./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.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_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/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_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/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_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:48,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:48,336 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:48,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:48,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:48,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:48,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:48,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:48,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:48,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:48,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:48,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:48,394 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:48,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:48,396 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:48,397 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:48,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:48,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:48,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:48,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:48,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:48,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:48,400 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:48,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:48,401 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:48,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:48,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:48,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:48,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:48,403 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:48,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:48,405 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:48,405 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:48,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:48,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:48,406 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:48,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:48,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:48,407 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:48,407 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_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2023-11-19 08:01:48,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:48,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:48,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:48,733 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:48,734 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:48,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-19 08:01:51,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:52,251 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:52,252 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-19 08:01:52,270 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/data/89b1210a0/674cfb0230284b18819f2ed6ad187357/FLAG3163813b7 [2023-11-19 08:01:52,286 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/data/89b1210a0/674cfb0230284b18819f2ed6ad187357 [2023-11-19 08:01:52,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:52,290 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:52,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:52,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:52,298 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:52,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:52" (1/1) ... [2023-11-19 08:01:52,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4629b617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:52, skipping insertion in model container [2023-11-19 08:01:52,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:52" (1/1) ... [2023-11-19 08:01:52,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:52,924 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_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-11-19 08:01:52,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:52,995 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:53,033 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_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-11-19 08:01:53,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:53,115 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:53,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53 WrapperNode [2023-11-19 08:01:53,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:53,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:53,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:53,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:53,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,149 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,189 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 252 [2023-11-19 08:01:53,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:53,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:53,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:53,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:53,201 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,239 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,242 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,244 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:53,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:53,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:53,251 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:53,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (1/1) ... [2023-11-19 08:01:53,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:53,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:53,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:01:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:01:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 08:01:53,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 08:01:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:53,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:53,407 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:01:53,670 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:53,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:54,099 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:54,111 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:54,112 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-19 08:01:54,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:54 BoogieIcfgContainer [2023-11-19 08:01:54,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:54,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:54,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:54,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:54,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:52" (1/3) ... [2023-11-19 08:01:54,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ed949a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:54, skipping insertion in model container [2023-11-19 08:01:54,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:53" (2/3) ... [2023-11-19 08:01:54,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ed949a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:54, skipping insertion in model container [2023-11-19 08:01:54,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:54" (3/3) ... [2023-11-19 08:01:54,127 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-11-19 08:01:54,136 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:01:54,144 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:54,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-19 08:01:54,144 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:01:54,235 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 08:01:54,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 257 transitions, 521 flow [2023-11-19 08:01:54,411 INFO L124 PetriNetUnfolderBase]: 73/400 cut-off events. [2023-11-19 08:01:54,411 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:54,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 400 events. 73/400 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1832 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2023-11-19 08:01:54,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 257 transitions, 521 flow [2023-11-19 08:01:54,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 252 transitions, 508 flow [2023-11-19 08:01:54,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:54,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 252 transitions, 508 flow [2023-11-19 08:01:54,481 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 252 transitions, 508 flow [2023-11-19 08:01:54,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 252 transitions, 508 flow [2023-11-19 08:01:54,599 INFO L124 PetriNetUnfolderBase]: 72/395 cut-off events. [2023-11-19 08:01:54,599 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:54,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 395 events. 