./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:56:38,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:56:38,868 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:56:38,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:56:38,875 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:56:38,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:56:38,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:56:38,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:56:38,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:56:38,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:56:38,925 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:56:38,925 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:56:38,926 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:56:38,928 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:56:38,928 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:56:38,929 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:56:38,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:56:38,930 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:56:38,930 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:56:38,930 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:56:38,931 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:56:38,931 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:56:38,932 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:56:38,932 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:56:38,933 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:56:38,934 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:56:38,934 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:56:38,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:56:38,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:38,935 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:56:38,937 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:56:38,937 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:56:38,937 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:56:38,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:56:38,938 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:56:38,938 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:56:38,938 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:56:38,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:56:38,939 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:56:38,939 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_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-19 07:56:39,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:56:39,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:56:39,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:56:39,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:56:39,308 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:56:39,309 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-19 07:56:42,464 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:42,674 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:42,674 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-19 07:56:42,684 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/data/504b49c91/6fe9eb197b344ec0b09b2a6483de6593/FLAGd57035b8d [2023-11-19 07:56:42,703 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/data/504b49c91/6fe9eb197b344ec0b09b2a6483de6593 [2023-11-19 07:56:42,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:42,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:42,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:42,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:42,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:42,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:42,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37406cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42, skipping insertion in model container [2023-11-19 07:56:42,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:42,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:56:42,942 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_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2023-11-19 07:56:42,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:42,959 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:42,977 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_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2023-11-19 07:56:42,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:42,987 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:42,988 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:56:42,994 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:42,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42 WrapperNode [2023-11-19 07:56:42,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:42,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:42,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:42,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:43,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,045 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-19 07:56:43,045 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:43,046 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:43,046 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:43,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:43,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,056 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,056 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,068 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:43,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:43,072 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:43,072 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:43,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (1/1) ... [2023-11-19 07:56:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:43,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:43,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:56:43,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:56:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:56:43,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:56:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:56:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:56:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:56:43,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:56:43,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:43,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:56:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:56:43,168 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:56:43,340 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:43,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:43,553 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:43,620 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:43,620 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:56:43,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:43 BoogieIcfgContainer [2023-11-19 07:56:43,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:43,628 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:43,628 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:43,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:43,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:42" (1/3) ... [2023-11-19 07:56:43,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f641b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:43, skipping insertion in model container [2023-11-19 07:56:43,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:42" (2/3) ... [2023-11-19 07:56:43,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f641b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:43, skipping insertion in model container [2023-11-19 07:56:43,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:43" (3/3) ... [2023-11-19 07:56:43,635 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-19 07:56:43,645 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:56:43,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:43,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:56:43,662 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:56:43,761 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:56:43,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 178 flow [2023-11-19 07:56:43,875 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-11-19 07:56:43,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:43,885 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 4. Compared 50 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-19 07:56:43,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 178 flow [2023-11-19 07:56:43,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-11-19 07:56:43,903 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:56:43,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-11-19 07:56:43,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-11-19 07:56:43,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-11-19 07:56:43,945 INFO L124 PetriNetUnfolderBase]: 6/71 cut-off events. [2023-11-19 07:56:43,945 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:43,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-19 07:56:43,947 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-19 07:56:46,182 INFO L134 LiptonReduction]: Checked pairs total: 494 [2023-11-19 07:56:46,182 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-11-19 07:56:46,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:46,206 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;@175de10b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:46,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:56:46,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:56:46,212 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 07:56:46,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:56:46,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:46,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:46,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:46,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:46,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1646618962, now seen corresponding path program 1 times [2023-11-19 07:56:46,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:46,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777721711] [2023-11-19 07:56:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:46,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:46,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777721711] [2023-11-19 07:56:46,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777721711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:46,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:46,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766656988] [2023-11-19 07:56:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:56:46,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:46,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:56:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:56:46,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 147 [2023-11-19 07:56:46,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:46,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 147 [2023-11-19 07:56:46,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:46,778 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-19 07:56:46,778 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:56:46,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 92 events. 51/92 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 185 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 150. Up to 73 conditions per place. [2023-11-19 07:56:46,781 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-19 07:56:46,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 103 flow [2023-11-19 07:56:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:56:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:56:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-11-19 07:56:46,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2023-11-19 07:56:46,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-11-19 07:56:46,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-11-19 07:56:46,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:46,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-11-19 07:56:46,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,815 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,818 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 291 transitions. [2023-11-19 07:56:46,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 103 flow [2023-11-19 07:56:46,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:56:46,823 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-19 07:56:46,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-19 07:56:46,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-19 07:56:46,829 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-19 07:56:46,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:46,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:46,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:46,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:46,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2145046112, now seen corresponding path program 1 times [2023-11-19 07:56:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:46,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869424260] [2023-11-19 07:56:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:46,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:46,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869424260] [2023-11-19 07:56:46,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869424260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:46,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:46,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:46,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216535799] [2023-11-19 07:56:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:56:46,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:56:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:56:47,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 147 [2023-11-19 07:56:47,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:47,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 147 [2023-11-19 07:56:47,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:47,089 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-19 07:56:47,089 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-19 07:56:47,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 116 events. 