./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/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_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/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_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:53,990 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:54,127 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:03:54,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:54,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:54,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:54,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:54,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:54,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:54,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:54,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:54,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:54,189 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:54,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:54,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:03:54,192 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:54,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:54,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:54,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:54,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:03:54,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:54,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:03:54,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:54,197 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:03:54,198 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:54,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:54,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:54,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:54,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:54,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:54,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:54,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:03:54,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:54,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:54,203 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:54,203 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:03:54,204 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:54,204 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:54,204 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:54,204 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_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2023-11-19 08:03:54,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:54,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:54,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:54,515 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:54,516 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:54,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-11-19 08:03:57,616 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:57,974 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:57,975 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-11-19 08:03:57,998 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/data/4cdd37679/6dcf77311dd74e15ba3fbad16545c748/FLAGb01c19e65 [2023-11-19 08:03:58,016 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/data/4cdd37679/6dcf77311dd74e15ba3fbad16545c748 [2023-11-19 08:03:58,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:58,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:58,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:58,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:58,038 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:58,039 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:58" (1/1) ... [2023-11-19 08:03:58,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2dafd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:58, skipping insertion in model container [2023-11-19 08:03:58,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:58" (1/1) ... [2023-11-19 08:03:58,121 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:58,817 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_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-11-19 08:03:58,842 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:58,842 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:58,843 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:58,845 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:58,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:58,940 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:59,010 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_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-11-19 08:03:59,013 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:59,015 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:59,016 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:59,017 WARN L1588 CHandler]: Possible shadowing of function new [2023-11-19 08:03:59,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:59,143 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:59,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59 WrapperNode [2023-11-19 08:03:59,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:59,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:59,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:59,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:59,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,251 INFO L138 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 231 [2023-11-19 08:03:59,251 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:59,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:59,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:59,252 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:59,262 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,280 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,314 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:59,335 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:59,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:59,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:59,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (1/1) ... [2023-11-19 08:03:59,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:59,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:59,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 08:03:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:03:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:03:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 08:03:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 08:03:59,419 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 08:03:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:59,421 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:03:59,638 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:59,641 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:04:00,165 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:04:00,178 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:04:00,178 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-19 08:04:00,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:00 BoogieIcfgContainer [2023-11-19 08:04:00,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:04:00,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:04:00,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:04:00,190 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:04:00,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:58" (1/3) ... [2023-11-19 08:04:00,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481b3f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:00, skipping insertion in model container [2023-11-19 08:04:00,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:59" (2/3) ... [2023-11-19 08:04:00,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481b3f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:00, skipping insertion in model container [2023-11-19 08:04:00,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:00" (3/3) ... [2023-11-19 08:04:00,193 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2023-11-19 08:04:00,203 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:04:00,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:04:00,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:04:00,215 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:04:00,334 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 08:04:00,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 529 flow [2023-11-19 08:04:00,477 INFO L124 PetriNetUnfolderBase]: 29/280 cut-off events. [2023-11-19 08:04:00,477 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:04:00,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 280 events. 29/280 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 596 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 158. Up to 4 conditions per place. [2023-11-19 08:04:00,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 529 flow [2023-11-19 08:04:00,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 256 transitions, 516 flow [2023-11-19 08:04:00,500 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:04:00,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 256 transitions, 516 flow [2023-11-19 08:04:00,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 256 transitions, 516 flow [2023-11-19 08:04:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 256 transitions, 516 flow [2023-11-19 08:04:00,570 INFO L124 PetriNetUnfolderBase]: 28/275 cut-off events. [2023-11-19 08:04:00,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:04:00,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 275 events. 28/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 547 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 158. Up to 4 conditions per place. [2023-11-19 08:04:00,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 4550 [2023-11-19 08:04:23,030 WARN L293 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 08:04:35,455 WARN L293 SmtUtils]: Spent 9.43s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-19 08:04:38,636 INFO L134 LiptonReduction]: Checked pairs total: 4262 [2023-11-19 08:04:38,636 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-11-19 08:04:38,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:38,658 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;@deb29db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:38,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 08:04:38,665 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:04:38,666 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-19 08:04:38,666 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:04:38,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:38,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-19 08:04:38,667 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 08:04:38,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:38,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1439128457, now seen corresponding path program 1 times [2023-11-19 08:04:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:38,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136490124] [2023-11-19 08:04:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:39,082 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 08:04:39,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:39,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136490124] [2023-11-19 08:04:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136490124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:39,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791267656] [2023-11-19 08:04:39,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:39,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:39,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:39,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 526 [2023-11-19 08:04:39,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:39,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 526 [2023-11-19 08:04:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:39,448 INFO L124 PetriNetUnfolderBase]: 48/113 cut-off events. [2023-11-19 08:04:39,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:04:39,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 113 events. 48/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 33 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-11-19 08:04:39,453 INFO L140 encePairwiseOnDemand]: 513/526 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-19 08:04:39,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 112 flow [2023-11-19 08:04:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-11-19 08:04:39,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46387832699619774 [2023-11-19 08:04:39,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-11-19 08:04:39,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-11-19 08:04:39,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:39,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-11-19 08:04:39,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,503 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 76 flow. Second operand 3 states and 732 transitions. [2023-11-19 08:04:39,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 112 flow [2023-11-19 08:04:39,506 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 08:04:39,508 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 68 flow [2023-11-19 08:04:39,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, 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 08:04:39,514 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-19 08:04:39,514 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 68 flow [2023-11-19 08:04:39,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:39,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:39,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:04:39,516 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 08:04:39,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash 64048467, now seen corresponding path program 1 times [2023-11-19 08:04:39,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:39,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716706435] [2023-11-19 08:04:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:39,722 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 08:04:39,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716706435] [2023-11-19 08:04:39,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716706435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:39,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:39,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:39,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211467434] [2023-11-19 08:04:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:39,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:39,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:39,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:39,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 526 [2023-11-19 08:04:39,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:39,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:39,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 526 [2023-11-19 08:04:39,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:40,037 INFO L124 PetriNetUnfolderBase]: 48/115 cut-off events. [2023-11-19 08:04:40,037 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:04:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 115 events. 48/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 33 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 210. Up to 100 conditions per place. [2023-11-19 08:04:40,038 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-19 08:04:40,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 118 flow [2023-11-19 08:04:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2023-11-19 08:04:40,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45627376425855515 [2023-11-19 08:04:40,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2023-11-19 08:04:40,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2023-11-19 08:04:40,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:40,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2023-11-19 08:04:40,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:40,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:40,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 526.0) internal successors, (2104), 4 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:40,055 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 68 flow. Second operand 3 states and 720 transitions. [2023-11-19 08:04:40,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 118 flow [2023-11-19 08:04:40,056 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 08:04:40,057 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 80 flow [2023-11-19 08:04:40,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, 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 08:04:40,059 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-11-19 08:04:40,059 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 80 flow [2023-11-19 08:04:40,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:40,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:40,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:40,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:04:40,061 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 08:04:40,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:40,062 INFO L85 PathProgramCache]: Analyzing trace with hash -760695699, now seen corresponding path program 1 times [2023-11-19 08:04:40,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:40,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277915408] [2023-11-19 08:04:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:40,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:40,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:40,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938730433] [2023-11-19 08:04:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:40,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:40,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:40,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:40,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:40,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:04:40,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:40,368 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 08:04:40,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:40,395 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 08:04:40,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:40,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277915408] [2023-11-19 08:04:40,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:40,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938730433] [2023-11-19 08:04:40,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938730433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:40,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:40,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-19 08:04:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463131982] [2023-11-19 08:04:40,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:40,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:04:40,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:04:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:04:40,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-19 08:04:40,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 232.83333333333334) internal successors, (1397), 6 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:40,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:40,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-19 08:04:40,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:41,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-19 08:04:42,261 INFO L124 PetriNetUnfolderBase]: 48/121 cut-off events. [2023-11-19 08:04:42,262 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:04:42,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 121 events. 48/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 33 based on Foata normal form. 6/102 useless extension candidates. Maximal degree in co-relation 217. Up to 100 conditions per place. [2023-11-19 08:04:42,263 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-19 08:04:42,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 146 flow [2023-11-19 08:04:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:04:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:04:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1415 transitions. [2023-11-19 08:04:42,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44835234474017743 [2023-11-19 08:04:42,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1415 transitions. [2023-11-19 08:04:42,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1415 transitions. [2023-11-19 08:04:42,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:42,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1415 transitions. [2023-11-19 08:04:42,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.83333333333334) internal successors, (1415), 6 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:42,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:42,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:42,290 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 80 flow. Second operand 6 states and 1415 transitions. [2023-11-19 08:04:42,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 146 flow [2023-11-19 08:04:42,291 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 08:04:42,293 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 118 flow [2023-11-19 08:04:42,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, 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 08:04:42,294 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-11-19 08:04:42,294 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 118 flow [2023-11-19 08:04:42,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 232.83333333333334) internal successors, (1397), 6 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:42,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:42,296 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:42,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:04:42,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:42,513 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 08:04:42,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1308671021, now seen corresponding path program 2 times [2023-11-19 08:04:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:42,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647903464] [2023-11-19 08:04:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:42,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:42,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585798958] [2023-11-19 08:04:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:42,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:42,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:42,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:42,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:04:42,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:42,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:04:42,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:42,982 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 08:04:42,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:43,054 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 08:04:43,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647903464] [2023-11-19 08:04:43,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585798958] [2023-11-19 08:04:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585798958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:43,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:43,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 08:04:43,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438540667] [2023-11-19 08:04:43,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:43,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:04:43,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:04:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:04:43,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-19 08:04:43,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 118 flow. Second operand has 12 states, 12 states have (on average 232.41666666666666) internal successors, (2789), 12 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:43,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:43,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-19 08:04:43,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:43,851 INFO L124 PetriNetUnfolderBase]: 48/133 cut-off events. [2023-11-19 08:04:43,852 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-19 08:04:43,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 133 events. 48/133 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 33 based on Foata normal form. 12/120 useless extension candidates. Maximal degree in co-relation 213. Up to 100 conditions per place. [2023-11-19 08:04:43,853 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-11-19 08:04:43,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 220 flow [2023-11-19 08:04:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:04:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:04:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2810 transitions. [2023-11-19 08:04:43,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518377693282635 [2023-11-19 08:04:43,867 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2810 transitions. [2023-11-19 08:04:43,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2810 transitions. [2023-11-19 08:04:43,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:43,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2810 transitions. [2023-11-19 08:04:43,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 234.16666666666666) internal successors, (2810), 12 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:43,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 526.0) internal successors, (6838), 13 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:43,900 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 526.0) internal successors, (6838), 13 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:43,900 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 118 flow. Second operand 12 states and 2810 transitions. [2023-11-19 08:04:43,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 220 flow [2023-11-19 08:04:43,903 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 08:04:43,905 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 200 flow [2023-11-19 08:04:43,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, 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 08:04:43,906 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-19 08:04:43,906 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 200 flow [2023-11-19 08:04:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 232.41666666666666) internal successors, (2789), 12 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:43,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:43,909 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:43,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:44,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:44,129 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 08:04:44,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash 29597075, now seen corresponding path program 3 times [2023-11-19 08:04:44,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:44,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810771632] [2023-11-19 08:04:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:44,341 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:44,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544861716] [2023-11-19 08:04:44,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:04:44,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:44,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:44,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:44,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:44,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:04:44,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:44,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:04:44,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:44,833 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 08:04:44,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:45,038 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 08:04:45,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810771632] [2023-11-19 08:04:45,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544861716] [2023-11-19 08:04:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544861716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:45,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:45,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-19 08:04:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715211075] [2023-11-19 08:04:45,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:45,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:04:45,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:04:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:04:45,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-19 08:04:45,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 233.16666666666666) internal successors, (1399), 6 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:45,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:45,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-19 08:04:45,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:45,769 INFO L124 PetriNetUnfolderBase]: 50/160 cut-off events. [2023-11-19 08:04:45,769 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-19 08:04:45,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 160 events. 50/160 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 33 based on Foata normal form. 3/138 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2023-11-19 08:04:45,771 INFO L140 encePairwiseOnDemand]: 522/526 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-19 08:04:45,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 693 flow [2023-11-19 08:04:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:04:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:04:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1421 transitions. [2023-11-19 08:04:45,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4502534854245881 [2023-11-19 08:04:45,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1421 transitions. [2023-11-19 08:04:45,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1421 transitions. [2023-11-19 08:04:45,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:45,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1421 transitions. [2023-11-19 08:04:45,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 236.83333333333334) internal successors, (1421), 6 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:45,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:45,790 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 526.0) internal successors, (3682), 7 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:45,790 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 200 flow. Second operand 6 states and 1421 transitions. [2023-11-19 08:04:45,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 693 flow [2023-11-19 08:04:45,797 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 08:04:45,798 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 235 flow [2023-11-19 08:04:45,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, 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 08:04:45,800 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-19 08:04:45,800 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 235 flow [2023-11-19 08:04:45,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.16666666666666) internal successors, (1399), 6 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:45,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:45,801 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-19 08:04:45,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:46,019 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 08:04:46,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1766575335, now seen corresponding path program 4 times [2023-11-19 08:04:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:46,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214529655] [2023-11-19 08:04:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:46,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:46,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:46,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90915747] [2023-11-19 08:04:46,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:04:46,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:46,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:46,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:46,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:04:48,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:04:48,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:48,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 3621 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:04:48,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:48,819 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 08:04:48,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:49,072 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 08:04:49,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:49,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214529655] [2023-11-19 08:04:49,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:49,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90915747] [2023-11-19 08:04:49,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90915747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:49,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:49,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-19 08:04:49,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159068491] [2023-11-19 08:04:49,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:49,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 08:04:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 08:04:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-19 08:04:49,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 526 [2023-11-19 08:04:49,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 235 flow. Second operand has 24 states, 24 states have (on average 232.33333333333334) internal successors, (5576), 24 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:49,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:49,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 526 [2023-11-19 08:04:49,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:51,050 INFO L124 PetriNetUnfolderBase]: 50/208 cut-off events. [2023-11-19 08:04:51,051 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-11-19 08:04:51,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 208 events. 50/208 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 33 based on Foata normal form. 48/231 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2023-11-19 08:04:51,053 INFO L140 encePairwiseOnDemand]: 523/526 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-11-19 08:04:51,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 403 flow [2023-11-19 08:04:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:04:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 08:04:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5600 transitions. [2023-11-19 08:04:51,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435994930291508 [2023-11-19 08:04:51,076 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5600 transitions. [2023-11-19 08:04:51,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5600 transitions. [2023-11-19 08:04:51,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:51,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5600 transitions. [2023-11-19 08:04:51,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 233.33333333333334) internal successors, (5600), 24 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:51,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 526.0) internal successors, (13150), 25 states have internal predecessors, (13150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:51,134 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 526.0) internal successors, (13150), 25 states have internal predecessors, (13150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:51,142 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 235 flow. Second operand 24 states and 5600 transitions. [2023-11-19 08:04:51,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 403 flow [2023-11-19 08:04:51,146 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 08:04:51,148 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 469 flow [2023-11-19 08:04:51,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=526, 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 08:04:51,150 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-11-19 08:04:51,151 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 469 flow [2023-11-19 08:04:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 232.33333333333334) internal successors, (5576), 24 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:51,153 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-19 08:04:51,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:51,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:51,369 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 08:04:51,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1853022489, now seen corresponding path program 5 times [2023-11-19 08:04:51,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:51,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492680255] [2023-11-19 08:04:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:51,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:52,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:52,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094195072] [2023-11-19 08:04:52,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:04:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:52,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:52,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:52,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f8b8f7c-c07a-414e-8fa3-9e89100be6da/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process