditions per place. [2024-10-31 21:56:12,605 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 232 selfloop transitions, 335 changer transitions 21/589 dead transitions. [2024-10-31 21:56:12,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 589 transitions, 10730 flow [2024-10-31 21:56:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-31 21:56:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-31 21:56:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 223 transitions. [2024-10-31 21:56:12,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3932980599647266 [2024-10-31 21:56:12,608 INFO L175 Difference]: Start difference. First operand has 221 places, 442 transitions, 7609 flow. Second operand 27 states and 223 transitions. [2024-10-31 21:56:12,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 589 transitions, 10730 flow [2024-10-31 21:56:12,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 589 transitions, 10506 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-10-31 21:56:12,983 INFO L231 Difference]: Finished difference. Result has 248 places, 516 transitions, 10031 flow [2024-10-31 21:56:12,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10031, PETRI_PLACES=248, PETRI_TRANSITIONS=516} [2024-10-31 21:56:12,985 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 225 predicate places. [2024-10-31 21:56:12,985 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 516 transitions, 10031 flow [2024-10-31 21:56:12,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:12,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:12,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:13,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 21:56:13,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 21:56:13,187 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 21:56:13,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1247042307, now seen corresponding path program 8 times [2024-10-31 21:56:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:13,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977494581] [2024-10-31 21:56:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:13,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:13,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977494581] [2024-10-31 21:56:13,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977494581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:13,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331788399] [2024-10-31 21:56:13,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:56:13,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:13,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:13,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d2a295f-dbae-4b24-8731-d537393799e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 21:56:13,600 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:56:13,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:13,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:56:13,602 INFO L278 TraceCheckSpWp]: Computing forward predicates...