65/116 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 268 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 70. Up to 92 conditions per place. [2023-11-19 07:56:47,092 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 07:56:47,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 123 flow [2023-11-19 07:56:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:56:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:56:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2023-11-19 07:56:47,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812925170068027 [2023-11-19 07:56:47,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2023-11-19 07:56:47,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2023-11-19 07:56:47,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:47,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2023-11-19 07:56:47,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,102 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,102 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 283 transitions. [2023-11-19 07:56:47,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 123 flow [2023-11-19 07:56:47,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:56:47,104 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-19 07:56:47,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-19 07:56:47,106 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-19 07:56:47,106 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-19 07:56:47,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:47,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:47,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:56:47,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:47,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1926496266, now seen corresponding path program 1 times [2023-11-19 07:56:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:47,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323376627] [2023-11-19 07:56:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:47,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:47,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323376627] [2023-11-19 07:56:47,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323376627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:47,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055697328] [2023-11-19 07:56:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:47,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:47,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:47,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:47,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:56:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:47,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:56:47,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:47,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055697328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:47,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:47,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-11-19 07:56:47,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170666033] [2023-11-19 07:56:47,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:47,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:47,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:47,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 147 [2023-11-19 07:56:47,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:47,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 147 [2023-11-19 07:56:47,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:48,115 INFO L124 PetriNetUnfolderBase]: 117/211 cut-off events. [2023-11-19 07:56:48,115 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-19 07:56:48,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 211 events. 117/211 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 655 event pairs, 19 based on Foata normal form. 1/166 useless extension candidates. Maximal degree in co-relation 143. Up to 77 conditions per place. [2023-11-19 07:56:48,124 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 32 selfloop transitions, 6 changer transitions 4/42 dead transitions. [2023-11-19 07:56:48,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 216 flow [2023-11-19 07:56:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:56:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:56:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2023-11-19 07:56:48,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425170068027211 [2023-11-19 07:56:48,131 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 319 transitions. [2023-11-19 07:56:48,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 319 transitions. [2023-11-19 07:56:48,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:48,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 319 transitions. [2023-11-19 07:56:48,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,139 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,139 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 4 states and 319 transitions. [2023-11-19 07:56:48,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 216 flow [2023-11-19 07:56:48,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 210 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:56:48,142 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-11-19 07:56:48,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-19 07:56:48,144 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-19 07:56:48,145 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-11-19 07:56:48,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:48,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:48,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:48,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:56:48,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:48,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:48,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1719534460, now seen corresponding path program 2 times [2023-11-19 07:56:48,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:48,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803488253] [2023-11-19 07:56:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:48,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:48,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803488253] [2023-11-19 07:56:48,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803488253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:48,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847280914] [2023-11-19 07:56:48,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:56:48,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:48,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:48,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:48,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:56:48,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:56:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:48,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:56:48,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:48,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:56:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847280914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:48,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-19 07:56:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637567801] [2023-11-19 07:56:48,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:48,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:56:48,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:48,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:56:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:56:49,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 147 [2023-11-19 07:56:49,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:49,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 147 [2023-11-19 07:56:49,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:49,232 INFO L124 PetriNetUnfolderBase]: 143/257 cut-off events. [2023-11-19 07:56:49,232 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-11-19 07:56:49,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 257 events. 143/257 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 811 event pairs, 35 based on Foata normal form. 16/273 useless extension candidates. Maximal degree in co-relation 230. Up to 190 conditions per place. [2023-11-19 07:56:49,236 INFO L140 encePairwiseOnDemand]: 142/147 looper letters, 32 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-11-19 07:56:49,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 255 flow [2023-11-19 07:56:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:56:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:56:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-11-19 07:56:49,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-19 07:56:49,240 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-11-19 07:56:49,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-11-19 07:56:49,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:49,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-11-19 07:56:49,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,246 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 357 transitions. [2023-11-19 07:56:49,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 255 flow [2023-11-19 07:56:49,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 255 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:49,257 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-11-19 07:56:49,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-19 07:56:49,259 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-19 07:56:49,259 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-11-19 07:56:49,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 68.0) internal successors, (748), 11 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:49,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:49,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:49,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:49,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:49,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:49,478 INFO L85 PathProgramCache]: Analyzing trace with hash -513542114, now seen corresponding path program 3 times [2023-11-19 07:56:49,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:49,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751653431] [2023-11-19 07:56:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:49,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:49,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751653431] [2023-11-19 07:56:49,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751653431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:49,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937712230] [2023-11-19 07:56:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:56:49,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:49,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:49,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:56:49,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:56:49,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:49,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:56:49,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:49,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:50,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937712230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:50,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:50,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-19 07:56:50,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94672923] [2023-11-19 07:56:50,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:50,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:56:50,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:50,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:56:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:56:50,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:56:50,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 62.4375) internal successors, (999), 16 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:50,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:56:50,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:50,819 INFO L124 PetriNetUnfolderBase]: 209/372 cut-off events. [2023-11-19 07:56:50,819 INFO L125 PetriNetUnfolderBase]: For 633/633 co-relation queries the response was YES. [2023-11-19 07:56:50,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1407 conditions, 372 events. 