./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 cf1a7837 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_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/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_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:04:16,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:04:16,698 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:04:16,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:04:16,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:04:16,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:04:16,767 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:04:16,768 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:04:16,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:04:16,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:04:16,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:04:16,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:04:16,778 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:04:16,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:04:16,781 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:04:16,781 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:04:16,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:04:16,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:04:16,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:04:16,783 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:04:16,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:04:16,784 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:04:16,785 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:04:16,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:04:16,785 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:04:16,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:04:16,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:04:16,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:04:16,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:16,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:04:16,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:04:16,790 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:04:16,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:04:16,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:04:16,791 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:04:16,791 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:04:16,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:04:16,792 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:04:16,792 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:04:16,792 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_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 [2023-11-12 02:04:17,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:04:17,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:04:17,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:04:17,249 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:04:17,250 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:04:17,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-11-12 02:04:21,031 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:04:21,331 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:04:21,331 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-11-12 02:04:21,357 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/data/05ae05ab4/88a624d29fd24b8d9d34abe9b270e804/FLAG0a09ca4e8 [2023-11-12 02:04:21,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/data/05ae05ab4/88a624d29fd24b8d9d34abe9b270e804 [2023-11-12 02:04:21,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:04:21,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:04:21,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:21,394 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:04:21,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:04:21,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:21" (1/1) ... [2023-11-12 02:04:21,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59faea80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:21, skipping insertion in model container [2023-11-12 02:04:21,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:21" (1/1) ... [2023-11-12 02:04:21,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:04:22,000 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_709b279a-5580-4666-950d-5594fcc57045/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-11-12 02:04:22,024 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,025 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,025 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,028 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:22,100 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:04:22,161 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_709b279a-5580-4666-950d-5594fcc57045/sv-benchmarks/c/goblint-regression/28-race_reach_91-arrayloop2_racefree.i[47038,47051] [2023-11-12 02:04:22,180 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,181 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,182 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,183 WARN L1577 CHandler]: Possible shadowing of function new [2023-11-12 02:04:22,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:22,280 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:04:22,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22 WrapperNode [2023-11-12 02:04:22,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:22,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:22,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:04:22,282 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:04:22,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,370 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 187 [2023-11-12 02:04:22,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:22,379 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:04:22,379 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:04:22,379 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:04:22,389 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,402 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:04:22,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:04:22,483 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:04:22,483 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:04:22,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (1/1) ... [2023-11-12 02:04:22,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:22,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:22,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:04:22,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:04:22,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:04:22,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:04:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:04:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:04:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:04:22,576 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:04:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:04:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:04:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:04:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:04:22,577 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:04:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:04:22,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:04:22,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:04:22,579 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:04:22,819 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:04:22,821 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:04:23,183 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:04:23,194 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:04:23,194 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-12 02:04:23,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:23 BoogieIcfgContainer [2023-11-12 02:04:23,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:04:23,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:04:23,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:04:23,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:04:23,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:04:21" (1/3) ... [2023-11-12 02:04:23,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3916d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:23, skipping insertion in model container [2023-11-12 02:04:23,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:22" (2/3) ... [2023-11-12 02:04:23,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3916d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:23, skipping insertion in model container [2023-11-12 02:04:23,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:23" (3/3) ... [2023-11-12 02:04:23,221 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2023-11-12 02:04:23,236 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:04:23,251 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:04:23,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:04:23,252 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:04:23,426 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:04:23,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 200 transitions, 407 flow [2023-11-12 02:04:23,636 INFO L124 PetriNetUnfolderBase]: 26/219 cut-off events. [2023-11-12 02:04:23,636 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:04:23,647 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. [2023-11-12 02:04:23,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 200 transitions, 407 flow [2023-11-12 02:04:23,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 195 transitions, 394 flow [2023-11-12 02:04:23,660 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:04:23,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 195 transitions, 394 flow [2023-11-12 02:04:23,674 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 195 transitions, 394 flow [2023-11-12 02:04:23,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 394 flow [2023-11-12 02:04:23,765 INFO L124 PetriNetUnfolderBase]: 25/214 cut-off events. [2023-11-12 02:04:23,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:04:23,767 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. [2023-11-12 02:04:23,772 INFO L119 LiptonReduction]: Number of co-enabled transitions 4550 [2023-11-12 02:04:48,602 WARN L293 SmtUtils]: Spent 6.42s 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) [2023-11-12 02:04:50,882 INFO L134 LiptonReduction]: Checked pairs total: 4275 [2023-11-12 02:04:50,883 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-11-12 02:04:50,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:04:50,906 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;@5a9bf809, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:04:50,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:04:50,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:04:50,914 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-12 02:04:50,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:04:50,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:50,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-12 02:04:50,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:50,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:50,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1130117150, now seen corresponding path program 1 times [2023-11-12 02:04:50,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:50,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153660647] [2023-11-12 02:04:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:04:51,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:51,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153660647] [2023-11-12 02:04:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153660647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:51,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:51,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229499290] [2023-11-12 02:04:51,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:51,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:51,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:51,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:51,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 388 [2023-11-12 02:04:51,492 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) [2023-11-12 02:04:51,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:51,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 388 [2023-11-12 02:04:51,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:51,741 INFO L124 PetriNetUnfolderBase]: 48/112 cut-off events. [2023-11-12 02:04:51,742 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:04:51,743 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. [2023-11-12 02:04:51,745 INFO L140 encePairwiseOnDemand]: 375/388 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-12 02:04:51,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 112 flow [2023-11-12 02:04:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:04:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-11-12 02:04:51,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47680412371134023 [2023-11-12 02:04:51,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-11-12 02:04:51,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-11-12 02:04:51,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:51,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-11-12 02:04:51,801 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) [2023-11-12 02:04:51,812 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) [2023-11-12 02:04:51,814 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) [2023-11-12 02:04:51,817 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 76 flow. Second operand 3 states and 555 transitions. [2023-11-12 02:04:51,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 112 flow [2023-11-12 02:04:51,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:04:51,823 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 68 flow [2023-11-12 02:04:51,826 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} [2023-11-12 02:04:51,831 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-12 02:04:51,831 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 68 flow [2023-11-12 02:04:51,832 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) [2023-11-12 02:04:51,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:51,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:51,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:04:51,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:51,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1640821834, now seen corresponding path program 1 times [2023-11-12 02:04:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:51,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143328811] [2023-11-12 02:04:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:04:52,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:52,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143328811] [2023-11-12 02:04:52,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143328811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:52,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:52,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:04:52,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377368038] [2023-11-12 02:04:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:52,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:52,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 388 [2023-11-12 02:04:52,068 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) [2023-11-12 02:04:52,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:52,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 388 [2023-11-12 02:04:52,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:52,266 INFO L124 PetriNetUnfolderBase]: 48/114 cut-off events. [2023-11-12 02:04:52,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:04:52,267 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. [2023-11-12 02:04:52,268 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-12 02:04:52,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 118 flow [2023-11-12 02:04:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:04:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-11-12 02:04:52,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46649484536082475 [2023-11-12 02:04:52,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-11-12 02:04:52,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-11-12 02:04:52,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:52,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-11-12 02:04:52,276 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) [2023-11-12 02:04:52,281 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) [2023-11-12 02:04:52,282 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) [2023-11-12 02:04:52,283 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 68 flow. Second operand 3 states and 543 transitions. [2023-11-12 02:04:52,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 118 flow [2023-11-12 02:04:52,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:04:52,285 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 80 flow [2023-11-12 02:04:52,286 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} [2023-11-12 02:04:52,287 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-11-12 02:04:52,287 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 80 flow [2023-11-12 02:04:52,288 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) [2023-11-12 02:04:52,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:52,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:52,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:04:52,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:52,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:52,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1058051079, now seen corresponding path program 1 times [2023-11-12 02:04:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:52,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353298361] [2023-11-12 02:04:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:52,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:52,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486086028] [2023-11-12 02:04:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:52,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:52,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:52,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:52,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:04:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:52,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:04:52,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:04:52,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:04:52,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353298361] [2023-11-12 02:04:52,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486086028] [2023-11-12 02:04:52,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486086028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:52,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:04:52,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-12 02:04:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288816915] [2023-11-12 02:04:52,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:04:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:04:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:04:52,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-12 02:04:52,672 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) [2023-11-12 02:04:52,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:52,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-12 02:04:52,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:53,149 INFO L124 PetriNetUnfolderBase]: 48/120 cut-off events. [2023-11-12 02:04:53,149 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:04:53,150 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. [2023-11-12 02:04:53,151 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-12 02:04:53,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 146 flow [2023-11-12 02:04:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:04:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:04:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1061 transitions. [2023-11-12 02:04:53,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45575601374570446 [2023-11-12 02:04:53,158 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1061 transitions. [2023-11-12 02:04:53,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1061 transitions. [2023-11-12 02:04:53,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:53,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1061 transitions. [2023-11-12 02:04:53,163 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) [2023-11-12 02:04:53,170 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) [2023-11-12 02:04:53,173 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) [2023-11-12 02:04:53,174 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 80 flow. Second operand 6 states and 1061 transitions. [2023-11-12 02:04:53,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 146 flow [2023-11-12 02:04:53,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:04:53,177 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 118 flow [2023-11-12 02:04:53,177 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} [2023-11-12 02:04:53,178 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-11-12 02:04:53,179 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 118 flow [2023-11-12 02:04:53,180 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) [2023-11-12 02:04:53,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:53,181 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:53,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:53,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:53,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:53,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1704295306, now seen corresponding path program 2 times [2023-11-12 02:04:53,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023700271] [2023-11-12 02:04:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:53,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:53,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654476479] [2023-11-12 02:04:53,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:04:53,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:53,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:53,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:04:53,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:04:53,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:04:53,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:04:53,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:04:53,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:04:54,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:54,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023700271] [2023-11-12 02:04:54,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:54,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654476479] [2023-11-12 02:04:54,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654476479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:54,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:04:54,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 02:04:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851782506] [2023-11-12 02:04:54,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:04:54,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:04:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:04:54,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-12 02:04:54,161 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) [2023-11-12 02:04:54,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:54,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-12 02:04:54,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:55,053 INFO L124 PetriNetUnfolderBase]: 48/132 cut-off events. [2023-11-12 02:04:55,054 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-12 02:04:55,054 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. [2023-11-12 02:04:55,056 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-11-12 02:04:55,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 220 flow [2023-11-12 02:04:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:04:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:04:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2102 transitions. [2023-11-12 02:04:55,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146048109965636 [2023-11-12 02:04:55,066 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2102 transitions. [2023-11-12 02:04:55,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2102 transitions. [2023-11-12 02:04:55,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:55,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2102 transitions. [2023-11-12 02:04:55,076 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) [2023-11-12 02:04:55,088 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) [2023-11-12 02:04:55,091 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) [2023-11-12 02:04:55,091 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 118 flow. Second operand 12 states and 2102 transitions. [2023-11-12 02:04:55,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 220 flow [2023-11-12 02:04:55,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 206 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:04:55,096 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 200 flow [2023-11-12 02:04:55,096 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} [2023-11-12 02:04:55,097 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-12 02:04:55,097 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 200 flow [2023-11-12 02:04:55,099 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) [2023-11-12 02:04:55,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:55,099 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:55,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:55,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:55,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:55,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash -291849622, now seen corresponding path program 3 times [2023-11-12 02:04:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606679632] [2023-11-12 02:04:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:55,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:55,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:55,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053599531] [2023-11-12 02:04:55,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:04:55,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:55,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:55,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:55,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:04:55,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:04:55,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:04:55,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:04:55,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-12 02:04:56,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-12 02:04:56,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606679632] [2023-11-12 02:04:56,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053599531] [2023-11-12 02:04:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053599531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:56,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:04:56,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-12 02:04:56,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975736488] [2023-11-12 02:04:56,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:56,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:04:56,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:04:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:04:56,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-12 02:04:56,212 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) [2023-11-12 02:04:56,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:56,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-12 02:04:56,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:56,852 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2023-11-12 02:04:56,852 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-12 02:04:56,854 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. [2023-11-12 02:04:56,855 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-12 02:04:56,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 693 flow [2023-11-12 02:04:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:04:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:04:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1067 transitions. [2023-11-12 02:04:56,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-12 02:04:56,861 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1067 transitions. [2023-11-12 02:04:56,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1067 transitions. [2023-11-12 02:04:56,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:56,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1067 transitions. [2023-11-12 02:04:56,866 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) [2023-11-12 02:04:56,871 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) [2023-11-12 02:04:56,872 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) [2023-11-12 02:04:56,873 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 200 flow. Second operand 6 states and 1067 transitions. [2023-11-12 02:04:56,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 693 flow [2023-11-12 02:04:56,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 499 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-11-12 02:04:56,881 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 235 flow [2023-11-12 02:04:56,882 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} [2023-11-12 02:04:56,883 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-12 02:04:56,883 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 235 flow [2023-11-12 02:04:56,884 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) [2023-11-12 02:04:56,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:56,884 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-12 02:04:56,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:57,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:57,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:57,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:57,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1892428466, now seen corresponding path program 4 times [2023-11-12 02:04:57,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:57,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780934790] [2023-11-12 02:04:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:57,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:57,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:57,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376297681] [2023-11-12 02:04:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:04:57,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:57,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:57,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:58,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:05:00,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:05:00,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:00,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 3629 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:00,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-12 02:05:00,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-12 02:05:00,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:00,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780934790] [2023-11-12 02:05:00,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:05:00,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376297681] [2023-11-12 02:05:00,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376297681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:00,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:05:00,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-12 02:05:00,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710309051] [2023-11-12 02:05:00,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:00,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:05:00,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:05:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:05:00,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-11-12 02:05:00,761 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) [2023-11-12 02:05:00,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:00,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-11-12 02:05:00,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:01,819 INFO L124 PetriNetUnfolderBase]: 50/207 cut-off events. [2023-11-12 02:05:01,819 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-11-12 02:05:01,821 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. [2023-11-12 02:05:01,822 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-11-12 02:05:01,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 403 flow [2023-11-12 02:05:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:05:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:05:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4184 transitions. [2023-11-12 02:05:01,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493127147766323 [2023-11-12 02:05:01,839 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4184 transitions. [2023-11-12 02:05:01,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4184 transitions. [2023-11-12 02:05:01,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:01,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4184 transitions. [2023-11-12 02:05:01,855 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) [2023-11-12 02:05:01,875 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) [2023-11-12 02:05:01,879 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) [2023-11-12 02:05:01,880 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 235 flow. Second operand 24 states and 4184 transitions. [2023-11-12 02:05:01,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 403 flow [2023-11-12 02:05:01,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-12 02:05:01,886 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 469 flow [2023-11-12 02:05:01,886 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} [2023-11-12 02:05:01,887 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-11-12 02:05:01,887 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 469 flow [2023-11-12 02:05:01,890 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) [2023-11-12 02:05:01,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:01,890 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-12 02:05:01,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:02,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:02,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:05:02,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:02,105 INFO L85 PathProgramCache]: Analyzing trace with hash 88997966, now seen corresponding path program 5 times [2023-11-12 02:05:02,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:02,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536229993] [2023-11-12 02:05:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:02,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:03,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:05:03,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182010892] [2023-11-12 02:05:03,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:05:03,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:03,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:03,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709b279a-5580-4666-950d-5594fcc57045/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process