./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok.i --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_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/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_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/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_bbcd743c-af16-4412-a75f-94d9ff862c08/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 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:59:44,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:44,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:59:44,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:44,869 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:44,906 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:44,907 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:44,908 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:44,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:44,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:44,915 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:44,916 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:44,916 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:44,918 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:44,918 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:59:44,919 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:44,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:44,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:44,920 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:44,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:59:44,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:44,922 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:59:44,922 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:44,922 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:59:44,923 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:44,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:44,924 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:44,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:44,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:44,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:44,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:44,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:59:44,927 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:44,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:44,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:44,927 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:59:44,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:44,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:44,928 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:44,928 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_bbcd743c-af16-4412-a75f-94d9ff862c08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 [2023-11-19 07:59:45,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:45,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:45,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:45,308 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:45,309 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:45,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/queue_ok.i [2023-11-19 07:59:48,441 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:48,740 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:48,745 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/sv-benchmarks/c/pthread/queue_ok.i [2023-11-19 07:59:48,767 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/data/0df111913/f9f5c24d5e2f4d3eb54c9667e64d6b7f/FLAG800a07af2 [2023-11-19 07:59:48,782 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/data/0df111913/f9f5c24d5e2f4d3eb54c9667e64d6b7f [2023-11-19 07:59:48,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:48,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:48,789 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:48,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:48,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:48,796 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:48" (1/1) ... [2023-11-19 07:59:48,797 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655bf04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48, skipping insertion in model container [2023-11-19 07:59:48,797 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:48" (1/1) ... [2023-11-19 07:59:48,862 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:49,459 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_bbcd743c-af16-4412-a75f-94d9ff862c08/sv-benchmarks/c/pthread/queue_ok.i[43266,43279] [2023-11-19 07:59:49,470 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_bbcd743c-af16-4412-a75f-94d9ff862c08/sv-benchmarks/c/pthread/queue_ok.i[43543,43556] [2023-11-19 07:59:49,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:49,497 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:49,590 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_bbcd743c-af16-4412-a75f-94d9ff862c08/sv-benchmarks/c/pthread/queue_ok.i[43266,43279] [2023-11-19 07:59:49,598 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_bbcd743c-af16-4412-a75f-94d9ff862c08/sv-benchmarks/c/pthread/queue_ok.i[43543,43556] [2023-11-19 07:59:49,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:49,714 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:49,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49 WrapperNode [2023-11-19 07:59:49,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:49,717 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:49,717 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:49,717 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:49,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,763 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,821 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2023-11-19 07:59:49,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:49,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:49,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:49,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:49,835 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,858 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,868 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,891 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,904 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:49,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:49,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:49,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:49,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (1/1) ... [2023-11-19 07:59:49,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:49,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:49,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:49,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:59:49,996 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:59:49,996 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:59:49,996 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:59:49,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:59:49,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:59:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:59:49,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:59:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:59:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:49,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:50,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:50,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:50,002 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 07:59:50,189 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:50,192 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:50,629 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:50,643 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:50,644 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:59:50,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:50 BoogieIcfgContainer [2023-11-19 07:59:50,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:50,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:50,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:50,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:50,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:48" (1/3) ... [2023-11-19 07:59:50,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0864d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:50, skipping insertion in model container [2023-11-19 07:59:50,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:49" (2/3) ... [2023-11-19 07:59:50,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0864d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:50, skipping insertion in model container [2023-11-19 07:59:50,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:50" (3/3) ... [2023-11-19 07:59:50,660 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok.i [2023-11-19 07:59:50,669 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:59:50,678 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:50,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:59:50,679 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:59:50,841 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:59:50,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 226 transitions, 466 flow [2023-11-19 07:59:51,089 INFO L124 PetriNetUnfolderBase]: 13/224 cut-off events. [2023-11-19 07:59:51,089 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:59:51,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 224 events. 