209/372 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1356 event pairs, 8 based on Foata normal form. 12/384 useless extension candidates. Maximal degree in co-relation 749. Up to 127 conditions per place. [2023-11-19 07:56:50,823 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 65 selfloop transitions, 43 changer transitions 19/127 dead transitions. [2023-11-19 07:56:50,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 127 transitions, 886 flow [2023-11-19 07:56:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:56:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:56:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1558 transitions. [2023-11-19 07:56:50,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44160997732426305 [2023-11-19 07:56:50,831 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1558 transitions. [2023-11-19 07:56:50,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1558 transitions. [2023-11-19 07:56:50,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:50,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1558 transitions. [2023-11-19 07:56:50,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.91666666666667) internal successors, (1558), 24 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,847 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,847 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 24 states and 1558 transitions. [2023-11-19 07:56:50,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 127 transitions, 886 flow [2023-11-19 07:56:50,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 127 transitions, 868 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:56:50,854 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 523 flow [2023-11-19 07:56:50,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=523, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-19 07:56:50,855 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-19 07:56:50,855 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 523 flow [2023-11-19 07:56:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.4375) internal successors, (999), 16 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:50,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:50,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:51,077 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:51,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash 281033618, now seen corresponding path program 4 times [2023-11-19 07:56:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:51,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741911444] [2023-11-19 07:56:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:51,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:51,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741911444] [2023-11-19 07:56:51,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741911444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740156786] [2023-11-19 07:56:51,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:56:51,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:51,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:51,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:56:51,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:56:51,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:51,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:56:51,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:51,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740156786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:51,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:51,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:56:51,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778202124] [2023-11-19 07:56:51,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:51,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:56:51,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:56:51,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:56:51,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:56:51,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 523 flow. Second operand has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:51,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:51,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:56:51,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:52,072 INFO L124 PetriNetUnfolderBase]: 245/435 cut-off events. [2023-11-19 07:56:52,072 INFO L125 PetriNetUnfolderBase]: For 2443/2443 co-relation queries the response was YES. [2023-11-19 07:56:52,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 435 events. 245/435 cut-off events. For 2443/2443 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1606 event pairs, 9 based on Foata normal form. 30/465 useless extension candidates. Maximal degree in co-relation 1577. Up to 157 conditions per place. [2023-11-19 07:56:52,079 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 75 selfloop transitions, 62 changer transitions 0/137 dead transitions. [2023-11-19 07:56:52,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 1304 flow [2023-11-19 07:56:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:56:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:56:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-11-19 07:56:52,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414607948442535 [2023-11-19 07:56:52,089 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-11-19 07:56:52,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-11-19 07:56:52,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:52,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-11-19 07:56:52,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 147.0) internal successors, (2940), 20 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,105 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 147.0) internal successors, (2940), 20 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,106 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 523 flow. Second operand 19 states and 1233 transitions. [2023-11-19 07:56:52,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 1304 flow [2023-11-19 07:56:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 1053 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-11-19 07:56:52,122 INFO L231 Difference]: Finished difference. Result has 79 places, 98 transitions, 849 flow [2023-11-19 07:56:52,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=849, PETRI_PLACES=79, PETRI_TRANSITIONS=98} [2023-11-19 07:56:52,124 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-11-19 07:56:52,125 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 98 transitions, 849 flow [2023-11-19 07:56:52,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:52,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:52,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:52,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:52,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:52,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1592640530, now seen corresponding path program 5 times [2023-11-19 07:56:52,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:52,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098530050] [2023-11-19 07:56:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:52,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:52,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:52,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098530050] [2023-11-19 07:56:52,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098530050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:52,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937591271] [2023-11-19 07:56:52,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:56:52,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:52,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:52,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:56:52,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:56:52,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:52,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:56:52,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:52,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:52,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937591271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:52,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:52,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:56:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157194276] [2023-11-19 07:56:52,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:56:52,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:56:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:56:52,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:56:52,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 98 transitions, 849 flow. Second operand has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:52,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:52,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:56:52,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:53,426 INFO L124 PetriNetUnfolderBase]: 338/578 cut-off events. [2023-11-19 07:56:53,427 INFO L125 PetriNetUnfolderBase]: For 5665/5665 co-relation queries the response was YES. [2023-11-19 07:56:53,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3249 conditions, 578 events. 338/578 cut-off events. For 5665/5665 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2258 event pairs, 19 based on Foata normal form. 16/594 useless extension candidates. Maximal degree in co-relation 3046. Up to 262 conditions per place. [2023-11-19 07:56:53,435 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 82 selfloop transitions, 95 changer transitions 2/179 dead transitions. [2023-11-19 07:56:53,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 179 transitions, 1883 flow [2023-11-19 07:56:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:56:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:56:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1353 transitions. [2023-11-19 07:56:53,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382896015549077 [2023-11-19 07:56:53,441 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1353 transitions. [2023-11-19 07:56:53,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1353 transitions. [2023-11-19 07:56:53,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:53,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1353 transitions. [2023-11-19 07:56:53,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 147.0) internal successors, (3234), 22 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,457 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 147.0) internal successors, (3234), 22 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,457 INFO L175 Difference]: Start difference. First operand has 79 places, 98 transitions, 849 flow. Second operand 21 states and 1353 transitions. [2023-11-19 07:56:53,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 179 transitions, 1883 flow [2023-11-19 07:56:53,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 179 transitions, 1771 flow, removed 56 selfloop flow, removed 0 redundant places. [2023-11-19 07:56:53,494 INFO L231 Difference]: Finished difference. Result has 106 places, 141 transitions, 1510 flow [2023-11-19 07:56:53,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1510, PETRI_PLACES=106, PETRI_TRANSITIONS=141} [2023-11-19 07:56:53,495 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2023-11-19 07:56:53,496 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 141 transitions, 1510 flow [2023-11-19 07:56:53,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:53,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:53,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:53,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:53,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:53,713 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:53,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1860076362, now seen corresponding path program 6 times [2023-11-19 07:56:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539773991] [2023-11-19 07:56:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:53,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:53,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539773991] [2023-11-19 07:56:53,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539773991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:53,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891790185] [2023-11-19 07:56:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:56:53,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:53,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:53,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:56:53,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:56:53,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:53,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:56:53,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:54,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:54,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891790185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:54,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:54,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-19 07:56:54,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492454457] [2023-11-19 07:56:54,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:54,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:56:54,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:56:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:56:54,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:56:54,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 141 transitions, 1510 flow. Second operand has 16 states, 16 states have (on average 62.4375) internal successors, (999), 16 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:54,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:54,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:56:54,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:54,965 INFO L124 PetriNetUnfolderBase]: 348/618 cut-off events. [2023-11-19 07:56:54,965 INFO L125 PetriNetUnfolderBase]: For 9245/9245 co-relation queries the response was YES. [2023-11-19 07:56:54,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 618 events. 