72/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1795 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2023-11-19 08:01:54,622 INFO L119 LiptonReduction]: Number of co-enabled transitions 21456 [2023-11-19 08:01:58,345 INFO L134 LiptonReduction]: Checked pairs total: 30710 [2023-11-19 08:01:58,351 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-19 08:01:58,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:58,383 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;@4ff33a19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:58,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 08:01:58,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:58,391 INFO L124 PetriNetUnfolderBase]: 12/39 cut-off events. [2023-11-19 08:01:58,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:58,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:58,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:58,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:01:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1072479972, now seen corresponding path program 1 times [2023-11-19 08:01:58,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:58,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444240954] [2023-11-19 08:01:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:58,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444240954] [2023-11-19 08:01:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444240954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:58,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:58,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161142042] [2023-11-19 08:01:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:58,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:58,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 455 [2023-11-19 08:01:58,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 97 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:58,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:58,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 455 [2023-11-19 08:01:58,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:59,130 INFO L124 PetriNetUnfolderBase]: 631/1296 cut-off events. [2023-11-19 08:01:59,130 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:59,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2460 conditions, 1296 events. 631/1296 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7084 event pairs, 512 based on Foata normal form. 172/1245 useless extension candidates. Maximal degree in co-relation 2373. Up to 1159 conditions per place. [2023-11-19 08:01:59,141 INFO L140 encePairwiseOnDemand]: 420/455 looper letters, 53 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 08:01:59,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 246 flow [2023-11-19 08:01:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2023-11-19 08:01:59,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216117216117216 [2023-11-19 08:01:59,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2023-11-19 08:01:59,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2023-11-19 08:01:59,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:59,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2023-11-19 08:01:59,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 455.0) internal successors, (1820), 4 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,201 INFO L175 Difference]: Start difference. First operand has 63 places, 97 transitions, 198 flow. Second operand 3 states and 712 transitions. [2023-11-19 08:01:59,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 246 flow [2023-11-19 08:01:59,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:59,210 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 146 flow [2023-11-19 08:01:59,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-19 08:01:59,218 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-11-19 08:01:59,219 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 146 flow [2023-11-19 08:01:59,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:59,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:59,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:59,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:01:59,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1012587014, now seen corresponding path program 1 times [2023-11-19 08:01:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211700423] [2023-11-19 08:01:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:01:59,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:59,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211700423] [2023-11-19 08:01:59,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211700423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:01:59,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767758852] [2023-11-19 08:01:59,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:59,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:59,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:01:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:59,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:01:59,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:01:59,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:01:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767758852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:59,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:01:59,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-19 08:01:59,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607988257] [2023-11-19 08:01:59,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:59,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:59,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 455 [2023-11-19 08:01:59,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:59,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 455 [2023-11-19 08:01:59,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:59,904 INFO L124 PetriNetUnfolderBase]: 631/1299 cut-off events. [2023-11-19 08:01:59,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:59,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1299 events. 631/1299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7099 event pairs, 512 based on Foata normal form. 0/1076 useless extension candidates. Maximal degree in co-relation 2464. Up to 1159 conditions per place. [2023-11-19 08:01:59,914 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-19 08:01:59,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 274 flow [2023-11-19 08:01:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:01:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1303 transitions. [2023-11-19 08:01:59,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772893772893773 [2023-11-19 08:01:59,921 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1303 transitions. [2023-11-19 08:01:59,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1303 transitions. [2023-11-19 08:01:59,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:59,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1303 transitions. [2023-11-19 08:01:59,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 455.0) internal successors, (3185), 7 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,938 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 146 flow. Second operand 6 states and 1303 transitions. [2023-11-19 08:01:59,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 274 flow [2023-11-19 08:01:59,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 270 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:01:59,942 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 178 flow [2023-11-19 08:01:59,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-11-19 08:01:59,943 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-11-19 08:01:59,944 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 178 flow [2023-11-19 08:01:59,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:59,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:59,945 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-19 08:01:59,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:00,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:00,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:02:00,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:00,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1489452960, now seen corresponding path program 2 times [2023-11-19 08:02:00,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:00,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057047666] [2023-11-19 08:02:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:00,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:02:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057047666] [2023-11-19 08:02:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057047666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681878682] [2023-11-19 08:02:00,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:00,354 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:00,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:02:00,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:02:00,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:00,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:02:00,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:02:00,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:02:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681878682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:00,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-19 08:02:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129802679] [2023-11-19 08:02:00,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:00,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:02:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:02:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:02:00,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 455 [2023-11-19 08:02:00,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 178 flow. Second operand has 12 states, 12 states have (on average 208.25) internal successors, (2499), 12 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states 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 08:02:00,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:00,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 455 [2023-11-19 08:02:00,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:01,020 INFO L124 PetriNetUnfolderBase]: 631/1305 cut-off events. [2023-11-19 08:02:01,020 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 08:02:01,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1305 events. 631/1305 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7102 event pairs, 512 based on Foata normal form. 6/1089 useless extension candidates. Maximal degree in co-relation 2455. Up to 1159 conditions per place. [2023-11-19 08:02:01,031 INFO L140 encePairwiseOnDemand]: 452/455 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-11-19 08:02:01,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 342 flow [2023-11-19 08:02:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:02:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:02:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2554 transitions. [2023-11-19 08:02:01,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46776556776556777 [2023-11-19 08:02:01,042 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2554 transitions. [2023-11-19 08:02:01,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2554 transitions. [2023-11-19 08:02:01,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:01,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2554 transitions. [2023-11-19 08:02:01,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.83333333333334) internal successors, (2554), 12 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states 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 08:02:01,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states 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 08:02:01,075 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 455.0) internal successors, (5915), 13 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states 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 08:02:01,075 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 178 flow. Second operand 12 states and 2554 transitions. [2023-11-19 08:02:01,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 342 flow [2023-11-19 08:02:01,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 328 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:01,081 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 248 flow [2023-11-19 08:02:01,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=455, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2023-11-19 08:02:01,083 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-11-19 08:02:01,084 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 248 flow [2023-11-19 08:02:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 208.25) internal successors, (2499), 12 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states 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 08:02:01,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:01,087 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-19 08:02:01,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:01,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 08:02:01,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 08:02:01,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1597783712, now seen corresponding path program 3 times [2023-11-19 08:02:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:01,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340524906] [2023-11-19 08:02:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:01,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:02:01,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:02:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:02:01,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:02:01,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:02:01,407 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 08:02:01,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 08:02:01,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 08:02:01,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 08:02:01,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 08:02:01,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:02:01,411 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-19 08:02:01,415 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:02:01,415 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:02:01,501 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:02:01,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 331 transitions, 678 flow [2023-11-19 08:02:01,612 INFO L124 PetriNetUnfolderBase]: 118/643 cut-off events. [2023-11-19 08:02:01,613 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:02:01,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 643 events. 118/643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3346 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 402. Up to 12 conditions per place. [2023-11-19 08:02:01,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 331 transitions, 678 flow [2023-11-19 08:02:01,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 331 transitions, 678 flow [2023-11-19 08:02:01,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:02:01,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 331 transitions, 678 flow [2023-11-19 08:02:01,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 331 transitions, 678 flow [2023-11-19 08:02:01,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 331 transitions, 678 flow [2023-11-19 08:02:01,742 INFO L124 PetriNetUnfolderBase]: 118/643 cut-off events. [2023-11-19 08:02:01,742 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:02:01,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 643 events. 118/643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3346 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 402. Up to 12 conditions per place. [2023-11-19 08:02:01,783 INFO L119 LiptonReduction]: Number of co-enabled transitions 54864 [2023-11-19 08:02:06,125 INFO L134 LiptonReduction]: Checked pairs total: 82244 [2023-11-19 08:02:06,126 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-19 08:02:06,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:06,129 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;@4ff33a19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:06,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 08:02:06,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:02:06,134 INFO L124 PetriNetUnfolderBase]: 10/41 cut-off events. [2023-11-19 08:02:06,134 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:02:06,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:06,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:06,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 08:02:06,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash -135104241, now seen corresponding path program 1 times [2023-11-19 08:02:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:06,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965909856] [2023-11-19 08:02:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:06,177 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 08:02:06,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:06,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965909856] [2023-11-19 08:02:06,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965909856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:06,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:06,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:06,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32830656] [2023-11-19 08:02:06,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:06,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:06,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:06,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:06,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 590 [2023-11-19 08:02:06,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 133 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 08:02:06,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:06,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 590 [2023-11-19 08:02:06,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:09,876 INFO L124 PetriNetUnfolderBase]: 20523/31523 cut-off events. [2023-11-19 08:02:09,877 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-19 08:02:09,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60685 conditions, 31523 events. 20523/31523 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 217735 event pairs, 17692 based on Foata normal form. 5278/31061 useless extension candidates. Maximal degree in co-relation 20767. Up to 29073 conditions per place. [2023-11-19 08:02:10,088 INFO L140 encePairwiseOnDemand]: 546/590 looper letters, 74 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-19 08:02:10,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-11-19 08:02:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 919 transitions. [2023-11-19 08:02:10,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192090395480226 [2023-11-19 08:02:10,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 919 transitions. [2023-11-19 08:02:10,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 919 transitions. [2023-11-19 08:02:10,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:10,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 919 transitions. [2023-11-19 08:02:10,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states 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 08:02:10,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states 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 08:02:10,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states 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 08:02:10,102 INFO L175 Difference]: Start difference. First operand has 87 places, 133 transitions, 282 flow. Second operand 3 states and 919 transitions. [2023-11-19 08:02:10,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-11-19 08:02:10,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:02:10,107 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 212 flow [2023-11-19 08:02:10,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-11-19 08:02:10,109 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-11-19 08:02:10,109 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 212 flow [2023-11-19 08:02:10,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states 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 08:02:10,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:10,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:10,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:02:10,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 08:02:10,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash -782341076, now seen corresponding path program 1 times [2023-11-19 08:02:10,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:10,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494231570] [2023-11-19 08:02:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:10,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:10,151 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 08:02:10,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:10,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494231570] [2023-11-19 08:02:10,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494231570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:10,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301957535] [2023-11-19 08:02:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:10,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:10,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:10,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:02:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:10,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:02:10,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:02:10,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:10,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301957535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:10,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:02:10,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 08:02:10,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136637538] [2023-11-19 08:02:10,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:10,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:10,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:10,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:10,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:10,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 590 [2023-11-19 08:02:10,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 08:02:10,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:10,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 590 [2023-11-19 08:02:10,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:13,292 INFO L124 PetriNetUnfolderBase]: 20188/31066 cut-off events. [2023-11-19 08:02:13,292 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-19 08:02:13,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60205 conditions, 31066 events. 20188/31066 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 217750 event pairs, 8512 based on Foata normal form. 0/25355 useless extension candidates. Maximal degree in co-relation 60192. Up to 29025 conditions per place. [2023-11-19 08:02:13,523 INFO L140 encePairwiseOnDemand]: 587/590 looper letters, 92 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-11-19 08:02:13,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-11-19 08:02:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2023-11-19 08:02:13,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056497175141242 [2023-11-19 08:02:13,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2023-11-19 08:02:13,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2023-11-19 08:02:13,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:13,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2023-11-19 08:02:13,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states 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 08:02:13,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states 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 08:02:13,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states 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 08:02:13,540 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 212 flow. Second operand 3 states and 895 transitions. [2023-11-19 08:02:13,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-11-19 08:02:13,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:13,549 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 220 flow [2023-11-19 08:02:13,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-11-19 08:02:13,554 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-11-19 08:02:13,554 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 220 flow [2023-11-19 08:02:13,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 08:02:13,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:13,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:13,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:13,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:02:13,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 08:02:13,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1270546198, now seen corresponding path program 1 times [2023-11-19 08:02:13,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:13,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193338075] [2023-11-19 08:02:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:13,854 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 08:02:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193338075] [2023-11-19 08:02:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193338075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271035370] [2023-11-19 08:02:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:13,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:13,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:13,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:13,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:02:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:13,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:02:13,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:13,985 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 08:02:13,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:14,005 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 08:02:14,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271035370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:14,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:14,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 08:02:14,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750162346] [2023-11-19 08:02:14,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:14,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:02:14,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:14,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:02:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:02:14,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 590 [2023-11-19 08:02:14,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 268.14285714285717) internal successors, (1877), 7 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states 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 08:02:14,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:14,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 590 [2023-11-19 08:02:14,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:16,917 INFO L124 PetriNetUnfolderBase]: 20639/31398 cut-off events. [2023-11-19 08:02:16,917 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2023-11-19 08:02:16,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61135 conditions, 31398 events. 20639/31398 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 213862 event pairs, 17692 based on Foata normal form. 3/25875 useless extension candidates. Maximal degree in co-relation 61107. Up to 29043 conditions per place. [2023-11-19 08:02:17,114 INFO L140 encePairwiseOnDemand]: 587/590 looper letters, 75 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-11-19 08:02:17,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-11-19 08:02:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:02:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1678 transitions. [2023-11-19 08:02:17,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47401129943502823 [2023-11-19 08:02:17,128 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1678 transitions. [2023-11-19 08:02:17,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1678 transitions. [2023-11-19 08:02:17,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:17,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1678 transitions. [2023-11-19 08:02:17,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.6666666666667) internal successors, (1678), 6 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states 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 08:02:17,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states 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 08:02:17,147 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states 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 08:02:17,147 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 220 flow. Second operand 6 states and 1678 transitions. [2023-11-19 08:02:17,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-11-19 08:02:17,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:17,151 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 254 flow [2023-11-19 08:02:17,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-11-19 08:02:17,153 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-11-19 08:02:17,153 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 254 flow [2023-11-19 08:02:17,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 268.14285714285717) internal successors, (1877), 7 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states 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 08:02:17,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:17,155 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:17,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 08:02:17,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:02:17,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 08:02:17,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:17,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1062321178, now seen corresponding path program 2 times [2023-11-19 08:02:17,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:17,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828366962] [2023-11-19 08:02:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:17,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:17,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828366962] [2023-11-19 08:02:17,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828366962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:17,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458933102] [2023-11-19 08:02:17,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:02:17,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:17,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:17,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:02:17,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:02:17,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:02:17,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:02:17,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:17,845 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 7 treesize of output 6 [2023-11-19 08:02:17,899 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 08:02:17,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 08:02:17,927 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 15 treesize of output 10 [2023-11-19 08:02:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 08:02:17,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:17,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458933102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:17,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:02:17,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-19 08:02:17,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928716149] [2023-11-19 08:02:17,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:17,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:02:17,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:02:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:02:18,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 590 [2023-11-19 08:02:18,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 255.66666666666666) internal successors, (1534), 6 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states 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 08:02:18,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:18,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 590 [2023-11-19 08:02:18,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:21,736 INFO L124 PetriNetUnfolderBase]: 25160/39446 cut-off events. [2023-11-19 08:02:21,737 INFO L125 PetriNetUnfolderBase]: For 934/934 co-relation queries the response was YES. [2023-11-19 08:02:21,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76941 conditions, 39446 events. 25160/39446 cut-off events. For 934/934 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 292468 event pairs, 4271 based on Foata normal form. 0/32714 useless extension candidates. Maximal degree in co-relation 76905. Up to 28726 conditions per place. [2023-11-19 08:02:21,950 INFO L140 encePairwiseOnDemand]: 579/590 looper letters, 189 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2023-11-19 08:02:21,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 224 transitions, 953 flow [2023-11-19 08:02:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:02:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:02:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1728 transitions. [2023-11-19 08:02:21,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488135593220339 [2023-11-19 08:02:21,962 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1728 transitions. [2023-11-19 08:02:21,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1728 transitions. [2023-11-19 08:02:21,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:21,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1728 transitions. [2023-11-19 08:02:21,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states 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 08:02:21,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states 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 08:02:21,979 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states 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 08:02:21,979 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 254 flow. Second operand 6 states and 1728 transitions. [2023-11-19 08:02:21,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 224 transitions, 953 flow [2023-11-19 08:02:21,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 224 transitions, 939 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:21,987 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 349 flow [2023-11-19 08:02:21,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2023-11-19 08:02:21,990 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 19 predicate places. [2023-11-19 08:02:21,990 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 349 flow [2023-11-19 08:02:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.66666666666666) internal successors, (1534), 6 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states 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 08:02:21,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:21,992 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:22,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:22,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:22,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 08:02:22,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1035874814, now seen corresponding path program 1 times [2023-11-19 08:02:22,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:22,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670558899] [2023-11-19 08:02:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:22,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 08:02:22,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:22,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670558899] [2023-11-19 08:02:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670558899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:22,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807005371] [2023-11-19 08:02:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:22,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:22,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:22,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:02:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:22,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:02:22,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:02:22,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:02:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807005371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:22,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:02:22,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-19 08:02:22,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631964839] [2023-11-19 08:02:22,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:02:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:02:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:02:22,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 590 [2023-11-19 08:02:22,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 349 flow. Second operand has 14 states, 14 states have (on average 263.92857142857144) internal successors, (3695), 14 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states 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 08:02:22,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:22,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 590 [2023-11-19 08:02:22,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:26,854 INFO L124 PetriNetUnfolderBase]: 25222/39388 cut-off events. [2023-11-19 08:02:26,854 INFO L125 PetriNetUnfolderBase]: For 7584/7586 co-relation queries the response was YES. [2023-11-19 08:02:26,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84847 conditions, 39388 events. 25222/39388 cut-off events. For 7584/7586 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 294413 event pairs, 642 based on Foata normal form. 30/34792 useless extension candidates. Maximal degree in co-relation 84789. Up to 35697 conditions per place. [2023-11-19 08:02:27,020 INFO L140 encePairwiseOnDemand]: 585/590 looper letters, 147 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2023-11-19 08:02:27,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 875 flow [2023-11-19 08:02:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:02:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 08:02:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3812 transitions. [2023-11-19 08:02:27,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46150121065375305 [2023-11-19 08:02:27,037 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3812 transitions. [2023-11-19 08:02:27,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3812 transitions. [2023-11-19 08:02:27,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:27,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3812 transitions. [2023-11-19 08:02:27,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.2857142857143) internal successors, (3812), 14 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states 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 08:02:27,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 590.0) internal successors, (8850), 15 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states 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 08:02:27,068 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 590.0) internal successors, (8850), 15 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states 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 08:02:27,068 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 349 flow. Second operand 14 states and 3812 transitions. [2023-11-19 08:02:27,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 875 flow [2023-11-19 08:02:27,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 875 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:02:27,087 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 419 flow [2023-11-19 08:02:27,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=419, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-11-19 08:02:27,088 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 33 predicate places. [2023-11-19 08:02:27,088 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 419 flow [2023-11-19 08:02:27,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 263.92857142857144) internal successors, (3695), 14 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states 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 08:02:27,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:27,090 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 08:02:27,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23057853-e2a8-4bfb-9c24-3fb7ed1269ba/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:27,311 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 08:02:27,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:27,311 INFO L85 PathProgramCache]: Analyzing trace with hash -38917699, now seen corresponding path program 1 times [2023-11-19 08:02:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:27,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479583173] [2023-11-19 08:02:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:27,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:02:27,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:02:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:02:27,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:02:27,378 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:02:27,378 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 08:02:27,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 08:02:27,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 08:02:27,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 08:02:27,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 08:02:27,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 08:02:27,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:02:27,380 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-11-19 08:02:27,380 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:02:27,381 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:02:27,431 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 08:02:27,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 405 transitions, 837 flow [2023-11-19 08:02:27,555 INFO L124 PetriNetUnfolderBase]: 168/921 cut-off events. [2023-11-19 08:02:27,556 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:02:27,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 921 events. 168/921 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5102 event pairs, 1 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 651. Up to 16 conditions per place. [2023-11-19 08:02:27,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 405 transitions, 837 flow [2023-11-19 08:02:27,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 405 transitions, 837 flow [2023-11-19 08:02:27,571 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:02:27,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 405 transitions, 837 flow [2023-11-19 08:02:27,572 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 405 transitions, 837 flow [2023-11-19 08:02:27,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 405 transitions, 837 flow [2023-11-19 08:02:27,710 INFO L124 PetriNetUnfolderBase]: 168/921 cut-off events. [2023-11-19 08:02:27,710 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:02:27,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 921 events. 168/921 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5102 event pairs, 1 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 651. Up to 16 conditions per place. [2023-11-19 08:02:27,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 98496 [2023-11-19 08:02:32,781 INFO L134 LiptonReduction]: Checked pairs total: 149931 [2023-11-19 08:02:32,781 INFO L136 LiptonReduction]: Total number of compositions: 311 [2023-11-19 08:02:32,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:32,784 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;@4ff33a19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:32,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:02:32,787 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:02:32,788 INFO L124 PetriNetUnfolderBase]: 13/43 cut-off events. [2023-11-19 08:02:32,788 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:02:32,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:32,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:32,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:02:32,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:32,789 INFO L85 PathProgramCache]: Analyzing trace with hash 850984715, now seen corresponding path program 1 times [2023-11-19 08:02:32,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:32,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459202145] [2023-11-19 08:02:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:32,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:32,815 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 08:02:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:32,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459202145] [2023-11-19 08:02:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459202145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:32,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:32,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:32,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056557417] [2023-11-19 08:02:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:32,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:32,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:32,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 716 [2023-11-19 08:02:32,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 172 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 08:02:32,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:32,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 716 [2023-11-19 08:02:32,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand