./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:29:36,008 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:29:36,141 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:29:36,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:29:36,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:29:36,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:29:36,194 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:29:36,195 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:29:36,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:29:36,203 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:29:36,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:29:36,205 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:29:36,205 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:29:36,207 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:29:36,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:29:36,208 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:29:36,209 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:29:36,209 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:29:36,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:29:36,210 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:29:36,210 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:29:36,211 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:29:36,212 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:29:36,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:29:36,212 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:29:36,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:29:36,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:29:36,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:29:36,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:29:36,215 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:29:36,217 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:29:36,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:29:36,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:29:36,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:29:36,218 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:29:36,218 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:29:36,218 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:29:36,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:29:36,219 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:29:36,219 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_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2023-11-12 02:29:36,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:29:36,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:29:36,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:29:36,545 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:29:36,546 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:29:36,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-12 02:29:39,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:29:39,991 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:29:39,992 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-12 02:29:40,001 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/data/4419249cd/823e57152dde4019acb324c1109e5239/FLAG22f96975d [2023-11-12 02:29:40,017 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/data/4419249cd/823e57152dde4019acb324c1109e5239 [2023-11-12 02:29:40,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:29:40,021 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:29:40,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:29:40,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:29:40,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:29:40,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a4989b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40, skipping insertion in model container [2023-11-12 02:29:40,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,060 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:29:40,224 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-12 02:29:40,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:29:40,239 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:29:40,261 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-12 02:29:40,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:29:40,271 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:29:40,272 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:29:40,280 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:29:40,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40 WrapperNode [2023-11-12 02:29:40,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:29:40,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:29:40,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:29:40,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:29:40,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,326 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-12 02:29:40,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:29:40,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:29:40,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:29:40,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:29:40,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:29:40,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:29:40,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:29:40,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:29:40,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (1/1) ... [2023-11-12 02:29:40,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:29:40,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:40,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:40,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:29:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:29:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:29:40,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:29:40,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:29:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:29:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:29:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:29:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:29:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:29:40,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:29:40,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:29:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:29:40,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:29:40,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:29:40,453 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:29:40,626 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:29:40,629 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:29:40,921 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:29:41,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:29:41,013 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:29:41,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:29:41 BoogieIcfgContainer [2023-11-12 02:29:41,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:29:41,021 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:29:41,021 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:29:41,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:29:41,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:29:40" (1/3) ... [2023-11-12 02:29:41,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd8aa7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:29:41, skipping insertion in model container [2023-11-12 02:29:41,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:40" (2/3) ... [2023-11-12 02:29:41,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd8aa7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:29:41, skipping insertion in model container [2023-11-12 02:29:41,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:29:41" (3/3) ... [2023-11-12 02:29:41,027 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-11-12 02:29:41,040 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:29:41,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:29:41,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:29:41,052 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:29:41,121 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:29:41,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 196 flow [2023-11-12 02:29:41,239 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-12 02:29:41,239 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:29:41,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-12 02:29:41,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 196 flow [2023-11-12 02:29:41,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 80 transitions, 172 flow [2023-11-12 02:29:41,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:29:41,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 80 transitions, 172 flow [2023-11-12 02:29:41,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 80 transitions, 172 flow [2023-11-12 02:29:41,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 172 flow [2023-11-12 02:29:41,317 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-11-12 02:29:41,317 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:29:41,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-12 02:29:41,320 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-12 02:29:43,876 INFO L134 LiptonReduction]: Checked pairs total: 684 [2023-11-12 02:29:43,876 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-11-12 02:29:43,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:29:43,900 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3495df43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:29:43,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:29:43,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:29:43,907 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-12 02:29:43,907 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:29:43,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:43,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:43,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:43,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1955877256, now seen corresponding path program 1 times [2023-11-12 02:29:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:43,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34928524] [2023-11-12 02:29:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:44,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34928524] [2023-11-12 02:29:44,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34928524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:44,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:44,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:29:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530695882] [2023-11-12 02:29:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:44,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:44,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:44,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-12 02:29:44,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:44,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:44,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-12 02:29:44,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:45,107 INFO L124 PetriNetUnfolderBase]: 98/184 cut-off events. [2023-11-12 02:29:45,108 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-12 02:29:45,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 184 events. 98/184 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 576 event pairs, 32 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 292. Up to 85 conditions per place. [2023-11-12 02:29:45,140 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 36 selfloop transitions, 10 changer transitions 5/51 dead transitions. [2023-11-12 02:29:45,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 51 transitions, 240 flow [2023-11-12 02:29:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:29:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 521 transitions. [2023-11-12 02:29:45,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44302721088435376 [2023-11-12 02:29:45,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 521 transitions. [2023-11-12 02:29:45,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 521 transitions. [2023-11-12 02:29:45,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:45,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 521 transitions. [2023-11-12 02:29:45,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,182 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,184 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 521 transitions. [2023-11-12 02:29:45,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 51 transitions, 240 flow [2023-11-12 02:29:45,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 51 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:29:45,191 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 100 flow [2023-11-12 02:29:45,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-11-12 02:29:45,198 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-12 02:29:45,198 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 100 flow [2023-11-12 02:29:45,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:45,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:45,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:29:45,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:45,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1577096610, now seen corresponding path program 2 times [2023-11-12 02:29:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:45,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109629663] [2023-11-12 02:29:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:45,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:45,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109629663] [2023-11-12 02:29:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109629663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:45,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:29:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258842976] [2023-11-12 02:29:45,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:45,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:45,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-12 02:29:45,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:45,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-12 02:29:45,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:45,825 INFO L124 PetriNetUnfolderBase]: 109/209 cut-off events. [2023-11-12 02:29:45,826 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-12 02:29:45,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 209 events. 109/209 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 713 event pairs, 12 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 613. Up to 125 conditions per place. [2023-11-12 02:29:45,835 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 42 selfloop transitions, 14 changer transitions 5/61 dead transitions. [2023-11-12 02:29:45,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 61 transitions, 354 flow [2023-11-12 02:29:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:29:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 523 transitions. [2023-11-12 02:29:45,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447278911564626 [2023-11-12 02:29:45,843 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 523 transitions. [2023-11-12 02:29:45,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 523 transitions. [2023-11-12 02:29:45,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:45,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 523 transitions. [2023-11-12 02:29:45,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.71428571428571) internal successors, (523), 7 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,855 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,855 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 100 flow. Second operand 7 states and 523 transitions. [2023-11-12 02:29:45,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 61 transitions, 354 flow [2023-11-12 02:29:45,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 61 transitions, 338 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:45,864 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 191 flow [2023-11-12 02:29:45,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-12 02:29:45,867 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-12 02:29:45,867 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 191 flow [2023-11-12 02:29:45,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:45,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:45,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:45,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:29:45,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:45,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1874789880, now seen corresponding path program 3 times [2023-11-12 02:29:45,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:45,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869822659] [2023-11-12 02:29:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:45,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:46,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869822659] [2023-11-12 02:29:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869822659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:46,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:46,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:29:46,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374392410] [2023-11-12 02:29:46,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:46,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:46,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:46,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-12 02:29:46,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:46,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:46,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-12 02:29:46,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:46,550 INFO L124 PetriNetUnfolderBase]: 115/219 cut-off events. [2023-11-12 02:29:46,550 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2023-11-12 02:29:46,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 219 events. 115/219 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 743 event pairs, 32 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 788. Up to 95 conditions per place. [2023-11-12 02:29:46,553 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 33 selfloop transitions, 21 changer transitions 5/59 dead transitions. [2023-11-12 02:29:46,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 428 flow [2023-11-12 02:29:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:29:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 518 transitions. [2023-11-12 02:29:46,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-11-12 02:29:46,557 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 518 transitions. [2023-11-12 02:29:46,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 518 transitions. [2023-11-12 02:29:46,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:46,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 518 transitions. [2023-11-12 02:29:46,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:46,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:46,564 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:46,565 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 191 flow. Second operand 7 states and 518 transitions. [2023-11-12 02:29:46,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 428 flow [2023-11-12 02:29:46,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 398 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-12 02:29:46,570 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 279 flow [2023-11-12 02:29:46,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-12 02:29:46,572 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-12 02:29:46,572 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 279 flow [2023-11-12 02:29:46,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:46,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:46,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:46,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:29:46,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 750816584, now seen corresponding path program 4 times [2023-11-12 02:29:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246722246] [2023-11-12 02:29:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:46,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:46,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246722246] [2023-11-12 02:29:46,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246722246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:46,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:46,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:29:46,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096745567] [2023-11-12 02:29:46,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:46,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:46,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:46,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-12 02:29:46,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:46,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:46,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-12 02:29:46,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:47,066 INFO L124 PetriNetUnfolderBase]: 129/247 cut-off events. [2023-11-12 02:29:47,066 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-11-12 02:29:47,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 247 events. 129/247 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 893 event pairs, 22 based on Foata normal form. 1/248 useless extension candidates. Maximal degree in co-relation 955. Up to 155 conditions per place. [2023-11-12 02:29:47,070 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 35 selfloop transitions, 24 changer transitions 5/64 dead transitions. [2023-11-12 02:29:47,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 532 flow [2023-11-12 02:29:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:29:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 516 transitions. [2023-11-12 02:29:47,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2023-11-12 02:29:47,074 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 516 transitions. [2023-11-12 02:29:47,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 516 transitions. [2023-11-12 02:29:47,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:47,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 516 transitions. [2023-11-12 02:29:47,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,081 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,081 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 279 flow. Second operand 7 states and 516 transitions. [2023-11-12 02:29:47,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 532 flow [2023-11-12 02:29:47,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 496 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-12 02:29:47,090 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 390 flow [2023-11-12 02:29:47,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-12 02:29:47,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-11-12 02:29:47,092 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 390 flow [2023-11-12 02:29:47,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:47,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:47,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:29:47,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:47,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash -936886930, now seen corresponding path program 5 times [2023-11-12 02:29:47,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:47,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845517149] [2023-11-12 02:29:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:47,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:47,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845517149] [2023-11-12 02:29:47,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845517149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:47,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:47,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:29:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222797539] [2023-11-12 02:29:47,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:47,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:47,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-12 02:29:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-12 02:29:47,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:47,665 INFO L124 PetriNetUnfolderBase]: 140/272 cut-off events. [2023-11-12 02:29:47,665 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2023-11-12 02:29:47,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 272 events. 140/272 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1031 event pairs, 30 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 1136. Up to 159 conditions per place. [2023-11-12 02:29:47,669 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 37 selfloop transitions, 26 changer transitions 5/68 dead transitions. [2023-11-12 02:29:47,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 611 flow [2023-11-12 02:29:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:29:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 518 transitions. [2023-11-12 02:29:47,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-11-12 02:29:47,673 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 518 transitions. [2023-11-12 02:29:47,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 518 transitions. [2023-11-12 02:29:47,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:47,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 518 transitions. [2023-11-12 02:29:47,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,679 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,680 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 390 flow. Second operand 7 states and 518 transitions. [2023-11-12 02:29:47,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 611 flow [2023-11-12 02:29:47,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 570 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-12 02:29:47,687 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 445 flow [2023-11-12 02:29:47,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-12 02:29:47,690 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-11-12 02:29:47,690 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 445 flow [2023-11-12 02:29:47,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:47,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:47,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:47,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:29:47,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:47,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1408396894, now seen corresponding path program 6 times [2023-11-12 02:29:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:47,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105076905] [2023-11-12 02:29:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:47,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:47,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:47,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105076905] [2023-11-12 02:29:47,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105076905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:47,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:47,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:29:47,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745130657] [2023-11-12 02:29:47,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:47,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:48,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 168 [2023-11-12 02:29:48,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 445 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:48,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 168 [2023-11-12 02:29:48,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:48,220 INFO L124 PetriNetUnfolderBase]: 137/263 cut-off events. [2023-11-12 02:29:48,221 INFO L125 PetriNetUnfolderBase]: For 841/841 co-relation queries the response was YES. [2023-11-12 02:29:48,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 263 events. 137/263 cut-off events. For 841/841 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 966 event pairs, 46 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 1168. Up to 123 conditions per place. [2023-11-12 02:29:48,225 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 36 selfloop transitions, 28 changer transitions 5/69 dead transitions. [2023-11-12 02:29:48,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 657 flow [2023-11-12 02:29:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:29:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 520 transitions. [2023-11-12 02:29:48,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2023-11-12 02:29:48,229 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 520 transitions. [2023-11-12 02:29:48,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 520 transitions. [2023-11-12 02:29:48,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:48,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 520 transitions. [2023-11-12 02:29:48,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.28571428571429) internal successors, (520), 7 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,236 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,236 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 445 flow. Second operand 7 states and 520 transitions. [2023-11-12 02:29:48,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 657 flow [2023-11-12 02:29:48,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 616 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-12 02:29:48,243 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 464 flow [2023-11-12 02:29:48,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-11-12 02:29:48,247 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-12 02:29:48,247 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 464 flow [2023-11-12 02:29:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:48,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:48,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:29:48,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:48,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:48,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1336044782, now seen corresponding path program 1 times [2023-11-12 02:29:48,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:48,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828744991] [2023-11-12 02:29:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:48,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:48,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828744991] [2023-11-12 02:29:48,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828744991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:48,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:48,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:29:48,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3109646] [2023-11-12 02:29:48,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:48,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:48,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:48,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:48,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:48,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 168 [2023-11-12 02:29:48,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:48,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 168 [2023-11-12 02:29:48,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:48,352 INFO L124 PetriNetUnfolderBase]: 60/125 cut-off events. [2023-11-12 02:29:48,352 INFO L125 PetriNetUnfolderBase]: For 681/681 co-relation queries the response was YES. [2023-11-12 02:29:48,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 125 events. 60/125 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 376 event pairs, 26 based on Foata normal form. 18/143 useless extension candidates. Maximal degree in co-relation 559. Up to 67 conditions per place. [2023-11-12 02:29:48,355 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 24 selfloop transitions, 7 changer transitions 6/37 dead transitions. [2023-11-12 02:29:48,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 37 transitions, 375 flow [2023-11-12 02:29:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-11-12 02:29:48,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2023-11-12 02:29:48,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-11-12 02:29:48,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-11-12 02:29:48,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:48,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-11-12 02:29:48,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,363 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 464 flow. Second operand 3 states and 262 transitions. [2023-11-12 02:29:48,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 37 transitions, 375 flow [2023-11-12 02:29:48,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 297 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-11-12 02:29:48,367 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 181 flow [2023-11-12 02:29:48,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-11-12 02:29:48,369 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-12 02:29:48,369 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 181 flow [2023-11-12 02:29:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:48,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:48,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:29:48,370 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:48,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 424857833, now seen corresponding path program 1 times [2023-11-12 02:29:48,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:48,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798796404] [2023-11-12 02:29:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:48,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:48,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:48,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798796404] [2023-11-12 02:29:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798796404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785238894] [2023-11-12 02:29:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:48,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:48,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:48,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:48,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:29:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:48,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:29:48,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:48,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785238894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:49,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:49,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:29:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610093853] [2023-11-12 02:29:49,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:49,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:29:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:29:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:29:49,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:29:49,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 181 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:49,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:49,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:29:49,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:50,087 INFO L124 PetriNetUnfolderBase]: 140/296 cut-off events. [2023-11-12 02:29:50,088 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-12 02:29:50,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 296 events. 140/296 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1257 event pairs, 10 based on Foata normal form. 17/313 useless extension candidates. Maximal degree in co-relation 885. Up to 73 conditions per place. [2023-11-12 02:29:50,091 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 67 selfloop transitions, 24 changer transitions 25/116 dead transitions. [2023-11-12 02:29:50,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 116 transitions, 674 flow [2023-11-12 02:29:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:29:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:29:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1283 transitions. [2023-11-12 02:29:50,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42427248677248675 [2023-11-12 02:29:50,098 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1283 transitions. [2023-11-12 02:29:50,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1283 transitions. [2023-11-12 02:29:50,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:50,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1283 transitions. [2023-11-12 02:29:50,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 71.27777777777777) internal successors, (1283), 18 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:50,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:50,112 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:50,112 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 181 flow. Second operand 18 states and 1283 transitions. [2023-11-12 02:29:50,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 116 transitions, 674 flow [2023-11-12 02:29:50,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 116 transitions, 647 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-12 02:29:50,117 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 308 flow [2023-11-12 02:29:50,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-12 02:29:50,118 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-12 02:29:50,119 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 308 flow [2023-11-12 02:29:50,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:50,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:50,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:50,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:50,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:50,326 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:50,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -261664481, now seen corresponding path program 2 times [2023-11-12 02:29:50,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:50,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282609214] [2023-11-12 02:29:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:50,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:50,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282609214] [2023-11-12 02:29:50,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282609214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:50,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443653895] [2023-11-12 02:29:50,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:29:50,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:50,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:50,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:29:50,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:29:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:50,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:29:50,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:50,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:51,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443653895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:51,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:51,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:29:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140976312] [2023-11-12 02:29:51,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:51,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:29:51,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:29:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:29:51,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:29:51,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 308 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:51,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:51,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:29:51,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:52,159 INFO L124 PetriNetUnfolderBase]: 182/396 cut-off events. [2023-11-12 02:29:52,159 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-11-12 02:29:52,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 396 events. 182/396 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1860 event pairs, 22 based on Foata normal form. 3/399 useless extension candidates. Maximal degree in co-relation 1607. Up to 127 conditions per place. [2023-11-12 02:29:52,165 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 84 selfloop transitions, 46 changer transitions 17/147 dead transitions. [2023-11-12 02:29:52,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 147 transitions, 1100 flow [2023-11-12 02:29:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:29:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-12 02:29:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1760 transitions. [2023-11-12 02:29:52,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2023-11-12 02:29:52,174 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1760 transitions. [2023-11-12 02:29:52,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1760 transitions. [2023-11-12 02:29:52,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:52,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1760 transitions. [2023-11-12 02:29:52,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 70.4) internal successors, (1760), 25 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:52,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:52,192 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:52,193 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 308 flow. Second operand 25 states and 1760 transitions. [2023-11-12 02:29:52,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 147 transitions, 1100 flow [2023-11-12 02:29:52,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 147 transitions, 937 flow, removed 77 selfloop flow, removed 6 redundant places. [2023-11-12 02:29:52,202 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 541 flow [2023-11-12 02:29:52,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=541, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-12 02:29:52,204 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-12 02:29:52,204 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 541 flow [2023-11-12 02:29:52,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:52,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:52,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:52,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:29:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:52,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:52,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash -284555501, now seen corresponding path program 3 times [2023-11-12 02:29:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990973982] [2023-11-12 02:29:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990973982] [2023-11-12 02:29:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990973982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788053879] [2023-11-12 02:29:52,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:29:52,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:52,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:52,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:29:52,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:29:52,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:52,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:29:52,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:52,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788053879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:53,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:53,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:29:53,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202110834] [2023-11-12 02:29:53,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:53,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:29:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:29:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:29:53,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:29:53,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 541 flow. Second operand has 19 states, 19 states have (on average 67.10526315789474) internal successors, (1275), 19 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:53,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:53,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:29:53,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:54,281 INFO L124 PetriNetUnfolderBase]: 180/377 cut-off events. [2023-11-12 02:29:54,281 INFO L125 PetriNetUnfolderBase]: For 1783/1783 co-relation queries the response was YES. [2023-11-12 02:29:54,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 377 events. 180/377 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1688 event pairs, 18 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 1783. Up to 129 conditions per place. [2023-11-12 02:29:54,288 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 62 selfloop transitions, 39 changer transitions 34/135 dead transitions. [2023-11-12 02:29:54,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1090 flow [2023-11-12 02:29:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:29:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-12 02:29:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1552 transitions. [2023-11-12 02:29:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-11-12 02:29:54,297 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1552 transitions. [2023-11-12 02:29:54,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1552 transitions. [2023-11-12 02:29:54,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:54,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1552 transitions. [2023-11-12 02:29:54,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.54545454545455) internal successors, (1552), 22 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:54,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:54,315 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:54,315 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 541 flow. Second operand 22 states and 1552 transitions. [2023-11-12 02:29:54,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1090 flow [2023-11-12 02:29:54,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 984 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-11-12 02:29:54,327 INFO L231 Difference]: Finished difference. Result has 97 places, 60 transitions, 506 flow [2023-11-12 02:29:54,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=506, PETRI_PLACES=97, PETRI_TRANSITIONS=60} [2023-11-12 02:29:54,329 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-11-12 02:29:54,329 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 60 transitions, 506 flow [2023-11-12 02:29:54,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.10526315789474) internal successors, (1275), 19 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:54,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:54,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:54,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:54,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:29:54,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:54,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash 779171725, now seen corresponding path program 4 times [2023-11-12 02:29:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:54,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234757069] [2023-11-12 02:29:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:54,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:54,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234757069] [2023-11-12 02:29:54,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234757069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:54,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800015018] [2023-11-12 02:29:54,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:29:54,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:54,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:54,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:54,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:29:54,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:29:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:54,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:29:54,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:55,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800015018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:55,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:55,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:29:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744034336] [2023-11-12 02:29:55,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:55,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:29:55,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:29:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:29:55,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:29:55,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 60 transitions, 506 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:55,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:55,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:29:55,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:55,711 INFO L124 PetriNetUnfolderBase]: 167/346 cut-off events. [2023-11-12 02:29:55,711 INFO L125 PetriNetUnfolderBase]: For 1929/1929 co-relation queries the response was YES. [2023-11-12 02:29:55,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 346 events. 167/346 cut-off events. For 1929/1929 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1457 event pairs, 24 based on Foata normal form. 2/346 useless extension candidates. Maximal degree in co-relation 1730. Up to 268 conditions per place. [2023-11-12 02:29:55,716 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 55 selfloop transitions, 23 changer transitions 10/88 dead transitions. [2023-11-12 02:29:55,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 88 transitions, 787 flow [2023-11-12 02:29:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:29:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:29:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 906 transitions. [2023-11-12 02:29:55,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41483516483516486 [2023-11-12 02:29:55,720 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 906 transitions. [2023-11-12 02:29:55,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 906 transitions. [2023-11-12 02:29:55,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:55,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 906 transitions. [2023-11-12 02:29:55,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:55,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 168.0) internal successors, (2352), 14 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:55,729 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 168.0) internal successors, (2352), 14 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:55,729 INFO L175 Difference]: Start difference. First operand has 97 places, 60 transitions, 506 flow. Second operand 13 states and 906 transitions. [2023-11-12 02:29:55,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 88 transitions, 787 flow [2023-11-12 02:29:55,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 706 flow, removed 11 selfloop flow, removed 16 redundant places. [2023-11-12 02:29:55,738 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 509 flow [2023-11-12 02:29:55,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=509, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2023-11-12 02:29:55,739 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-12 02:29:55,739 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 509 flow [2023-11-12 02:29:55,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:55,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:55,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:55,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:55,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:55,959 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:55,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash 535939039, now seen corresponding path program 5 times [2023-11-12 02:29:55,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:55,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935148184] [2023-11-12 02:29:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:56,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935148184] [2023-11-12 02:29:56,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935148184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164173887] [2023-11-12 02:29:56,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:29:56,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:56,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:56,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:29:56,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:29:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:56,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:29:56,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:56,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164173887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:56,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:56,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:29:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130563350] [2023-11-12 02:29:56,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:56,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:29:56,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:29:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:29:56,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:29:56,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 509 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:56,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:56,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:29:56,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:57,023 INFO L124 PetriNetUnfolderBase]: 169/352 cut-off events. [2023-11-12 02:29:57,024 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2023-11-12 02:29:57,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 352 events. 169/352 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1487 event pairs, 39 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 1587. Up to 302 conditions per place. [2023-11-12 02:29:57,028 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 57 selfloop transitions, 15 changer transitions 10/82 dead transitions. [2023-11-12 02:29:57,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 748 flow [2023-11-12 02:29:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:29:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:29:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 695 transitions. [2023-11-12 02:29:57,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2023-11-12 02:29:57,031 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 695 transitions. [2023-11-12 02:29:57,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 695 transitions. [2023-11-12 02:29:57,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:57,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 695 transitions. [2023-11-12 02:29:57,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 69.5) internal successors, (695), 10 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:57,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:57,038 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:57,038 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 509 flow. Second operand 10 states and 695 transitions. [2023-11-12 02:29:57,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 748 flow [2023-11-12 02:29:57,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 682 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-11-12 02:29:57,046 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 509 flow [2023-11-12 02:29:57,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=509, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-11-12 02:29:57,047 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-12 02:29:57,047 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 509 flow [2023-11-12 02:29:57,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:57,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:57,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:57,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:57,254 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:57,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1948162507, now seen corresponding path program 6 times [2023-11-12 02:29:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:57,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670115292] [2023-11-12 02:29:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:57,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:57,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670115292] [2023-11-12 02:29:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670115292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364013600] [2023-11-12 02:29:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:29:57,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:57,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:57,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:29:57,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:29:57,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:29:57,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:29:57,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:57,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364013600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:57,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:57,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:29:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141426420] [2023-11-12 02:29:57,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:57,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:29:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:57,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:29:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:29:58,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:29:58,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 509 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:58,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:58,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:29:58,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:58,855 INFO L124 PetriNetUnfolderBase]: 169/366 cut-off events. [2023-11-12 02:29:58,855 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-11-12 02:29:58,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 366 events. 169/366 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1643 event pairs, 17 based on Foata normal form. 4/368 useless extension candidates. Maximal degree in co-relation 1622. Up to 231 conditions per place. [2023-11-12 02:29:58,859 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 64 selfloop transitions, 31 changer transitions 21/116 dead transitions. [2023-11-12 02:29:58,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 116 transitions, 982 flow [2023-11-12 02:29:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:29:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-12 02:29:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1384 transitions. [2023-11-12 02:29:58,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2023-11-12 02:29:58,863 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1384 transitions. [2023-11-12 02:29:58,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1384 transitions. [2023-11-12 02:29:58,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:58,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1384 transitions. [2023-11-12 02:29:58,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 69.2) internal successors, (1384), 20 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:58,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:58,874 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:58,874 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 509 flow. Second operand 20 states and 1384 transitions. [2023-11-12 02:29:58,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 116 transitions, 982 flow [2023-11-12 02:29:58,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 116 transitions, 948 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-12 02:29:58,902 INFO L231 Difference]: Finished difference. Result has 102 places, 73 transitions, 673 flow [2023-11-12 02:29:58,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=673, PETRI_PLACES=102, PETRI_TRANSITIONS=73} [2023-11-12 02:29:58,904 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-12 02:29:58,904 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 73 transitions, 673 flow [2023-11-12 02:29:58,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:58,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:58,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:58,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:29:59,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:29:59,111 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:29:59,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1974678845, now seen corresponding path program 7 times [2023-11-12 02:29:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:59,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127836188] [2023-11-12 02:29:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:59,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:59,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127836188] [2023-11-12 02:29:59,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127836188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619631238] [2023-11-12 02:29:59,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:29:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:59,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:59,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:29:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:59,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:29:59,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:59,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:59,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619631238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:59,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:59,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:29:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997858981] [2023-11-12 02:29:59,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:59,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:29:59,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:29:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:29:59,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:29:59,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 73 transitions, 673 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:59,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:59,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:29:59,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:00,379 INFO L124 PetriNetUnfolderBase]: 151/325 cut-off events. [2023-11-12 02:30:00,380 INFO L125 PetriNetUnfolderBase]: For 1747/1747 co-relation queries the response was YES. [2023-11-12 02:30:00,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 325 events. 151/325 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1375 event pairs, 17 based on Foata normal form. 3/326 useless extension candidates. Maximal degree in co-relation 1669. Up to 260 conditions per place. [2023-11-12 02:30:00,384 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 63 selfloop transitions, 22 changer transitions 11/96 dead transitions. [2023-11-12 02:30:00,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 96 transitions, 960 flow [2023-11-12 02:30:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:30:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:30:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 967 transitions. [2023-11-12 02:30:00,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-11-12 02:30:00,387 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 967 transitions. [2023-11-12 02:30:00,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 967 transitions. [2023-11-12 02:30:00,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:00,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 967 transitions. [2023-11-12 02:30:00,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:00,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:00,404 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:00,404 INFO L175 Difference]: Start difference. First operand has 102 places, 73 transitions, 673 flow. Second operand 14 states and 967 transitions. [2023-11-12 02:30:00,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 96 transitions, 960 flow [2023-11-12 02:30:00,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 856 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-11-12 02:30:00,417 INFO L231 Difference]: Finished difference. Result has 103 places, 73 transitions, 641 flow [2023-11-12 02:30:00,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=641, PETRI_PLACES=103, PETRI_TRANSITIONS=73} [2023-11-12 02:30:00,419 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 83 predicate places. [2023-11-12 02:30:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 73 transitions, 641 flow [2023-11-12 02:30:00,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:00,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:00,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:00,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:00,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:30:00,627 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:00,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:00,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1975868137, now seen corresponding path program 8 times [2023-11-12 02:30:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:00,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147144393] [2023-11-12 02:30:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:00,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147144393] [2023-11-12 02:30:00,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147144393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:00,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118959911] [2023-11-12 02:30:00,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:30:00,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:00,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:00,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:00,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:30:00,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:30:00,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:00,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:30:00,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:01,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:01,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118959911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:01,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:01,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:30:01,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115386184] [2023-11-12 02:30:01,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:01,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:30:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:30:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:30:01,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:01,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 73 transitions, 641 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:01,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:01,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:01,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:02,256 INFO L124 PetriNetUnfolderBase]: 148/304 cut-off events. [2023-11-12 02:30:02,256 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2023-11-12 02:30:02,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1534 conditions, 304 events. 148/304 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1211 event pairs, 17 based on Foata normal form. 3/305 useless extension candidates. Maximal degree in co-relation 1497. Up to 217 conditions per place. [2023-11-12 02:30:02,260 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 59 selfloop transitions, 29 changer transitions 18/106 dead transitions. [2023-11-12 02:30:02,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 963 flow [2023-11-12 02:30:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:30:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:30:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1180 transitions. [2023-11-12 02:30:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41316526610644255 [2023-11-12 02:30:02,264 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1180 transitions. [2023-11-12 02:30:02,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1180 transitions. [2023-11-12 02:30:02,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:02,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1180 transitions. [2023-11-12 02:30:02,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 69.41176470588235) internal successors, (1180), 17 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:02,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:02,273 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:02,273 INFO L175 Difference]: Start difference. First operand has 103 places, 73 transitions, 641 flow. Second operand 17 states and 1180 transitions. [2023-11-12 02:30:02,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 963 flow [2023-11-12 02:30:02,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 917 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-12 02:30:02,284 INFO L231 Difference]: Finished difference. Result has 102 places, 72 transitions, 663 flow [2023-11-12 02:30:02,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=663, PETRI_PLACES=102, PETRI_TRANSITIONS=72} [2023-11-12 02:30:02,285 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-12 02:30:02,285 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 72 transitions, 663 flow [2023-11-12 02:30:02,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:02,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:02,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:02,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:02,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:02,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:02,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:02,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1973489354, now seen corresponding path program 1 times [2023-11-12 02:30:02,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:02,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934629090] [2023-11-12 02:30:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:02,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:02,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:02,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934629090] [2023-11-12 02:30:02,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934629090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080516329] [2023-11-12 02:30:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:02,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:02,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:02,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:30:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:02,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:02,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:03,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:03,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080516329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:03,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:03,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-12 02:30:03,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242309884] [2023-11-12 02:30:03,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:03,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:30:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:30:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:30:03,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:03,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 72 transitions, 663 flow. Second operand has 19 states, 19 states have (on average 66.94736842105263) internal successors, (1272), 19 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:03,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:03,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:03,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:03,930 INFO L124 PetriNetUnfolderBase]: 181/363 cut-off events. [2023-11-12 02:30:03,930 INFO L125 PetriNetUnfolderBase]: For 2145/2145 co-relation queries the response was YES. [2023-11-12 02:30:03,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 363 events. 181/363 cut-off events. For 2145/2145 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1503 event pairs, 10 based on Foata normal form. 7/368 useless extension candidates. Maximal degree in co-relation 1868. Up to 103 conditions per place. [2023-11-12 02:30:03,935 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 58 selfloop transitions, 45 changer transitions 35/138 dead transitions. [2023-11-12 02:30:03,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 138 transitions, 1233 flow [2023-11-12 02:30:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:30:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:30:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1208 transitions. [2023-11-12 02:30:03,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2023-11-12 02:30:03,941 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1208 transitions. [2023-11-12 02:30:03,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1208 transitions. [2023-11-12 02:30:03,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:03,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1208 transitions. [2023-11-12 02:30:03,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 71.05882352941177) internal successors, (1208), 17 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:03,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:03,950 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:03,950 INFO L175 Difference]: Start difference. First operand has 102 places, 72 transitions, 663 flow. Second operand 17 states and 1208 transitions. [2023-11-12 02:30:03,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 138 transitions, 1233 flow [2023-11-12 02:30:03,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1094 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-11-12 02:30:03,964 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 714 flow [2023-11-12 02:30:03,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=714, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2023-11-12 02:30:03,965 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-11-12 02:30:03,966 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 714 flow [2023-11-12 02:30:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 66.94736842105263) internal successors, (1272), 19 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:03,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:03,967 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:03,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:30:04,174 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:04,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash 7024895, now seen corresponding path program 9 times [2023-11-12 02:30:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:04,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506456923] [2023-11-12 02:30:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:04,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506456923] [2023-11-12 02:30:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506456923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460760988] [2023-11-12 02:30:04,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:30:04,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:04,423 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:04,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:30:04,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:30:04,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:04,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:04,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:04,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460760988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:04,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:04,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-12 02:30:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092661579] [2023-11-12 02:30:04,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:04,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:30:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:30:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:30:05,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:05,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 714 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:05,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:05,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:05,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:07,109 INFO L124 PetriNetUnfolderBase]: 353/684 cut-off events. [2023-11-12 02:30:07,109 INFO L125 PetriNetUnfolderBase]: For 5915/5915 co-relation queries the response was YES. [2023-11-12 02:30:07,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3833 conditions, 684 events. 353/684 cut-off events. For 5915/5915 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3290 event pairs, 12 based on Foata normal form. 4/688 useless extension candidates. Maximal degree in co-relation 3790. Up to 193 conditions per place. [2023-11-12 02:30:07,119 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 125 selfloop transitions, 114 changer transitions 16/255 dead transitions. [2023-11-12 02:30:07,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 255 transitions, 2456 flow [2023-11-12 02:30:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-12 02:30:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-12 02:30:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3282 transitions. [2023-11-12 02:30:07,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156534954407295 [2023-11-12 02:30:07,126 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3282 transitions. [2023-11-12 02:30:07,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3282 transitions. [2023-11-12 02:30:07,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:07,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3282 transitions. [2023-11-12 02:30:07,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 69.82978723404256) internal successors, (3282), 47 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:07,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 168.0) internal successors, (8064), 48 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:07,148 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 168.0) internal successors, (8064), 48 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:07,148 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 714 flow. Second operand 47 states and 3282 transitions. [2023-11-12 02:30:07,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 255 transitions, 2456 flow [2023-11-12 02:30:07,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 255 transitions, 2045 flow, removed 168 selfloop flow, removed 15 redundant places. [2023-11-12 02:30:07,173 INFO L231 Difference]: Finished difference. Result has 148 places, 138 transitions, 1466 flow [2023-11-12 02:30:07,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1466, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2023-11-12 02:30:07,174 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-11-12 02:30:07,175 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 1466 flow [2023-11-12 02:30:07,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:07,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:07,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:07,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:07,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:30:07,381 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:07,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:07,381 INFO L85 PathProgramCache]: Analyzing trace with hash -473744403, now seen corresponding path program 10 times [2023-11-12 02:30:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:07,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670606957] [2023-11-12 02:30:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:07,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:07,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670606957] [2023-11-12 02:30:07,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670606957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124632075] [2023-11-12 02:30:07,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:30:07,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:07,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:07,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:30:07,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:30:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:07,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:07,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:07,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124632075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:08,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-12 02:30:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301272164] [2023-11-12 02:30:08,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:30:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:30:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:30:08,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:08,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 1466 flow. Second operand has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:08,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:08,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:08,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:09,477 INFO L124 PetriNetUnfolderBase]: 414/828 cut-off events. [2023-11-12 02:30:09,478 INFO L125 PetriNetUnfolderBase]: For 9752/9752 co-relation queries the response was YES. [2023-11-12 02:30:09,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5100 conditions, 828 events. 414/828 cut-off events. For 9752/9752 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4288 event pairs, 50 based on Foata normal form. 3/831 useless extension candidates. Maximal degree in co-relation 5049. Up to 301 conditions per place. [2023-11-12 02:30:09,491 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 126 selfloop transitions, 81 changer transitions 33/240 dead transitions. [2023-11-12 02:30:09,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 240 transitions, 2611 flow [2023-11-12 02:30:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:30:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-12 02:30:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1638 transitions. [2023-11-12 02:30:09,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2023-11-12 02:30:09,507 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1638 transitions. [2023-11-12 02:30:09,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1638 transitions. [2023-11-12 02:30:09,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:09,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1638 transitions. [2023-11-12 02:30:09,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.21739130434783) internal successors, (1638), 23 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:09,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:09,525 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:09,526 INFO L175 Difference]: Start difference. First operand has 148 places, 138 transitions, 1466 flow. Second operand 23 states and 1638 transitions. [2023-11-12 02:30:09,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 240 transitions, 2611 flow [2023-11-12 02:30:09,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 240 transitions, 1988 flow, removed 234 selfloop flow, removed 23 redundant places. [2023-11-12 02:30:09,580 INFO L231 Difference]: Finished difference. Result has 145 places, 148 transitions, 1168 flow [2023-11-12 02:30:09,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1168, PETRI_PLACES=145, PETRI_TRANSITIONS=148} [2023-11-12 02:30:09,581 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-11-12 02:30:09,581 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 148 transitions, 1168 flow [2023-11-12 02:30:09,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.91666666666667) internal successors, (1606), 24 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:09,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:09,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:09,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:30:09,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:09,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash -14424625, now seen corresponding path program 11 times [2023-11-12 02:30:09,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:09,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443511187] [2023-11-12 02:30:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:09,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443511187] [2023-11-12 02:30:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443511187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:10,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373497825] [2023-11-12 02:30:10,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:30:10,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:10,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:10,059 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:10,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:30:10,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:30:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:10,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:10,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:10,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:10,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373497825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:10,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:10,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-12 02:30:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718900620] [2023-11-12 02:30:10,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:10,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:30:10,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:30:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:30:10,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:10,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 148 transitions, 1168 flow. Second operand has 24 states, 24 states have (on average 66.875) internal successors, (1605), 24 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:10,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:10,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:10,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:13,043 INFO L124 PetriNetUnfolderBase]: 403/797 cut-off events. [2023-11-12 02:30:13,044 INFO L125 PetriNetUnfolderBase]: For 7876/7876 co-relation queries the response was YES. [2023-11-12 02:30:13,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 797 events. 403/797 cut-off events. For 7876/7876 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4046 event pairs, 18 based on Foata normal form. 5/800 useless extension candidates. Maximal degree in co-relation 4242. Up to 183 conditions per place. [2023-11-12 02:30:13,054 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 116 selfloop transitions, 115 changer transitions 25/256 dead transitions. [2023-11-12 02:30:13,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 256 transitions, 2254 flow [2023-11-12 02:30:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-12 02:30:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-12 02:30:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2880 transitions. [2023-11-12 02:30:13,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2023-11-12 02:30:13,059 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2880 transitions. [2023-11-12 02:30:13,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2880 transitions. [2023-11-12 02:30:13,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:13,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2880 transitions. [2023-11-12 02:30:13,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 70.2439024390244) internal successors, (2880), 41 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:13,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 168.0) internal successors, (7056), 42 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:13,084 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 168.0) internal successors, (7056), 42 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:13,084 INFO L175 Difference]: Start difference. First operand has 145 places, 148 transitions, 1168 flow. Second operand 41 states and 2880 transitions. [2023-11-12 02:30:13,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 256 transitions, 2254 flow [2023-11-12 02:30:13,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 256 transitions, 2096 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-12 02:30:13,120 INFO L231 Difference]: Finished difference. Result has 168 places, 143 transitions, 1239 flow [2023-11-12 02:30:13,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1239, PETRI_PLACES=168, PETRI_TRANSITIONS=143} [2023-11-12 02:30:13,121 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-12 02:30:13,121 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 143 transitions, 1239 flow [2023-11-12 02:30:13,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.875) internal successors, (1605), 24 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:13,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:13,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:13,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-12 02:30:13,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:13,327 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:13,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:13,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1047861101, now seen corresponding path program 12 times [2023-11-12 02:30:13,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:13,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263269411] [2023-11-12 02:30:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:13,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263269411] [2023-11-12 02:30:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263269411] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358666038] [2023-11-12 02:30:13,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:30:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:13,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:13,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:30:13,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:30:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:13,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:13,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:13,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358666038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:14,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:14,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-12 02:30:14,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048785051] [2023-11-12 02:30:14,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:14,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:30:14,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:30:14,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:30:14,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:14,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 143 transitions, 1239 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:14,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:14,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:15,313 INFO L124 PetriNetUnfolderBase]: 452/886 cut-off events. [2023-11-12 02:30:15,313 INFO L125 PetriNetUnfolderBase]: For 8830/8830 co-relation queries the response was YES. [2023-11-12 02:30:15,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4987 conditions, 886 events. 452/886 cut-off events. For 8830/8830 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4597 event pairs, 44 based on Foata normal form. 5/887 useless extension candidates. Maximal degree in co-relation 4943. Up to 476 conditions per place. [2023-11-12 02:30:15,324 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 92 selfloop transitions, 89 changer transitions 46/227 dead transitions. [2023-11-12 02:30:15,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 2175 flow [2023-11-12 02:30:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 02:30:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-12 02:30:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2221 transitions. [2023-11-12 02:30:15,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41313244047619047 [2023-11-12 02:30:15,329 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2221 transitions. [2023-11-12 02:30:15,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2221 transitions. [2023-11-12 02:30:15,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:15,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2221 transitions. [2023-11-12 02:30:15,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 69.40625) internal successors, (2221), 32 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 168.0) internal successors, (5544), 33 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,343 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 168.0) internal successors, (5544), 33 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,344 INFO L175 Difference]: Start difference. First operand has 168 places, 143 transitions, 1239 flow. Second operand 32 states and 2221 transitions. [2023-11-12 02:30:15,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 2175 flow [2023-11-12 02:30:15,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 1917 flow, removed 9 selfloop flow, removed 34 redundant places. [2023-11-12 02:30:15,372 INFO L231 Difference]: Finished difference. Result has 166 places, 145 transitions, 1288 flow [2023-11-12 02:30:15,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1288, PETRI_PLACES=166, PETRI_TRANSITIONS=145} [2023-11-12 02:30:15,373 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-11-12 02:30:15,373 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 145 transitions, 1288 flow [2023-11-12 02:30:15,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:15,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:15,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:15,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:15,580 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:15,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1848553808, now seen corresponding path program 2 times [2023-11-12 02:30:15,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:15,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632983339] [2023-11-12 02:30:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:15,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:15,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632983339] [2023-11-12 02:30:15,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632983339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:15,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419342346] [2023-11-12 02:30:15,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:30:15,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:15,776 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:15,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:30:15,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:30:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:15,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:15,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:16,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:16,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419342346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:16,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:16,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-12 02:30:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57192410] [2023-11-12 02:30:16,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:16,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:30:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:30:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:30:16,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:16,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 145 transitions, 1288 flow. Second operand has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:16,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:16,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:16,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:17,177 INFO L124 PetriNetUnfolderBase]: 576/1074 cut-off events. [2023-11-12 02:30:17,178 INFO L125 PetriNetUnfolderBase]: For 12139/12139 co-relation queries the response was YES. [2023-11-12 02:30:17,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6280 conditions, 1074 events. 576/1074 cut-off events. For 12139/12139 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5608 event pairs, 34 based on Foata normal form. 9/1079 useless extension candidates. Maximal degree in co-relation 6232. Up to 587 conditions per place. [2023-11-12 02:30:17,188 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 126 selfloop transitions, 80 changer transitions 53/259 dead transitions. [2023-11-12 02:30:17,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 259 transitions, 2559 flow [2023-11-12 02:30:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:30:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-12 02:30:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1548 transitions. [2023-11-12 02:30:17,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2023-11-12 02:30:17,192 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1548 transitions. [2023-11-12 02:30:17,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1548 transitions. [2023-11-12 02:30:17,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:17,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1548 transitions. [2023-11-12 02:30:17,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.36363636363636) internal successors, (1548), 22 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,201 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,201 INFO L175 Difference]: Start difference. First operand has 166 places, 145 transitions, 1288 flow. Second operand 22 states and 1548 transitions. [2023-11-12 02:30:17,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 259 transitions, 2559 flow [2023-11-12 02:30:17,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 259 transitions, 2383 flow, removed 35 selfloop flow, removed 18 redundant places. [2023-11-12 02:30:17,242 INFO L231 Difference]: Finished difference. Result has 157 places, 168 transitions, 1594 flow [2023-11-12 02:30:17,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1594, PETRI_PLACES=157, PETRI_TRANSITIONS=168} [2023-11-12 02:30:17,243 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-11-12 02:30:17,243 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 168 transitions, 1594 flow [2023-11-12 02:30:17,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.65) internal successors, (1333), 20 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:17,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:17,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-12 02:30:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-12 02:30:17,450 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:17,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1989770304, now seen corresponding path program 3 times [2023-11-12 02:30:17,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:17,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326804991] [2023-11-12 02:30:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:17,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326804991] [2023-11-12 02:30:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326804991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:17,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441169720] [2023-11-12 02:30:17,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:30:17,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:17,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:17,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:17,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:30:17,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:30:17,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:17,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:30:17,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:17,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441169720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:18,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:18,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-12 02:30:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35914316] [2023-11-12 02:30:18,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:18,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:30:18,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:18,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:30:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:30:18,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:18,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 168 transitions, 1594 flow. Second operand has 22 states, 22 states have (on average 66.5) internal successors, (1463), 22 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:18,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:18,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:18,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:19,110 INFO L124 PetriNetUnfolderBase]: 526/1001 cut-off events. [2023-11-12 02:30:19,111 INFO L125 PetriNetUnfolderBase]: For 20697/20697 co-relation queries the response was YES. [2023-11-12 02:30:19,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6719 conditions, 1001 events. 526/1001 cut-off events. For 20697/20697 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5192 event pairs, 80 based on Foata normal form. 8/1009 useless extension candidates. Maximal degree in co-relation 6667. Up to 829 conditions per place. [2023-11-12 02:30:19,123 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 174 selfloop transitions, 44 changer transitions 10/228 dead transitions. [2023-11-12 02:30:19,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 228 transitions, 2472 flow [2023-11-12 02:30:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:30:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-12 02:30:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1461 transitions. [2023-11-12 02:30:19,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141156462585034 [2023-11-12 02:30:19,127 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1461 transitions. [2023-11-12 02:30:19,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1461 transitions. [2023-11-12 02:30:19,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:19,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1461 transitions. [2023-11-12 02:30:19,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 69.57142857142857) internal successors, (1461), 21 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:19,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 168.0) internal successors, (3696), 22 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:19,134 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 168.0) internal successors, (3696), 22 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:19,134 INFO L175 Difference]: Start difference. First operand has 157 places, 168 transitions, 1594 flow. Second operand 21 states and 1461 transitions. [2023-11-12 02:30:19,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 228 transitions, 2472 flow [2023-11-12 02:30:19,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 228 transitions, 2280 flow, removed 57 selfloop flow, removed 10 redundant places. [2023-11-12 02:30:19,226 INFO L231 Difference]: Finished difference. Result has 165 places, 181 transitions, 1744 flow [2023-11-12 02:30:19,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1744, PETRI_PLACES=165, PETRI_TRANSITIONS=181} [2023-11-12 02:30:19,227 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-11-12 02:30:19,227 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 181 transitions, 1744 flow [2023-11-12 02:30:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.5) internal successors, (1463), 22 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:19,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:19,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:19,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:19,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-12 02:30:19,433 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:19,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2017475934, now seen corresponding path program 4 times [2023-11-12 02:30:19,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:19,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744457915] [2023-11-12 02:30:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:19,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:19,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744457915] [2023-11-12 02:30:19,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744457915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:19,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391821618] [2023-11-12 02:30:19,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:30:19,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:19,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:19,639 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:19,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:30:19,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:30:19,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:19,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:19,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:19,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:20,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391821618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:20,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:20,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-12 02:30:20,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979849061] [2023-11-12 02:30:20,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:20,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:30:20,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:30:20,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:30:20,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:20,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 181 transitions, 1744 flow. Second operand has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:20,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:20,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:20,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:21,103 INFO L124 PetriNetUnfolderBase]: 582/1165 cut-off events. [2023-11-12 02:30:21,103 INFO L125 PetriNetUnfolderBase]: For 20972/20972 co-relation queries the response was YES. [2023-11-12 02:30:21,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7068 conditions, 1165 events. 582/1165 cut-off events. For 20972/20972 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6636 event pairs, 42 based on Foata normal form. 6/1171 useless extension candidates. Maximal degree in co-relation 7017. Up to 480 conditions per place. [2023-11-12 02:30:21,116 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 148 selfloop transitions, 148 changer transitions 25/321 dead transitions. [2023-11-12 02:30:21,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 321 transitions, 3385 flow [2023-11-12 02:30:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 02:30:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-12 02:30:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2085 transitions. [2023-11-12 02:30:21,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2023-11-12 02:30:21,121 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2085 transitions. [2023-11-12 02:30:21,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2085 transitions. [2023-11-12 02:30:21,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:21,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2085 transitions. [2023-11-12 02:30:21,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 69.5) internal successors, (2085), 30 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:21,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 168.0) internal successors, (5208), 31 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:21,129 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 168.0) internal successors, (5208), 31 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:21,129 INFO L175 Difference]: Start difference. First operand has 165 places, 181 transitions, 1744 flow. Second operand 30 states and 2085 transitions. [2023-11-12 02:30:21,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 321 transitions, 3385 flow [2023-11-12 02:30:21,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 321 transitions, 3226 flow, removed 58 selfloop flow, removed 8 redundant places. [2023-11-12 02:30:21,197 INFO L231 Difference]: Finished difference. Result has 188 places, 232 transitions, 2598 flow [2023-11-12 02:30:21,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2598, PETRI_PLACES=188, PETRI_TRANSITIONS=232} [2023-11-12 02:30:21,198 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2023-11-12 02:30:21,199 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 232 transitions, 2598 flow [2023-11-12 02:30:21,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:21,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:21,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:21,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:21,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-12 02:30:21,403 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:21,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:21,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1908825840, now seen corresponding path program 5 times [2023-11-12 02:30:21,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:21,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634944299] [2023-11-12 02:30:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:21,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634944299] [2023-11-12 02:30:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634944299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:21,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872549945] [2023-11-12 02:30:21,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:30:21,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:21,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:21,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:30:21,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:30:21,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:21,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:21,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:21,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:22,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872549945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:22,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:22,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-12 02:30:22,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950373085] [2023-11-12 02:30:22,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:22,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:30:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:30:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:30:22,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:22,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 232 transitions, 2598 flow. Second operand has 20 states, 20 states have (on average 66.6) internal successors, (1332), 20 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:22,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:22,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:22,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:23,010 INFO L124 PetriNetUnfolderBase]: 654/1269 cut-off events. [2023-11-12 02:30:23,010 INFO L125 PetriNetUnfolderBase]: For 24917/24917 co-relation queries the response was YES. [2023-11-12 02:30:23,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8319 conditions, 1269 events. 654/1269 cut-off events. For 24917/24917 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7205 event pairs, 23 based on Foata normal form. 10/1279 useless extension candidates. Maximal degree in co-relation 8263. Up to 625 conditions per place. [2023-11-12 02:30:23,024 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 174 selfloop transitions, 92 changer transitions 60/326 dead transitions. [2023-11-12 02:30:23,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 326 transitions, 3956 flow [2023-11-12 02:30:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:30:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-12 02:30:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1536 transitions. [2023-11-12 02:30:23,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2023-11-12 02:30:23,029 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1536 transitions. [2023-11-12 02:30:23,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1536 transitions. [2023-11-12 02:30:23,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:23,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1536 transitions. [2023-11-12 02:30:23,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 69.81818181818181) internal successors, (1536), 22 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:23,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:23,040 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:23,040 INFO L175 Difference]: Start difference. First operand has 188 places, 232 transitions, 2598 flow. Second operand 22 states and 1536 transitions. [2023-11-12 02:30:23,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 326 transitions, 3956 flow [2023-11-12 02:30:23,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 326 transitions, 3257 flow, removed 274 selfloop flow, removed 20 redundant places. [2023-11-12 02:30:23,158 INFO L231 Difference]: Finished difference. Result has 196 places, 232 transitions, 2298 flow [2023-11-12 02:30:23,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2298, PETRI_PLACES=196, PETRI_TRANSITIONS=232} [2023-11-12 02:30:23,159 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-11-12 02:30:23,159 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 232 transitions, 2298 flow [2023-11-12 02:30:23,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.6) internal successors, (1332), 20 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:23,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:23,160 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:23,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-12 02:30:23,366 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:23,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash 329099079, now seen corresponding path program 13 times [2023-11-12 02:30:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268587923] [2023-11-12 02:30:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:23,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268587923] [2023-11-12 02:30:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268587923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923568769] [2023-11-12 02:30:23,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:30:23,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:23,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:23,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:30:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:23,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:23,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:23,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923568769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:24,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:24,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-12 02:30:24,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973423486] [2023-11-12 02:30:24,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:24,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:30:24,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:30:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:30:24,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 168 [2023-11-12 02:30:24,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 232 transitions, 2298 flow. Second operand has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:24,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:24,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 168 [2023-11-12 02:30:24,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:24,954 INFO L124 PetriNetUnfolderBase]: 560/1110 cut-off events. [2023-11-12 02:30:24,954 INFO L125 PetriNetUnfolderBase]: For 6111/6111 co-relation queries the response was YES. [2023-11-12 02:30:24,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5935 conditions, 1110 events. 560/1110 cut-off events. For 6111/6111 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6151 event pairs, 39 based on Foata normal form. 3/1113 useless extension candidates. Maximal degree in co-relation 5877. Up to 1046 conditions per place. [2023-11-12 02:30:24,963 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 224 selfloop transitions, 8 changer transitions 29/261 dead transitions. [2023-11-12 02:30:24,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 261 transitions, 2932 flow [2023-11-12 02:30:24,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:30:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:30:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 967 transitions. [2023-11-12 02:30:24,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-11-12 02:30:24,965 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 967 transitions. [2023-11-12 02:30:24,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 967 transitions. [2023-11-12 02:30:24,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:24,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 967 transitions. [2023-11-12 02:30:24,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:24,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:24,969 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:24,969 INFO L175 Difference]: Start difference. First operand has 196 places, 232 transitions, 2298 flow. Second operand 14 states and 967 transitions. [2023-11-12 02:30:24,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 261 transitions, 2932 flow [2023-11-12 02:30:25,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 261 transitions, 2716 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-11-12 02:30:25,005 INFO L231 Difference]: Finished difference. Result has 174 places, 227 transitions, 2071 flow [2023-11-12 02:30:25,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2071, PETRI_PLACES=174, PETRI_TRANSITIONS=227} [2023-11-12 02:30:25,006 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-12 02:30:25,006 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 227 transitions, 2071 flow [2023-11-12 02:30:25,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 66.83333333333333) internal successors, (1604), 24 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:25,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:25,006 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:25,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:25,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-12 02:30:25,207 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:25,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:25,207 INFO L85 PathProgramCache]: Analyzing trace with hash 833716023, now seen corresponding path program 14 times [2023-11-12 02:30:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:25,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176524928] [2023-11-12 02:30:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176524928] [2023-11-12 02:30:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176524928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128816844] [2023-11-12 02:30:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:30:25,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:25,436 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af2cd9d-554e-4e97-910f-e993e30fc134/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-12 02:30:25,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:30:25,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:25,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:30:25,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:25,838 INFO L327 TraceCheckSpWp]: Computing backward predicates...