348/618 cut-off events. For 9245/9245 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2610 event pairs, 7 based on Foata normal form. 30/648 useless extension candidates. Maximal degree in co-relation 3429. Up to 214 conditions per place. [2023-11-19 07:56:54,976 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 73 selfloop transitions, 109 changer transitions 3/185 dead transitions. [2023-11-19 07:56:54,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 185 transitions, 2083 flow [2023-11-19 07:56:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:56:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:56:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1483 transitions. [2023-11-19 07:56:54,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386276249630287 [2023-11-19 07:56:54,984 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1483 transitions. [2023-11-19 07:56:54,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1483 transitions. [2023-11-19 07:56:54,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:54,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1483 transitions. [2023-11-19 07:56:54,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.47826086956522) internal successors, (1483), 23 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:55,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 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) [2023-11-19 07:56:55,004 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 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) [2023-11-19 07:56:55,004 INFO L175 Difference]: Start difference. First operand has 106 places, 141 transitions, 1510 flow. Second operand 23 states and 1483 transitions. [2023-11-19 07:56:55,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 185 transitions, 2083 flow [2023-11-19 07:56:55,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 185 transitions, 1840 flow, removed 102 selfloop flow, removed 9 redundant places. [2023-11-19 07:56:55,082 INFO L231 Difference]: Finished difference. Result has 122 places, 142 transitions, 1578 flow [2023-11-19 07:56:55,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1578, PETRI_PLACES=122, PETRI_TRANSITIONS=142} [2023-11-19 07:56:55,083 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-11-19 07:56:55,083 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 142 transitions, 1578 flow [2023-11-19 07:56:55,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.4375) internal successors, (999), 16 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:55,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:55,084 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:55,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:55,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:55,306 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:55,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash 536917468, now seen corresponding path program 7 times [2023-11-19 07:56:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:55,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112676884] [2023-11-19 07:56:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:55,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:55,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112676884] [2023-11-19 07:56:55,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112676884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067445519] [2023-11-19 07:56:55,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:56:55,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:55,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:55,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:55,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:56:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:55,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:56:55,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:55,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:55,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067445519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:55,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:55,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:56:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500950702] [2023-11-19 07:56:55,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:56:55,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:55,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:56:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:56:55,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:56:55,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 142 transitions, 1578 flow. Second operand has 18 states, 18 states have (on average 62.27777777777778) internal successors, (1121), 18 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:55,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:55,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:56:55,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:56,760 INFO L124 PetriNetUnfolderBase]: 495/871 cut-off events. [2023-11-19 07:56:56,761 INFO L125 PetriNetUnfolderBase]: For 4647/4647 co-relation queries the response was YES. [2023-11-19 07:56:56,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4965 conditions, 871 events. 495/871 cut-off events. For 4647/4647 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4023 event pairs, 11 based on Foata normal form. 10/881 useless extension candidates. Maximal degree in co-relation 4815. Up to 262 conditions per place. [2023-11-19 07:56:56,774 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 110 selfloop transitions, 150 changer transitions 0/260 dead transitions. [2023-11-19 07:56:56,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 260 transitions, 3066 flow [2023-11-19 07:56:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:56:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-19 07:56:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1863 transitions. [2023-11-19 07:56:56,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370161857846587 [2023-11-19 07:56:56,784 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1863 transitions. [2023-11-19 07:56:56,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1863 transitions. [2023-11-19 07:56:56,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:56,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1863 transitions. [2023-11-19 07:56:56,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 64.24137931034483) internal successors, (1863), 29 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:56,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 147.0) internal successors, (4410), 30 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:56,804 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 147.0) internal successors, (4410), 30 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:56,804 INFO L175 Difference]: Start difference. First operand has 122 places, 142 transitions, 1578 flow. Second operand 29 states and 1863 transitions. [2023-11-19 07:56:56,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 260 transitions, 3066 flow [2023-11-19 07:56:56,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 260 transitions, 2830 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-11-19 07:56:56,843 INFO L231 Difference]: Finished difference. Result has 139 places, 208 transitions, 2584 flow [2023-11-19 07:56:56,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2584, PETRI_PLACES=139, PETRI_TRANSITIONS=208} [2023-11-19 07:56:56,844 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-11-19 07:56:56,844 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 208 transitions, 2584 flow [2023-11-19 07:56:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 62.27777777777778) internal successors, (1121), 18 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:56,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:56,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:56,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:57,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:56:57,070 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:57,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2011453820, now seen corresponding path program 8 times [2023-11-19 07:56:57,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:57,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173985256] [2023-11-19 07:56:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:57,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:57,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173985256] [2023-11-19 07:56:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173985256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554044731] [2023-11-19 07:56:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:56:57,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:57,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:57,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:56:57,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:56:57,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:57,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:56:57,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:57,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554044731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:57,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:57,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-19 07:56:57,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136423571] [2023-11-19 07:56:57,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:57,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:56:57,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:56:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:56:57,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:56:57,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 208 transitions, 2584 flow. Second operand has 18 states, 18 states have (on average 62.05555555555556) internal successors, (1117), 18 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:57,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:57,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:56:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:58,393 INFO L124 PetriNetUnfolderBase]: 579/1033 cut-off events. [2023-11-19 07:56:58,393 INFO L125 PetriNetUnfolderBase]: For 8038/8038 co-relation queries the response was YES. [2023-11-19 07:56:58,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6543 conditions, 1033 events. 579/1033 cut-off events. For 8038/8038 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5078 event pairs, 19 based on Foata normal form. 42/1075 useless extension candidates. Maximal degree in co-relation 6122. Up to 731 conditions per place. [2023-11-19 07:56:58,411 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 211 selfloop transitions, 78 changer transitions 1/290 dead transitions. [2023-11-19 07:56:58,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 290 transitions, 3868 flow [2023-11-19 07:56:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:56:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:56:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1556 transitions. [2023-11-19 07:56:58,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410430839002268 [2023-11-19 07:56:58,416 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1556 transitions. [2023-11-19 07:56:58,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1556 transitions. [2023-11-19 07:56:58,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:58,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1556 transitions. [2023-11-19 07:56:58,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.83333333333333) internal successors, (1556), 24 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:58,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:58,430 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 147.0) internal successors, (3675), 25 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:58,430 INFO L175 Difference]: Start difference. First operand has 139 places, 208 transitions, 2584 flow. Second operand 24 states and 1556 transitions. [2023-11-19 07:56:58,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 290 transitions, 3868 flow [2023-11-19 07:56:58,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 290 transitions, 3704 flow, removed 42 selfloop flow, removed 13 redundant places. [2023-11-19 07:56:58,495 INFO L231 Difference]: Finished difference. Result has 160 places, 240 transitions, 3150 flow [2023-11-19 07:56:58,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3150, PETRI_PLACES=160, PETRI_TRANSITIONS=240} [2023-11-19 07:56:58,496 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 140 predicate places. [2023-11-19 07:56:58,497 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 240 transitions, 3150 flow [2023-11-19 07:56:58,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 62.05555555555556) internal successors, (1117), 18 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:58,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:58,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:58,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:58,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:56:58,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:56:58,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1154564440, now seen corresponding path program 9 times [2023-11-19 07:56:58,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:58,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223382103] [2023-11-19 07:56:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:58,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:58,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:58,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223382103] [2023-11-19 07:56:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223382103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:58,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479736233] [2023-11-19 07:56:58,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:56:58,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:58,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:58,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:58,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:56:59,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:56:59,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:59,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:56:59,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:59,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:59,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479736233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:59,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:59,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-19 07:56:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192013383] [2023-11-19 07:56:59,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:56:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:56:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:56:59,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:56:59,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 240 transitions, 3150 flow. Second operand has 16 states, 16 states have (on average 62.25) internal successors, (996), 16 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:59,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:56:59,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:56:59,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:56:59,795 INFO L124 PetriNetUnfolderBase]: 573/1007 cut-off events. [2023-11-19 07:56:59,796 INFO L125 PetriNetUnfolderBase]: For 9451/9451 co-relation queries the response was YES. [2023-11-19 07:56:59,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 1007 events. 573/1007 cut-off events. For 9451/9451 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4862 event pairs, 21 based on Foata normal form. 6/1013 useless extension candidates. Maximal degree in co-relation 6508. Up to 782 conditions per place. [2023-11-19 07:56:59,813 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 195 selfloop transitions, 69 changer transitions 4/268 dead transitions. [2023-11-19 07:56:59,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3985 flow [2023-11-19 07:56:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:56:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:56:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 900 transitions. [2023-11-19 07:56:59,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43731778425655976 [2023-11-19 07:56:59,817 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 900 transitions. [2023-11-19 07:56:59,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 900 transitions. [2023-11-19 07:56:59,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:56:59,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 900 transitions. [2023-11-19 07:56:59,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 64.28571428571429) internal successors, (900), 14 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:59,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 147.0) internal successors, (2205), 15 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:59,824 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 147.0) internal successors, (2205), 15 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:59,825 INFO L175 Difference]: Start difference. First operand has 160 places, 240 transitions, 3150 flow. Second operand 14 states and 900 transitions. [2023-11-19 07:56:59,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3985 flow [2023-11-19 07:56:59,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 268 transitions, 3708 flow, removed 110 selfloop flow, removed 9 redundant places. [2023-11-19 07:56:59,959 INFO L231 Difference]: Finished difference. Result has 166 places, 244 transitions, 3129 flow [2023-11-19 07:56:59,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3129, PETRI_PLACES=166, PETRI_TRANSITIONS=244} [2023-11-19 07:56:59,960 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-11-19 07:56:59,960 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 244 transitions, 3129 flow [2023-11-19 07:56:59,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.25) internal successors, (996), 16 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:59,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:56:59,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:59,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:00,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:57:00,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:00,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1231867616, now seen corresponding path program 10 times [2023-11-19 07:57:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:00,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956050616] [2023-11-19 07:57:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:00,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:00,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956050616] [2023-11-19 07:57:00,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956050616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:00,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070691893] [2023-11-19 07:57:00,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:57:00,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:00,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:00,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:57:00,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:57:00,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:00,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:57:00,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:00,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070691893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:00,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:00,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-11-19 07:57:00,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121442818] [2023-11-19 07:57:00,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:00,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:57:00,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:00,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:57:00,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:57:00,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 147 [2023-11-19 07:57:00,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 244 transitions, 3129 flow. Second operand has 10 states, 10 states have (on average 68.4) internal successors, (684), 10 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:00,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:00,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 147 [2023-11-19 07:57:00,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:01,093 INFO L124 PetriNetUnfolderBase]: 836/1459 cut-off events. [2023-11-19 07:57:01,094 INFO L125 PetriNetUnfolderBase]: For 13450/13450 co-relation queries the response was YES. [2023-11-19 07:57:01,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9868 conditions, 1459 events. 836/1459 cut-off events. For 13450/13450 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7655 event pairs, 30 based on Foata normal form. 1/1460 useless extension candidates. Maximal degree in co-relation 9387. Up to 767 conditions per place. [2023-11-19 07:57:01,116 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 239 selfloop transitions, 98 changer transitions 45/382 dead transitions. [2023-11-19 07:57:01,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 382 transitions, 5576 flow [2023-11-19 07:57:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:57:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:57:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 445 transitions. [2023-11-19 07:57:01,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045351473922902 [2023-11-19 07:57:01,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 445 transitions. [2023-11-19 07:57:01,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 445 transitions. [2023-11-19 07:57:01,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:01,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 445 transitions. [2023-11-19 07:57:01,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:01,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:01,122 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:01,122 INFO L175 Difference]: Start difference. First operand has 166 places, 244 transitions, 3129 flow. Second operand 6 states and 445 transitions. [2023-11-19 07:57:01,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 382 transitions, 5576 flow [2023-11-19 07:57:01,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 382 transitions, 5340 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-11-19 07:57:01,228 INFO L231 Difference]: Finished difference. Result has 166 places, 294 transitions, 4070 flow [2023-11-19 07:57:01,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4070, PETRI_PLACES=166, PETRI_TRANSITIONS=294} [2023-11-19 07:57:01,229 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-11-19 07:57:01,230 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 294 transitions, 4070 flow [2023-11-19 07:57:01,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 68.4) internal successors, (684), 10 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:01,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:01,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:01,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:01,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:57:01,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:01,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash 536202016, now seen corresponding path program 11 times [2023-11-19 07:57:01,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:01,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705115640] [2023-11-19 07:57:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:01,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705115640] [2023-11-19 07:57:01,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705115640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:01,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519738035] [2023-11-19 07:57:01,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:57:01,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:01,695 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:57:01,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:57:01,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:01,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:57:01,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:01,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:57:01,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519738035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:01,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:01,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-11-19 07:57:01,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891427749] [2023-11-19 07:57:01,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:01,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:57:01,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:57:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:57:01,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:01,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 294 transitions, 4070 flow. Second operand has 13 states, 13 states have (on average 62.76923076923077) internal successors, (816), 13 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:01,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:01,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:01,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:02,645 INFO L124 PetriNetUnfolderBase]: 807/1444 cut-off events. [2023-11-19 07:57:02,646 INFO L125 PetriNetUnfolderBase]: For 16639/16639 co-relation queries the response was YES. [2023-11-19 07:57:02,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10438 conditions, 1444 events. 807/1444 cut-off events. For 16639/16639 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7813 event pairs, 43 based on Foata normal form. 34/1478 useless extension candidates. Maximal degree in co-relation 10094. Up to 1095 conditions per place. [2023-11-19 07:57:02,668 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 264 selfloop transitions, 86 changer transitions 16/366 dead transitions. [2023-11-19 07:57:02,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 366 transitions, 5568 flow [2023-11-19 07:57:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:57:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:57:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1244 transitions. [2023-11-19 07:57:02,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44539921231650553 [2023-11-19 07:57:02,672 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1244 transitions. [2023-11-19 07:57:02,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1244 transitions. [2023-11-19 07:57:02,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:02,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1244 transitions. [2023-11-19 07:57:02,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.47368421052632) internal successors, (1244), 19 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:02,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 147.0) internal successors, (2940), 20 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:02,698 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 147.0) internal successors, (2940), 20 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:02,699 INFO L175 Difference]: Start difference. First operand has 166 places, 294 transitions, 4070 flow. Second operand 19 states and 1244 transitions. [2023-11-19 07:57:02,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 366 transitions, 5568 flow [2023-11-19 07:57:02,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 366 transitions, 5483 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-11-19 07:57:02,810 INFO L231 Difference]: Finished difference. Result has 188 places, 309 transitions, 4580 flow [2023-11-19 07:57:02,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=4013, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4580, PETRI_PLACES=188, PETRI_TRANSITIONS=309} [2023-11-19 07:57:02,812 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2023-11-19 07:57:02,812 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 309 transitions, 4580 flow [2023-11-19 07:57:02,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.76923076923077) internal successors, (816), 13 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:02,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:02,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:02,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:03,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:57:03,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:03,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:03,038 INFO L85 PathProgramCache]: Analyzing trace with hash -203574864, now seen corresponding path program 12 times [2023-11-19 07:57:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:03,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718268780] [2023-11-19 07:57:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:03,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:03,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:03,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718268780] [2023-11-19 07:57:03,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718268780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:03,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778355289] [2023-11-19 07:57:03,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:57:03,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:03,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:03,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:03,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:57:03,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:57:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:03,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:57:03,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:03,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:03,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778355289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:03,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:03,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-19 07:57:03,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771173605] [2023-11-19 07:57:03,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:03,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:57:03,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:03,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:57:03,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:57:03,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:03,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 309 transitions, 4580 flow. Second operand has 21 states, 21 states have (on average 62.19047619047619) internal successors, (1306), 21 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:03,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:03,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:03,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:05,267 INFO L124 PetriNetUnfolderBase]: 1056/1885 cut-off events. [2023-11-19 07:57:05,267 INFO L125 PetriNetUnfolderBase]: For 25405/25405 co-relation queries the response was YES. [2023-11-19 07:57:05,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14186 conditions, 1885 events. 1056/1885 cut-off events. For 25405/25405 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10695 event pairs, 2 based on Foata normal form. 18/1903 useless extension candidates. Maximal degree in co-relation 13810. Up to 550 conditions per place. [2023-11-19 07:57:05,303 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 137 selfloop transitions, 353 changer transitions 34/524 dead transitions. [2023-11-19 07:57:05,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 524 transitions, 8186 flow [2023-11-19 07:57:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 07:57:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-19 07:57:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2199 transitions. [2023-11-19 07:57:05,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399759903961585 [2023-11-19 07:57:05,309 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2199 transitions. [2023-11-19 07:57:05,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2199 transitions. [2023-11-19 07:57:05,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:05,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2199 transitions. [2023-11-19 07:57:05,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.67647058823529) internal successors, (2199), 34 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:05,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 147.0) internal successors, (5145), 35 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:05,324 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 147.0) internal successors, (5145), 35 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:05,325 INFO L175 Difference]: Start difference. First operand has 188 places, 309 transitions, 4580 flow. Second operand 34 states and 2199 transitions. [2023-11-19 07:57:05,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 524 transitions, 8186 flow [2023-11-19 07:57:05,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 524 transitions, 8028 flow, removed 25 selfloop flow, removed 7 redundant places. [2023-11-19 07:57:05,495 INFO L231 Difference]: Finished difference. Result has 223 places, 415 transitions, 7160 flow [2023-11-19 07:57:05,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7160, PETRI_PLACES=223, PETRI_TRANSITIONS=415} [2023-11-19 07:57:05,497 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-11-19 07:57:05,497 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 415 transitions, 7160 flow [2023-11-19 07:57:05,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.19047619047619) internal successors, (1306), 21 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:05,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:05,498 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:05,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:05,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:57:05,699 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:05,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash -511487398, now seen corresponding path program 13 times [2023-11-19 07:57:05,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:05,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448294395] [2023-11-19 07:57:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:05,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448294395] [2023-11-19 07:57:05,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448294395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164707167] [2023-11-19 07:57:05,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:57:05,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:05,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:05,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:05,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:57:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:06,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:57:06,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:06,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:06,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164707167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:06,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-19 07:57:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294355702] [2023-11-19 07:57:06,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:06,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:57:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:57:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:57:06,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:06,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 415 transitions, 7160 flow. Second operand has 22 states, 22 states have (on average 62.18181818181818) internal successors, (1368), 22 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:06,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:06,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:06,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:07,745 INFO L124 PetriNetUnfolderBase]: 1167/2014 cut-off events. [2023-11-19 07:57:07,745 INFO L125 PetriNetUnfolderBase]: For 36020/36020 co-relation queries the response was YES. [2023-11-19 07:57:07,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17257 conditions, 2014 events. 1167/2014 cut-off events. For 36020/36020 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10951 event pairs, 23 based on Foata normal form. 32/2046 useless extension candidates. Maximal degree in co-relation 16603. Up to 691 conditions per place. [2023-11-19 07:57:07,777 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 160 selfloop transitions, 387 changer transitions 2/549 dead transitions. [2023-11-19 07:57:07,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 549 transitions, 9953 flow [2023-11-19 07:57:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:57:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-19 07:57:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2063 transitions. [2023-11-19 07:57:07,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438562925170068 [2023-11-19 07:57:07,783 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2063 transitions. [2023-11-19 07:57:07,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2063 transitions. [2023-11-19 07:57:07,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:07,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2063 transitions. [2023-11-19 07:57:07,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.46875) internal successors, (2063), 32 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:07,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 147.0) internal successors, (4851), 33 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:07,797 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 147.0) internal successors, (4851), 33 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:07,797 INFO L175 Difference]: Start difference. First operand has 223 places, 415 transitions, 7160 flow. Second operand 32 states and 2063 transitions. [2023-11-19 07:57:07,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 549 transitions, 9953 flow [2023-11-19 07:57:08,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 549 transitions, 9451 flow, removed 223 selfloop flow, removed 9 redundant places. [2023-11-19 07:57:08,094 INFO L231 Difference]: Finished difference. Result has 254 places, 484 transitions, 9113 flow [2023-11-19 07:57:08,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=6821, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9113, PETRI_PLACES=254, PETRI_TRANSITIONS=484} [2023-11-19 07:57:08,095 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2023-11-19 07:57:08,095 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 484 transitions, 9113 flow [2023-11-19 07:57:08,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.18181818181818) internal successors, (1368), 22 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:08,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:08,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:08,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:57:08,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:08,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:08,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1833579958, now seen corresponding path program 14 times [2023-11-19 07:57:08,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:08,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538272225] [2023-11-19 07:57:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:08,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538272225] [2023-11-19 07:57:08,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538272225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:08,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184845569] [2023-11-19 07:57:08,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:57:08,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:08,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:08,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:57:08,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:57:08,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:08,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:57:08,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:08,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:08,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184845569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:08,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:08,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-19 07:57:08,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845288035] [2023-11-19 07:57:08,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:08,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:57:08,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:08,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:57:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:57:09,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:09,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 484 transitions, 9113 flow. Second operand has 22 states, 22 states have (on average 62.18181818181818) internal successors, (1368), 22 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:09,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:09,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:09,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:10,464 INFO L124 PetriNetUnfolderBase]: 1312/2279 cut-off events. [2023-11-19 07:57:10,464 INFO L125 PetriNetUnfolderBase]: For 46510/46510 co-relation queries the response was YES. [2023-11-19 07:57:10,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20444 conditions, 2279 events. 1312/2279 cut-off events. For 46510/46510 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12915 event pairs, 11 based on Foata normal form. 36/2315 useless extension candidates. Maximal degree in co-relation 19995. Up to 631 conditions per place. [2023-11-19 07:57:10,495 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 152 selfloop transitions, 448 changer transitions 15/615 dead transitions. [2023-11-19 07:57:10,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 615 transitions, 12084 flow [2023-11-19 07:57:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 07:57:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-19 07:57:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2125 transitions. [2023-11-19 07:57:10,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380540094825809 [2023-11-19 07:57:10,500 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2125 transitions. [2023-11-19 07:57:10,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2125 transitions. [2023-11-19 07:57:10,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:10,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2125 transitions. [2023-11-19 07:57:10,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.39393939393939) internal successors, (2125), 33 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:10,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 147.0) internal successors, (4998), 34 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:10,514 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 147.0) internal successors, (4998), 34 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:10,514 INFO L175 Difference]: Start difference. First operand has 254 places, 484 transitions, 9113 flow. Second operand 33 states and 2125 transitions. [2023-11-19 07:57:10,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 615 transitions, 12084 flow [2023-11-19 07:57:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 615 transitions, 11785 flow, removed 112 selfloop flow, removed 10 redundant places. [2023-11-19 07:57:10,986 INFO L231 Difference]: Finished difference. Result has 284 places, 536 transitions, 11066 flow [2023-11-19 07:57:10,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=8888, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11066, PETRI_PLACES=284, PETRI_TRANSITIONS=536} [2023-11-19 07:57:10,987 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 264 predicate places. [2023-11-19 07:57:10,987 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 536 transitions, 11066 flow [2023-11-19 07:57:10,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.18181818181818) internal successors, (1368), 22 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:10,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:10,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:11,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:11,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:57:11,210 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:11,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:11,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1149780426, now seen corresponding path program 15 times [2023-11-19 07:57:11,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:11,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478248535] [2023-11-19 07:57:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:11,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478248535] [2023-11-19 07:57:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478248535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458850360] [2023-11-19 07:57:11,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:57:11,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:11,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:11,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:11,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:57:11,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:57:11,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:11,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:57:11,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:11,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458850360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:11,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:11,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-19 07:57:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173915801] [2023-11-19 07:57:11,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:11,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:57:11,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:57:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:57:12,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:12,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 536 transitions, 11066 flow. Second operand has 21 states, 21 states have (on average 61.95238095238095) internal successors, (1301), 21 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:12,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:12,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:12,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:13,697 INFO L124 PetriNetUnfolderBase]: 1440/2465 cut-off events. [2023-11-19 07:57:13,697 INFO L125 PetriNetUnfolderBase]: For 64981/64981 co-relation queries the response was YES. [2023-11-19 07:57:13,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24812 conditions, 2465 events. 1440/2465 cut-off events. For 64981/64981 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13950 event pairs, 50 based on Foata normal form. 36/2501 useless extension candidates. Maximal degree in co-relation 24331. Up to 1188 conditions per place. [2023-11-19 07:57:13,812 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 192 selfloop transitions, 458 changer transitions 7/657 dead transitions. [2023-11-19 07:57:13,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 657 transitions, 14848 flow [2023-11-19 07:57:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:57:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-19 07:57:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1735 transitions. [2023-11-19 07:57:13,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437137818090199 [2023-11-19 07:57:13,817 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1735 transitions. [2023-11-19 07:57:13,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1735 transitions. [2023-11-19 07:57:13,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:13,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1735 transitions. [2023-11-19 07:57:13,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.25925925925925) internal successors, (1735), 27 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:13,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 147.0) internal successors, (4116), 28 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:13,830 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 147.0) internal successors, (4116), 28 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:13,830 INFO L175 Difference]: Start difference. First operand has 284 places, 536 transitions, 11066 flow. Second operand 27 states and 1735 transitions. [2023-11-19 07:57:13,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 657 transitions, 14848 flow [2023-11-19 07:57:14,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 657 transitions, 14147 flow, removed 80 selfloop flow, removed 21 redundant places. [2023-11-19 07:57:14,444 INFO L231 Difference]: Finished difference. Result has 292 places, 610 transitions, 13445 flow [2023-11-19 07:57:14,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=10416, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13445, PETRI_PLACES=292, PETRI_TRANSITIONS=610} [2023-11-19 07:57:14,445 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 272 predicate places. [2023-11-19 07:57:14,445 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 610 transitions, 13445 flow [2023-11-19 07:57:14,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.95238095238095) internal successors, (1301), 21 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:14,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:14,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:14,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:14,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:57:14,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:14,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash -291500542, now seen corresponding path program 16 times [2023-11-19 07:57:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:14,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613868239] [2023-11-19 07:57:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613868239] [2023-11-19 07:57:14,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613868239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689913325] [2023-11-19 07:57:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:57:14,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:14,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:14,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:57:14,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:57:14,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:14,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:57:14,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:15,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:15,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689913325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:15,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:15,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-19 07:57:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876159727] [2023-11-19 07:57:15,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:15,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:57:15,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:15,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:57:15,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:57:15,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:15,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 610 transitions, 13445 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:15,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:15,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:15,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:17,434 INFO L124 PetriNetUnfolderBase]: 1570/2693 cut-off events. [2023-11-19 07:57:17,434 INFO L125 PetriNetUnfolderBase]: For 82446/82446 co-relation queries the response was YES. [2023-11-19 07:57:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27715 conditions, 2693 events. 1570/2693 cut-off events. For 82446/82446 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 15622 event pairs, 21 based on Foata normal form. 44/2737 useless extension candidates. Maximal degree in co-relation 26823. Up to 927 conditions per place. [2023-11-19 07:57:17,493 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 259 selfloop transitions, 483 changer transitions 2/744 dead transitions. [2023-11-19 07:57:17,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 744 transitions, 17075 flow [2023-11-19 07:57:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 07:57:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-19 07:57:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2188 transitions. [2023-11-19 07:57:17,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377751100440176 [2023-11-19 07:57:17,500 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2188 transitions. [2023-11-19 07:57:17,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2188 transitions. [2023-11-19 07:57:17,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:17,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2188 transitions. [2023-11-19 07:57:17,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.3529411764706) internal successors, (2188), 34 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:17,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 147.0) internal successors, (5145), 35 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:17,518 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 147.0) internal successors, (5145), 35 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:17,519 INFO L175 Difference]: Start difference. First operand has 292 places, 610 transitions, 13445 flow. Second operand 34 states and 2188 transitions. [2023-11-19 07:57:17,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 744 transitions, 17075 flow [2023-11-19 07:57:18,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 744 transitions, 16218 flow, removed 340 selfloop flow, removed 12 redundant places. [2023-11-19 07:57:18,275 INFO L231 Difference]: Finished difference. Result has 315 places, 671 transitions, 15472 flow [2023-11-19 07:57:18,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=12560, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15472, PETRI_PLACES=315, PETRI_TRANSITIONS=671} [2023-11-19 07:57:18,276 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-11-19 07:57:18,276 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 671 transitions, 15472 flow [2023-11-19 07:57:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:18,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:18,277 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:18,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-19 07:57:18,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:57:18,478 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:18,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -466328008, now seen corresponding path program 17 times [2023-11-19 07:57:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:18,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104635447] [2023-11-19 07:57:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:18,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:18,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104635447] [2023-11-19 07:57:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104635447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090152268] [2023-11-19 07:57:18,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:57:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:18,711 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:18,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:57:18,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:57:18,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:18,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:57:18,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:18,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:19,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090152268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:19,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:19,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-19 07:57:19,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377773238] [2023-11-19 07:57:19,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:19,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:57:19,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:19,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:57:19,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:57:19,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:19,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 671 transitions, 15472 flow. Second operand has 23 states, 23 states have (on average 62.04347826086956) internal successors, (1427), 23 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:19,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:19,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:19,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:21,617 INFO L124 PetriNetUnfolderBase]: 1987/3404 cut-off events. [2023-11-19 07:57:21,618 INFO L125 PetriNetUnfolderBase]: For 69169/69169 co-relation queries the response was YES. [2023-11-19 07:57:21,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34824 conditions, 3404 events. 1987/3404 cut-off events. For 69169/69169 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 20695 event pairs, 11 based on Foata normal form. 34/3438 useless extension candidates. Maximal degree in co-relation 34397. Up to 885 conditions per place. [2023-11-19 07:57:21,664 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 194 selfloop transitions, 727 changer transitions 12/933 dead transitions. [2023-11-19 07:57:21,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 933 transitions, 22464 flow [2023-11-19 07:57:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:57:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-19 07:57:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2313 transitions. [2023-11-19 07:57:21,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370748299319728 [2023-11-19 07:57:21,674 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2313 transitions. [2023-11-19 07:57:21,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2313 transitions. [2023-11-19 07:57:21,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:21,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2313 transitions. [2023-11-19 07:57:21,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.25) internal successors, (2313), 36 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:21,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 147.0) internal successors, (5439), 37 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:21,697 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 147.0) internal successors, (5439), 37 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:21,698 INFO L175 Difference]: Start difference. First operand has 315 places, 671 transitions, 15472 flow. Second operand 36 states and 2313 transitions. [2023-11-19 07:57:21,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 933 transitions, 22464 flow [2023-11-19 07:57:22,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 933 transitions, 22043 flow, removed 98 selfloop flow, removed 21 redundant places. [2023-11-19 07:57:22,608 INFO L231 Difference]: Finished difference. Result has 340 places, 855 transitions, 21629 flow [2023-11-19 07:57:22,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=15183, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21629, PETRI_PLACES=340, PETRI_TRANSITIONS=855} [2023-11-19 07:57:22,609 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-11-19 07:57:22,609 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 855 transitions, 21629 flow [2023-11-19 07:57:22,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.04347826086956) internal successors, (1427), 23 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:22,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:22,610 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:22,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:22,834 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:22,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash -900009910, now seen corresponding path program 18 times [2023-11-19 07:57:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:22,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011527720] [2023-11-19 07:57:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:23,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011527720] [2023-11-19 07:57:23,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011527720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215738823] [2023-11-19 07:57:23,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:57:23,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:23,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:23,045 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:23,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:57:23,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:57:23,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:23,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:57:23,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:23,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215738823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:23,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:23,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-19 07:57:23,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569248623] [2023-11-19 07:57:23,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:23,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:57:23,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:57:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:57:23,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:23,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 855 transitions, 21629 flow. Second operand has 23 states, 23 states have (on average 62.04347826086956) internal successors, (1427), 23 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:23,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:23,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:26,615 INFO L124 PetriNetUnfolderBase]: 2161/3718 cut-off events. [2023-11-19 07:57:26,615 INFO L125 PetriNetUnfolderBase]: For 84592/84592 co-relation queries the response was YES. [2023-11-19 07:57:26,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41108 conditions, 3718 events. 2161/3718 cut-off events. For 84592/84592 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23105 event pairs, 29 based on Foata normal form. 10/3728 useless extension candidates. Maximal degree in co-relation 40635. Up to 1229 conditions per place. [2023-11-19 07:57:26,667 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 322 selfloop transitions, 694 changer transitions 0/1016 dead transitions. [2023-11-19 07:57:26,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1016 transitions, 26334 flow [2023-11-19 07:57:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-19 07:57:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-19 07:57:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2378 transitions. [2023-11-19 07:57:26,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43721272292700863 [2023-11-19 07:57:26,672 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2378 transitions. [2023-11-19 07:57:26,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2378 transitions. [2023-11-19 07:57:26,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:26,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2378 transitions. [2023-11-19 07:57:26,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.27027027027027) internal successors, (2378), 37 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:26,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 147.0) internal successors, (5586), 38 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:26,685 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 147.0) internal successors, (5586), 38 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:26,686 INFO L175 Difference]: Start difference. First operand has 340 places, 855 transitions, 21629 flow. Second operand 37 states and 2378 transitions. [2023-11-19 07:57:26,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1016 transitions, 26334 flow [2023-11-19 07:57:27,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1016 transitions, 25781 flow, removed 186 selfloop flow, removed 16 redundant places. [2023-11-19 07:57:27,906 INFO L231 Difference]: Finished difference. Result has 366 places, 941 transitions, 25204 flow [2023-11-19 07:57:27,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=21134, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=25204, PETRI_PLACES=366, PETRI_TRANSITIONS=941} [2023-11-19 07:57:27,907 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 346 predicate places. [2023-11-19 07:57:27,907 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 941 transitions, 25204 flow [2023-11-19 07:57:27,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.04347826086956) internal successors, (1427), 23 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:27,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:27,908 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:27,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:28,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:28,109 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:57:28,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash -899785140, now seen corresponding path program 19 times [2023-11-19 07:57:28,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:28,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44755850] [2023-11-19 07:57:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:28,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:28,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:28,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44755850] [2023-11-19 07:57:28,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44755850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:28,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792030374] [2023-11-19 07:57:28,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:57:28,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:28,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:28,330 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:28,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dfb7db1-55a9-4aa5-b688-5d7972cadbd7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 07:57:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:28,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:57:28,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:28,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792030374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:28,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-19 07:57:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488152329] [2023-11-19 07:57:28,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:28,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:57:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:57:28,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:57:28,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-11-19 07:57:28,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 941 transitions, 25204 flow. Second operand has 24 states, 24 states have (on average 62.041666666666664) internal successors, (1489), 24 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:28,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:28,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-11-19 07:57:28,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand