./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.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_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/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_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/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_3b1227e9-b408-464e-a6f5-9586b230730c/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 ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:35,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:35,569 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:35,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:35,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:35,603 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:35,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:35,604 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:35,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:35,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:35,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:35,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:35,608 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:35,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:35,610 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:35,611 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:35,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:35,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:35,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:35,614 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:35,615 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:35,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:35,620 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:35,620 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:35,625 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:35,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:35,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:35,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:35,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:35,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:35,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:35,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:35,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:35,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:35,633 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:35,633 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:35,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:35,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:35,634 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:35,634 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_3b1227e9-b408-464e-a6f5-9586b230730c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 [2023-11-19 07:35:35,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:36,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:36,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:36,033 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:36,033 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:36,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-11-19 07:35:39,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:39,578 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:39,578 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-11-19 07:35:39,615 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/data/580232182/9b0a03dc07e4465499889890aa76d39f/FLAG70d59f63b [2023-11-19 07:35:39,751 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/data/580232182/9b0a03dc07e4465499889890aa76d39f [2023-11-19 07:35:39,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:39,755 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:39,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:39,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:39,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:39,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:39" (1/1) ... [2023-11-19 07:35:39,767 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ae1d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:39, skipping insertion in model container [2023-11-19 07:35:39,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:39" (1/1) ... [2023-11-19 07:35:39,835 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:40,540 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_3b1227e9-b408-464e-a6f5-9586b230730c/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-11-19 07:35:40,562 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,563 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,563 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,566 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:40,645 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:40,701 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_3b1227e9-b408-464e-a6f5-9586b230730c/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-11-19 07:35:40,706 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,707 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,707 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,709 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 07:35:40,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:40,831 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:40,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40 WrapperNode [2023-11-19 07:35:40,832 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:40,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:40,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:40,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:40,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:40,879 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:40,937 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 187 [2023-11-19 07:35:40,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:40,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:40,938 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:40,938 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:40,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:40,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:40,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:40,967 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:40,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:40,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:41,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:41,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:41,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:41,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:41,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:41,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:41,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (1/1) ... [2023-11-19 07:35:41,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:41,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:41,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:41,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:41,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:35:41,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:35:41,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:35:41,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:35:41,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:35:41,115 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:35:41,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:35:41,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:41,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:35:41,116 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:35:41,116 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:35:41,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:41,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:41,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:41,118 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:35:41,355 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:41,359 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:41,793 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:41,813 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:41,816 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 07:35:41,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:41 BoogieIcfgContainer [2023-11-19 07:35:41,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:41,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:41,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:41,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:41,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:39" (1/3) ... [2023-11-19 07:35:41,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7483ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:41, skipping insertion in model container [2023-11-19 07:35:41,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:40" (2/3) ... [2023-11-19 07:35:41,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7483ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:41, skipping insertion in model container [2023-11-19 07:35:41,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:41" (3/3) ... [2023-11-19 07:35:41,842 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2023-11-19 07:35:41,851 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:35:41,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:41,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:41,866 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:35:42,032 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:35:42,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 200 transitions, 407 flow [2023-11-19 07:35:42,172 INFO L124 PetriNetUnfolderBase]: 26/219 cut-off events. [2023-11-19 07:35:42,172 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:35:42,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 219 events. 26/219 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 562 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2023-11-19 07:35:42,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 200 transitions, 407 flow [2023-11-19 07:35:42,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 195 transitions, 394 flow [2023-11-19 07:35:42,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:42,204 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 195 transitions, 394 flow [2023-11-19 07:35:42,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 195 transitions, 394 flow [2023-11-19 07:35:42,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 394 flow [2023-11-19 07:35:42,256 INFO L124 PetriNetUnfolderBase]: 25/214 cut-off events. [2023-11-19 07:35:42,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:42,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 214 events. 25/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 502 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2023-11-19 07:35:42,263 INFO L119 LiptonReduction]: Number of co-enabled transitions 4550 [2023-11-19 07:36:06,653 WARN L293 SmtUtils]: Spent 7.94s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 07:36:08,237 INFO L134 LiptonReduction]: Checked pairs total: 4275 [2023-11-19 07:36:08,238 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-11-19 07:36:08,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:36:08,260 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;@6de08b9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:36:08,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:36:08,267 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:36:08,267 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-19 07:36:08,267 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:08,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-19 07:36:08,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:08,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1130117150, now seen corresponding path program 1 times [2023-11-19 07:36:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:08,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665172404] [2023-11-19 07:36:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:08,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:08,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:08,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665172404] [2023-11-19 07:36:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665172404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:08,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:08,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:36:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321558637] [2023-11-19 07:36:08,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:08,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:08,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 388 [2023-11-19 07:36:08,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:08,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:08,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 388 [2023-11-19 07:36:08,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:08,941 INFO L124 PetriNetUnfolderBase]: 48/112 cut-off events. [2023-11-19 07:36:08,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:08,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 48/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 271 event pairs, 33 based on Foata normal form. 8/92 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-11-19 07:36:08,944 INFO L140 encePairwiseOnDemand]: 375/388 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-19 07:36:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 112 flow [2023-11-19 07:36:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-11-19 07:36:08,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47680412371134023 [2023-11-19 07:36:08,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-11-19 07:36:08,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-11-19 07:36:08,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:08,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-11-19 07:36:09,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,025 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 76 flow. Second operand 3 states and 555 transitions. [2023-11-19 07:36:09,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 112 flow [2023-11-19 07:36:09,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:36:09,031 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 68 flow [2023-11-19 07:36:09,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-19 07:36:09,038 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-19 07:36:09,038 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 68 flow [2023-11-19 07:36:09,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:09,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:09,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:36:09,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:09,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1640821834, now seen corresponding path program 1 times [2023-11-19 07:36:09,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:09,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363539151] [2023-11-19 07:36:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:09,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363539151] [2023-11-19 07:36:09,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363539151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:36:09,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:36:09,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:36:09,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579507931] [2023-11-19 07:36:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:36:09,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:36:09,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:36:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:36:09,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 388 [2023-11-19 07:36:09,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:09,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 388 [2023-11-19 07:36:09,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:09,362 INFO L124 PetriNetUnfolderBase]: 48/114 cut-off events. [2023-11-19 07:36:09,362 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:36:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 114 events. 48/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 274 event pairs, 33 based on Foata normal form. 2/91 useless extension candidates. Maximal degree in co-relation 209. Up to 100 conditions per place. [2023-11-19 07:36:09,364 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-19 07:36:09,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 118 flow [2023-11-19 07:36:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:36:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:36:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-11-19 07:36:09,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46649484536082475 [2023-11-19 07:36:09,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-11-19 07:36:09,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-11-19 07:36:09,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:09,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-11-19 07:36:09,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,380 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 68 flow. Second operand 3 states and 543 transitions. [2023-11-19 07:36:09,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 118 flow [2023-11-19 07:36:09,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:09,382 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 80 flow [2023-11-19 07:36:09,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-19 07:36:09,383 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-11-19 07:36:09,383 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 80 flow [2023-11-19 07:36:09,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:09,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:09,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:36:09,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:09,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1058051079, now seen corresponding path program 1 times [2023-11-19 07:36:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:09,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300589396] [2023-11-19 07:36:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:09,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:09,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:09,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287164465] [2023-11-19 07:36:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:09,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:09,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:09,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:09,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:36:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:36:09,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:36:09,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:09,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:09,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300589396] [2023-11-19 07:36:09,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287164465] [2023-11-19 07:36:09,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287164465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:09,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:09,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 07:36:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842942420] [2023-11-19 07:36:09,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:09,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:36:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:36:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:09,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-19 07:36:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 173.83333333333334) internal successors, (1043), 6 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-19 07:36:09,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:10,096 INFO L124 PetriNetUnfolderBase]: 48/120 cut-off events. [2023-11-19 07:36:10,097 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:36:10,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 120 events. 48/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 286 event pairs, 33 based on Foata normal form. 6/101 useless extension candidates. Maximal degree in co-relation 216. Up to 100 conditions per place. [2023-11-19 07:36:10,102 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-19 07:36:10,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 146 flow [2023-11-19 07:36:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1061 transitions. [2023-11-19 07:36:10,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45575601374570446 [2023-11-19 07:36:10,108 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1061 transitions. [2023-11-19 07:36:10,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1061 transitions. [2023-11-19 07:36:10,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:10,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1061 transitions. [2023-11-19 07:36:10,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.83333333333334) internal successors, (1061), 6 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:10,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:10,122 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:10,123 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 80 flow. Second operand 6 states and 1061 transitions. [2023-11-19 07:36:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 146 flow [2023-11-19 07:36:10,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:10,127 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 118 flow [2023-11-19 07:36:10,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-19 07:36:10,129 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-11-19 07:36:10,129 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 118 flow [2023-11-19 07:36:10,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 173.83333333333334) internal successors, (1043), 6 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:10,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:10,131 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:10,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:10,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:10,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:10,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1704295306, now seen corresponding path program 2 times [2023-11-19 07:36:10,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:10,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515696059] [2023-11-19 07:36:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:10,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:10,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:10,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400650045] [2023-11-19 07:36:10,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:36:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:10,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:10,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:36:10,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:36:10,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:10,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:36:10,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:10,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:36:10,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515696059] [2023-11-19 07:36:10,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400650045] [2023-11-19 07:36:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400650045] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:10,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:10,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:36:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919484306] [2023-11-19 07:36:10,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:10,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:36:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:36:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:36:10,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-19 07:36:10,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 173.41666666666666) internal successors, (2081), 12 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:10,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:10,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-19 07:36:10,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:11,605 INFO L124 PetriNetUnfolderBase]: 48/132 cut-off events. [2023-11-19 07:36:11,605 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-19 07:36:11,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 132 events. 48/132 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 336 event pairs, 33 based on Foata normal form. 12/119 useless extension candidates. Maximal degree in co-relation 212. Up to 100 conditions per place. [2023-11-19 07:36:11,613 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-11-19 07:36:11,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 220 flow [2023-11-19 07:36:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:36:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:36:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2102 transitions. [2023-11-19 07:36:11,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146048109965636 [2023-11-19 07:36:11,624 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2102 transitions. [2023-11-19 07:36:11,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2102 transitions. [2023-11-19 07:36:11,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:11,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2102 transitions. [2023-11-19 07:36:11,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 175.16666666666666) internal successors, (2102), 12 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:11,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 388.0) internal successors, (5044), 13 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:11,654 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 388.0) internal successors, (5044), 13 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:11,655 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 118 flow. Second operand 12 states and 2102 transitions. [2023-11-19 07:36:11,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 220 flow [2023-11-19 07:36:11,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 206 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:11,661 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 200 flow [2023-11-19 07:36:11,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-11-19 07:36:11,663 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-19 07:36:11,664 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 200 flow [2023-11-19 07:36:11,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.41666666666666) internal successors, (2081), 12 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:11,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:11,667 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:36:11,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:11,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:11,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:11,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash -291849622, now seen corresponding path program 3 times [2023-11-19 07:36:11,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:11,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39466902] [2023-11-19 07:36:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:12,102 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:12,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359246405] [2023-11-19 07:36:12,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:36:12,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:12,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:12,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:12,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:36:12,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:36:12,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:12,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:36:12,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-19 07:36:12,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-19 07:36:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39466902] [2023-11-19 07:36:12,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359246405] [2023-11-19 07:36:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359246405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:12,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-19 07:36:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098706920] [2023-11-19 07:36:12,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:12,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:36:12,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:12,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:36:12,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:36:12,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-19 07:36:12,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:12,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:12,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-19 07:36:12,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:13,233 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2023-11-19 07:36:13,234 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-19 07:36:13,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 159 events. 50/159 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 33 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2023-11-19 07:36:13,236 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-19 07:36:13,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 693 flow [2023-11-19 07:36:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:36:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:36:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1067 transitions. [2023-11-19 07:36:13,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-19 07:36:13,241 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1067 transitions. [2023-11-19 07:36:13,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1067 transitions. [2023-11-19 07:36:13,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:13,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1067 transitions. [2023-11-19 07:36:13,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.83333333333334) internal successors, (1067), 6 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,252 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 200 flow. Second operand 6 states and 1067 transitions. [2023-11-19 07:36:13,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 693 flow [2023-11-19 07:36:13,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 499 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-11-19 07:36:13,260 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 235 flow [2023-11-19 07:36:13,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-11-19 07:36:13,261 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-19 07:36:13,261 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 235 flow [2023-11-19 07:36:13,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:13,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:13,262 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-19 07:36:13,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:13,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:13,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:13,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1892428466, now seen corresponding path program 4 times [2023-11-19 07:36:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913924919] [2023-11-19 07:36:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:14,204 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:14,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566914372] [2023-11-19 07:36:14,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:36:14,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:14,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:14,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:36:16,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:36:16,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:36:16,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 3629 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:36:16,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:36:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-19 07:36:16,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:36:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-19 07:36:16,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:36:16,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913924919] [2023-11-19 07:36:16,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:36:16,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566914372] [2023-11-19 07:36:16,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566914372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:36:16,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:36:16,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-19 07:36:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484146534] [2023-11-19 07:36:16,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:36:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:36:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:36:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:36:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:36:16,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-19 07:36:16,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 235 flow. Second operand has 24 states, 24 states have (on average 173.33333333333334) internal successors, (4160), 24 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:16,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:36:16,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-19 07:36:16,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:36:17,655 INFO L124 PetriNetUnfolderBase]: 50/207 cut-off events. [2023-11-19 07:36:17,656 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-11-19 07:36:17,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 207 events. 50/207 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 33 based on Foata normal form. 48/230 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2023-11-19 07:36:17,658 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-11-19 07:36:17,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 403 flow [2023-11-19 07:36:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:36:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:36:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4184 transitions. [2023-11-19 07:36:17,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493127147766323 [2023-11-19 07:36:17,680 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4184 transitions. [2023-11-19 07:36:17,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4184 transitions. [2023-11-19 07:36:17,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:36:17,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4184 transitions. [2023-11-19 07:36:17,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 174.33333333333334) internal successors, (4184), 24 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:17,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 388.0) internal successors, (9700), 25 states have internal predecessors, (9700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:17,772 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 388.0) internal successors, (9700), 25 states have internal predecessors, (9700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:17,772 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 235 flow. Second operand 24 states and 4184 transitions. [2023-11-19 07:36:17,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 403 flow [2023-11-19 07:36:17,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 07:36:17,779 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 469 flow [2023-11-19 07:36:17,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=469, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-11-19 07:36:17,782 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-11-19 07:36:17,783 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 469 flow [2023-11-19 07:36:17,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 173.33333333333334) internal successors, (4160), 24 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:36:17,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:36:17,786 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-19 07:36:17,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:36:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:36:18,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:36:18,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:36:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash 88997966, now seen corresponding path program 5 times [2023-11-19 07:36:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:36:18,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163738617] [2023-11-19 07:36:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:36:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:36:19,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:36:19,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463983307] [2023-11-19 07:36:19,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:36:19,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:36:19,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:36:19,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:36:19,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1227e9-b408-464e-a6f5-9586b230730c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process