13/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 372 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 147. Up to 3 conditions per place. [2023-11-19 07:59:51,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 226 transitions, 466 flow [2023-11-19 07:59:51,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 214 transitions, 437 flow [2023-11-19 07:59:51,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:59:51,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 214 transitions, 437 flow [2023-11-19 07:59:51,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 214 transitions, 437 flow [2023-11-19 07:59:51,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 214 transitions, 437 flow [2023-11-19 07:59:51,204 INFO L124 PetriNetUnfolderBase]: 13/214 cut-off events. [2023-11-19 07:59:51,204 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:59:51,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 214 events. 13/214 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 304 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 147. Up to 3 conditions per place. [2023-11-19 07:59:51,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 10812 [2023-11-19 07:59:58,679 INFO L134 LiptonReduction]: Checked pairs total: 20702 [2023-11-19 07:59:58,679 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-11-19 07:59:58,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:58,717 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;@2c94ea34, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:58,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:59:58,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:59:58,719 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:59:58,720 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:58,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:58,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:59:58,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:59:58,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash 881, now seen corresponding path program 1 times [2023-11-19 07:59:58,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:58,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876063881] [2023-11-19 07:59:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:58,895 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 07:59:58,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876063881] [2023-11-19 07:59:58,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876063881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:58,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:58,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:59:58,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654589928] [2023-11-19 07:59:58,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:58,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 428 [2023-11-19 07:59:58,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 103 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 07:59:58,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:58,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 428 [2023-11-19 07:59:58,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:59,280 INFO L124 PetriNetUnfolderBase]: 902/1492 cut-off events. [2023-11-19 07:59:59,281 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-19 07:59:59,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 1492 events. 902/1492 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6530 event pairs, 717 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 2805. Up to 1425 conditions per place. [2023-11-19 07:59:59,298 INFO L140 encePairwiseOnDemand]: 427/428 looper letters, 41 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-11-19 07:59:59,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 183 flow [2023-11-19 07:59:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:59:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:59:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 472 transitions. [2023-11-19 07:59:59,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514018691588785 [2023-11-19 07:59:59,334 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 472 transitions. [2023-11-19 07:59:59,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 472 transitions. [2023-11-19 07:59:59,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:59,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 472 transitions. [2023-11-19 07:59:59,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 07:59:59,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states 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 07:59:59,356 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states 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 07:59:59,358 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 103 flow. Second operand 2 states and 472 transitions. [2023-11-19 07:59:59,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 183 flow [2023-11-19 07:59:59,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:59:59,365 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 96 flow [2023-11-19 07:59:59,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-11-19 07:59:59,370 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-19 07:59:59,370 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 96 flow [2023-11-19 07:59:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 07:59:59,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:59,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:59:59,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:59:59,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash 832002985, now seen corresponding path program 1 times [2023-11-19 07:59:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:59,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035899780] [2023-11-19 07:59:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:59,723 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 07:59:59,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:59,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035899780] [2023-11-19 07:59:59,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035899780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:59,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:59,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:59,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339665829] [2023-11-19 07:59:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:59,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:59,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:59,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 07:59:59,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 07:59:59,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:59,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 07:59:59,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:59,936 INFO L124 PetriNetUnfolderBase]: 319/612 cut-off events. [2023-11-19 07:59:59,936 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:59:59,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 612 events. 319/612 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2681 event pairs, 223 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 1223. Up to 368 conditions per place. [2023-11-19 07:59:59,941 INFO L140 encePairwiseOnDemand]: 424/428 looper letters, 40 selfloop transitions, 2 changer transitions 11/55 dead transitions. [2023-11-19 07:59:59,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 219 flow [2023-11-19 07:59:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-11-19 07:59:59,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311526479750779 [2023-11-19 07:59:59,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-11-19 07:59:59,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-11-19 07:59:59,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:59,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-11-19 07:59:59,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states 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 07:59:59,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states 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 07:59:59,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states 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 07:59:59,955 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 96 flow. Second operand 3 states and 682 transitions. [2023-11-19 07:59:59,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 219 flow [2023-11-19 07:59:59,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:59:59,957 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 92 flow [2023-11-19 07:59:59,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-11-19 07:59:59,958 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-11-19 07:59:59,959 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 92 flow [2023-11-19 07:59:59,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states 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 07:59:59,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:59,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:59,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:59:59,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:59:59,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash -168236240, now seen corresponding path program 1 times [2023-11-19 07:59:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:59,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097552344] [2023-11-19 07:59:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:00,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097552344] [2023-11-19 08:00:00,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097552344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:00,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:00,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:00,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373500164] [2023-11-19 08:00:00,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:00,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:00,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:00,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:00,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:00,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 428 [2023-11-19 08:00:00,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:00,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 428 [2023-11-19 08:00:00,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:00,208 INFO L124 PetriNetUnfolderBase]: 243/476 cut-off events. [2023-11-19 08:00:00,208 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 08:00:00,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 476 events. 243/476 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1635 event pairs, 147 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 1002. Up to 339 conditions per place. [2023-11-19 08:00:00,211 INFO L140 encePairwiseOnDemand]: 424/428 looper letters, 49 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-11-19 08:00:00,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 228 flow [2023-11-19 08:00:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-11-19 08:00:00,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342679127725857 [2023-11-19 08:00:00,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-11-19 08:00:00,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-11-19 08:00:00,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:00,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-11-19 08:00:00,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,224 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 92 flow. Second operand 3 states and 686 transitions. [2023-11-19 08:00:00,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 228 flow [2023-11-19 08:00:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:00,227 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 107 flow [2023-11-19 08:00:00,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-19 08:00:00,228 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-19 08:00:00,228 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 107 flow [2023-11-19 08:00:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:00,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:00,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:00:00,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:00,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1851483565, now seen corresponding path program 1 times [2023-11-19 08:00:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:00,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569307657] [2023-11-19 08:00:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:00,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569307657] [2023-11-19 08:00:00,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569307657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:00,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:00,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:00,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475549665] [2023-11-19 08:00:00,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:00,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:00,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:00,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:00,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 428 [2023-11-19 08:00:00,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:00,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 428 [2023-11-19 08:00:00,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:00,549 INFO L124 PetriNetUnfolderBase]: 175/362 cut-off events. [2023-11-19 08:00:00,549 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:00:00,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 362 events. 175/362 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1089 event pairs, 6 based on Foata normal form. 46/382 useless extension candidates. Maximal degree in co-relation 807. Up to 331 conditions per place. [2023-11-19 08:00:00,552 INFO L140 encePairwiseOnDemand]: 425/428 looper letters, 43 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-19 08:00:00,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 214 flow [2023-11-19 08:00:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-11-19 08:00:00,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241433021806854 [2023-11-19 08:00:00,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-11-19 08:00:00,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-11-19 08:00:00,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:00,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-11-19 08:00:00,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,564 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 107 flow. Second operand 3 states and 673 transitions. [2023-11-19 08:00:00,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 214 flow [2023-11-19 08:00:00,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 48 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:00,568 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 110 flow [2023-11-19 08:00:00,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-19 08:00:00,570 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-19 08:00:00,570 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 110 flow [2023-11-19 08:00:00,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:00,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:00,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:00:00,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:00,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash 573764111, now seen corresponding path program 1 times [2023-11-19 08:00:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:00,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14029482] [2023-11-19 08:00:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:00,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14029482] [2023-11-19 08:00:00,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14029482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886560968] [2023-11-19 08:00:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:00,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:00,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:00,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:00:00,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886560968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:00,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:00,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 08:00:00,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540356230] [2023-11-19 08:00:00,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:00,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:00:00,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:00:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:00:00,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 08:00:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 215.85714285714286) internal successors, (1511), 7 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:01,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 08:00:01,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:01,240 INFO L124 PetriNetUnfolderBase]: 243/514 cut-off events. [2023-11-19 08:00:01,241 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 08:00:01,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 514 events. 243/514 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1368 event pairs, 85 based on Foata normal form. 12/492 useless extension candidates. Maximal degree in co-relation 1171. Up to 205 conditions per place. [2023-11-19 08:00:01,244 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 73 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2023-11-19 08:00:01,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 86 transitions, 380 flow [2023-11-19 08:00:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:00:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:00:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1346 transitions. [2023-11-19 08:00:01,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241433021806854 [2023-11-19 08:00:01,250 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1346 transitions. [2023-11-19 08:00:01,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1346 transitions. [2023-11-19 08:00:01,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:01,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1346 transitions. [2023-11-19 08:00:01,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.33333333333334) internal successors, (1346), 6 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 428.0) internal successors, (2996), 7 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,295 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 110 flow. Second operand 6 states and 1346 transitions. [2023-11-19 08:00:01,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 86 transitions, 380 flow [2023-11-19 08:00:01,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 86 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:01,298 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 170 flow [2023-11-19 08:00:01,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-19 08:00:01,299 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 6 predicate places. [2023-11-19 08:00:01,299 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 170 flow [2023-11-19 08:00:01,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.85714285714286) internal successors, (1511), 7 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:01,301 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:01,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:01,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:01,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:01,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1585663574, now seen corresponding path program 2 times [2023-11-19 08:00:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925381419] [2023-11-19 08:00:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:01,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:01,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925381419] [2023-11-19 08:00:01,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925381419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:01,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750298141] [2023-11-19 08:00:01,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:01,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:01,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:01,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:01,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:02,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:02,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:00:02,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:02,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:02,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750298141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:02,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:02,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 08:00:02,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079511817] [2023-11-19 08:00:02,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:02,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:00:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:00:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:00:02,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 08:00:02,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 170 flow. Second operand has 13 states, 13 states have (on average 216.46153846153845) internal successors, (2814), 13 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:02,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 08:00:02,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:02,855 INFO L124 PetriNetUnfolderBase]: 447/958 cut-off events. [2023-11-19 08:00:02,855 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-11-19 08:00:02,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 958 events. 447/958 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2553 event pairs, 85 based on Foata normal form. 24/924 useless extension candidates. Maximal degree in co-relation 2459. Up to 205 conditions per place. [2023-11-19 08:00:02,864 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 145 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2023-11-19 08:00:02,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 170 transitions, 872 flow [2023-11-19 08:00:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:00:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:00:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2693 transitions. [2023-11-19 08:00:02,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243380062305296 [2023-11-19 08:00:02,875 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2693 transitions. [2023-11-19 08:00:02,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2693 transitions. [2023-11-19 08:00:02,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:02,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2693 transitions. [2023-11-19 08:00:02,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 224.41666666666666) internal successors, (2693), 12 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 428.0) internal successors, (5564), 13 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,901 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 428.0) internal successors, (5564), 13 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,902 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 170 flow. Second operand 12 states and 2693 transitions. [2023-11-19 08:00:02,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 170 transitions, 872 flow [2023-11-19 08:00:02,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 170 transitions, 833 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:02,910 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 320 flow [2023-11-19 08:00:02,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-11-19 08:00:02,912 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2023-11-19 08:00:02,912 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 320 flow [2023-11-19 08:00:02,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 216.46153846153845) internal successors, (2814), 13 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:02,914 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:02,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:03,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:03,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:03,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2005191414, now seen corresponding path program 3 times [2023-11-19 08:00:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:03,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119784707] [2023-11-19 08:00:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:03,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:03,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:03,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119784707] [2023-11-19 08:00:03,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119784707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:03,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426340871] [2023-11-19 08:00:03,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:03,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:03,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:03,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:04,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 08:00:04,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:04,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-19 08:00:04,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:05,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 08:00:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:00:05,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 08:00:05,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 08:00:05,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 08:00:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-19 08:00:05,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426340871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:05,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:05,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2023-11-19 08:00:05,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128298372] [2023-11-19 08:00:05,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:05,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:00:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:00:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:00:05,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 428 [2023-11-19 08:00:05,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:05,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 428 [2023-11-19 08:00:05,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:06,129 INFO L124 PetriNetUnfolderBase]: 713/1570 cut-off events. [2023-11-19 08:00:06,129 INFO L125 PetriNetUnfolderBase]: For 975/975 co-relation queries the response was YES. [2023-11-19 08:00:06,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 1570 events. 713/1570 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5465 event pairs, 108 based on Foata normal form. 0/1506 useless extension candidates. Maximal degree in co-relation 4199. Up to 654 conditions per place. [2023-11-19 08:00:06,146 INFO L140 encePairwiseOnDemand]: 419/428 looper letters, 76 selfloop transitions, 24 changer transitions 0/103 dead transitions. [2023-11-19 08:00:06,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 727 flow [2023-11-19 08:00:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:00:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:00:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1456 transitions. [2023-11-19 08:00:06,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48598130841121495 [2023-11-19 08:00:06,154 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1456 transitions. [2023-11-19 08:00:06,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1456 transitions. [2023-11-19 08:00:06,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:06,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1456 transitions. [2023-11-19 08:00:06,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.0) internal successors, (1456), 7 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:06,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 428.0) internal successors, (3424), 8 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:06,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 428.0) internal successors, (3424), 8 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:06,172 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 320 flow. Second operand 7 states and 1456 transitions. [2023-11-19 08:00:06,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 727 flow [2023-11-19 08:00:06,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 711 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:00:06,184 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 419 flow [2023-11-19 08:00:06,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-11-19 08:00:06,186 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 29 predicate places. [2023-11-19 08:00:06,186 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 419 flow [2023-11-19 08:00:06,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:06,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:06,188 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:06,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:06,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:06,406 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:06,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:06,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1554741326, now seen corresponding path program 1 times [2023-11-19 08:00:06,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:06,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794104010] [2023-11-19 08:00:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:06,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:06,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794104010] [2023-11-19 08:00:06,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794104010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916286447] [2023-11-19 08:00:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:06,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:06,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:06,988 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:06,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:07,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:00:07,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:07,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:07,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916286447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:07,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:07,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-11-19 08:00:07,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765457628] [2023-11-19 08:00:07,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:07,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 08:00:07,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:07,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 08:00:07,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-19 08:00:07,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 428 [2023-11-19 08:00:07,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 419 flow. Second operand has 23 states, 23 states have (on average 217.3913043478261) internal successors, (5000), 23 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:07,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:07,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 428 [2023-11-19 08:00:07,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:09,381 INFO L124 PetriNetUnfolderBase]: 1283/2850 cut-off events. [2023-11-19 08:00:09,381 INFO L125 PetriNetUnfolderBase]: For 4516/4516 co-relation queries the response was YES. [2023-11-19 08:00:09,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9338 conditions, 2850 events. 1283/2850 cut-off events. For 4516/4516 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9976 event pairs, 125 based on Foata normal form. 80/2906 useless extension candidates. Maximal degree in co-relation 9317. Up to 434 conditions per place. [2023-11-19 08:00:09,414 INFO L140 encePairwiseOnDemand]: 423/428 looper letters, 402 selfloop transitions, 43 changer transitions 0/448 dead transitions. [2023-11-19 08:00:09,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 448 transitions, 3162 flow [2023-11-19 08:00:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 08:00:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 08:00:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4937 transitions. [2023-11-19 08:00:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243203058623619 [2023-11-19 08:00:09,437 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4937 transitions. [2023-11-19 08:00:09,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4937 transitions. [2023-11-19 08:00:09,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:09,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4937 transitions. [2023-11-19 08:00:09,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 224.4090909090909) internal successors, (4937), 22 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 428.0) internal successors, (9844), 23 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,486 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 428.0) internal successors, (9844), 23 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,486 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 419 flow. Second operand 22 states and 4937 transitions. [2023-11-19 08:00:09,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 448 transitions, 3162 flow [2023-11-19 08:00:09,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 448 transitions, 3161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:09,514 INFO L231 Difference]: Finished difference. Result has 107 places, 92 transitions, 821 flow [2023-11-19 08:00:09,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=821, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2023-11-19 08:00:09,515 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 60 predicate places. [2023-11-19 08:00:09,515 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 821 flow [2023-11-19 08:00:09,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 217.3913043478261) internal successors, (5000), 23 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:09,518 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 11, 11, 11, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:09,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:09,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:00:09,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:09,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -995313193, now seen corresponding path program 2 times [2023-11-19 08:00:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585511236] [2023-11-19 08:00:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2023-11-19 08:00:12,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:12,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585511236] [2023-11-19 08:00:12,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585511236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:12,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:12,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:00:12,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821134839] [2023-11-19 08:00:12,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:12,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:00:12,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:12,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:00:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:00:12,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 428 [2023-11-19 08:00:12,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 821 flow. Second operand has 5 states, 5 states have (on average 205.6) internal successors, (1028), 5 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:12,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 428 [2023-11-19 08:00:12,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:13,501 INFO L124 PetriNetUnfolderBase]: 1351/3026 cut-off events. [2023-11-19 08:00:13,502 INFO L125 PetriNetUnfolderBase]: For 4712/4712 co-relation queries the response was YES. [2023-11-19 08:00:13,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10314 conditions, 3026 events. 1351/3026 cut-off events. For 4712/4712 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11140 event pairs, 629 based on Foata normal form. 1/3003 useless extension candidates. Maximal degree in co-relation 10283. Up to 2525 conditions per place. [2023-11-19 08:00:13,531 INFO L140 encePairwiseOnDemand]: 421/428 looper letters, 94 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2023-11-19 08:00:13,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 107 transitions, 1088 flow [2023-11-19 08:00:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1047 transitions. [2023-11-19 08:00:13,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892523364485981 [2023-11-19 08:00:13,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1047 transitions. [2023-11-19 08:00:13,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1047 transitions. [2023-11-19 08:00:13,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:13,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1047 transitions. [2023-11-19 08:00:13,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:13,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 428.0) internal successors, (2568), 6 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:13,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 428.0) internal successors, (2568), 6 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:13,545 INFO L175 Difference]: Start difference. First operand has 107 places, 92 transitions, 821 flow. Second operand 5 states and 1047 transitions. [2023-11-19 08:00:13,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 107 transitions, 1088 flow [2023-11-19 08:00:13,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 1052 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-11-19 08:00:13,583 INFO L231 Difference]: Finished difference. Result has 106 places, 100 transitions, 875 flow [2023-11-19 08:00:13,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=875, PETRI_PLACES=106, PETRI_TRANSITIONS=100} [2023-11-19 08:00:13,585 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 59 predicate places. [2023-11-19 08:00:13,585 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 100 transitions, 875 flow [2023-11-19 08:00:13,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.6) internal successors, (1028), 5 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:13,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:13,586 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:13,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:00:13,587 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:13,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1126297666, now seen corresponding path program 3 times [2023-11-19 08:00:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:13,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092504623] [2023-11-19 08:00:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:13,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 1099 trivial. 0 not checked. [2023-11-19 08:00:16,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:16,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092504623] [2023-11-19 08:00:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092504623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:16,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:16,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:00:16,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120418305] [2023-11-19 08:00:16,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:00:16,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:00:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:00:16,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 428 [2023-11-19 08:00:16,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 100 transitions, 875 flow. Second operand has 6 states, 6 states have (on average 200.5) internal successors, (1203), 6 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:16,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:16,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 428 [2023-11-19 08:00:16,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:17,565 INFO L124 PetriNetUnfolderBase]: 1359/3046 cut-off events. [2023-11-19 08:00:17,565 INFO L125 PetriNetUnfolderBase]: For 5742/5742 co-relation queries the response was YES. [2023-11-19 08:00:17,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11505 conditions, 3046 events. 1359/3046 cut-off events. For 5742/5742 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11232 event pairs, 79 based on Foata normal form. 3/3025 useless extension candidates. Maximal degree in co-relation 11470. Up to 2501 conditions per place. [2023-11-19 08:00:17,602 INFO L140 encePairwiseOnDemand]: 421/428 looper letters, 98 selfloop transitions, 12 changer transitions 1/114 dead transitions. [2023-11-19 08:00:17,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 1150 flow [2023-11-19 08:00:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:00:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:00:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1031 transitions. [2023-11-19 08:00:17,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48177570093457944 [2023-11-19 08:00:17,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1031 transitions. [2023-11-19 08:00:17,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1031 transitions. [2023-11-19 08:00:17,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:17,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1031 transitions. [2023-11-19 08:00:17,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 428.0) internal successors, (2568), 6 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,616 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 428.0) internal successors, (2568), 6 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,616 INFO L175 Difference]: Start difference. First operand has 106 places, 100 transitions, 875 flow. Second operand 5 states and 1031 transitions. [2023-11-19 08:00:17,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 1150 flow [2023-11-19 08:00:17,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 114 transitions, 1144 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:17,656 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 946 flow [2023-11-19 08:00:17,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=946, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2023-11-19 08:00:17,658 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 66 predicate places. [2023-11-19 08:00:17,658 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 946 flow [2023-11-19 08:00:17,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.5) internal successors, (1203), 6 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:17,659 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:17,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:00:17,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:00:17,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1812278218, now seen corresponding path program 4 times [2023-11-19 08:00:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873962858] [2023-11-19 08:00:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 309 proven. 105 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2023-11-19 08:00:22,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:22,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873962858] [2023-11-19 08:00:22,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873962858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:22,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928959963] [2023-11-19 08:00:22,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:22,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:22,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:22,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbcd743c-af16-4412-a75f-94d9ff862c08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:32,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:32,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:32,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-19 08:00:32,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:32,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 08:00:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:00:32,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 08:00:32,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 08:00:32,949 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-19 08:00:32,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 16 [2023-11-19 08:00:33,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-19 08:00:33,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-11-19 08:00:33,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:00:33,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 08:00:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 08:00:33,192 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-19 08:00:33,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 16 [2023-11-19 08:00:33,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-19 08:00:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 723 proven. 55 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-19 08:00:33,241 INFO L327 TraceCheckSpWp]: Computing backward predicates...