./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:17:58,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:17:58,833 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:17:58,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:17:58,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:17:58,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:17:58,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:17:58,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:17:58,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:17:58,891 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:17:58,892 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:17:58,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:17:58,893 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:17:58,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:17:58,895 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:17:58,896 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:17:58,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:17:58,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:17:58,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:17:58,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:17:58,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:17:58,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:17:58,901 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:17:58,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:17:58,902 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:17:58,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:17:58,904 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:17:58,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:17:58,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:58,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:17:58,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:17:58,907 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:17:58,907 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:17:58,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:17:58,908 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:17:58,909 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:17:58,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:17:58,910 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:17:58,911 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:17:58,911 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_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2023-11-06 22:17:59,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:17:59,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:17:59,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:17:59,314 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:17:59,315 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:17:59,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-11-06 22:18:02,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:18:02,797 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:18:02,798 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-11-06 22:18:02,812 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/data/9b24c0ede/341289b82d3841a19a5b115a718a6b6c/FLAG13ba9b9cc [2023-11-06 22:18:02,825 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/data/9b24c0ede/341289b82d3841a19a5b115a718a6b6c [2023-11-06 22:18:02,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:18:02,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:18:02,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:02,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:18:02,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:18:02,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:02" (1/1) ... [2023-11-06 22:18:02,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133f8554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:02, skipping insertion in model container [2023-11-06 22:18:02,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:18:02" (1/1) ... [2023-11-06 22:18:02,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:18:03,083 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_9ed078df-a0d8-4572-ab37-3cbe493d84ed/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-11-06 22:18:03,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:03,106 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:18:03,134 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_9ed078df-a0d8-4572-ab37-3cbe493d84ed/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2023-11-06 22:18:03,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:18:03,148 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:18:03,148 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:18:03,157 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:18:03,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03 WrapperNode [2023-11-06 22:18:03,158 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:18:03,159 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:03,159 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:18:03,159 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:18:03,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,213 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 254 [2023-11-06 22:18:03,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:18:03,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:18:03,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:18:03,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:18:03,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:18:03,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:18:03,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:18:03,312 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:18:03,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (1/1) ... [2023-11-06 22:18:03,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:18:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:03,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:18:03,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:18:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:18:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:18:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:18:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:18:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:18:03,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:18:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:18:03,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:18:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:18:03,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:18:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:18:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:18:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:18:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:18:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:18:03,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:18:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:18:03,424 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:18:03,535 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:18:03,537 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:18:04,075 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:18:04,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:18:04,277 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 22:18:04,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:04 BoogieIcfgContainer [2023-11-06 22:18:04,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:18:04,285 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:18:04,285 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:18:04,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:18:04,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:18:02" (1/3) ... [2023-11-06 22:18:04,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64881463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:04, skipping insertion in model container [2023-11-06 22:18:04,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:18:03" (2/3) ... [2023-11-06 22:18:04,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64881463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:18:04, skipping insertion in model container [2023-11-06 22:18:04,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:18:04" (3/3) ... [2023-11-06 22:18:04,295 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-11-06 22:18:04,306 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:18:04,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:18:04,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:18:04,318 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:18:04,437 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:18:04,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 455 flow [2023-11-06 22:18:04,606 INFO L124 PetriNetUnfolderBase]: 18/214 cut-off events. [2023-11-06 22:18:04,606 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:04,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 214 events. 18/214 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 176. Up to 3 conditions per place. [2023-11-06 22:18:04,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 217 transitions, 455 flow [2023-11-06 22:18:04,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 203 transitions, 424 flow [2023-11-06 22:18:04,624 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:18:04,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 203 transitions, 424 flow [2023-11-06 22:18:04,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 203 transitions, 424 flow [2023-11-06 22:18:04,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 203 transitions, 424 flow [2023-11-06 22:18:04,766 INFO L124 PetriNetUnfolderBase]: 18/203 cut-off events. [2023-11-06 22:18:04,766 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:04,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 203 events. 18/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 114 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 176. Up to 3 conditions per place. [2023-11-06 22:18:04,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 1528 [2023-11-06 22:18:13,485 INFO L134 LiptonReduction]: Checked pairs total: 2195 [2023-11-06 22:18:13,486 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-11-06 22:18:13,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:18:13,508 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=LoopsAndPotentialCycles, 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;@6b0174ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:18:13,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:18:13,516 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:18:13,516 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-06 22:18:13,516 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:18:13,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:13,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:13,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:13,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -318056629, now seen corresponding path program 1 times [2023-11-06 22:18:13,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:13,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136895508] [2023-11-06 22:18:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:13,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:13,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136895508] [2023-11-06 22:18:13,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136895508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:13,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:13,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:18:13,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297477811] [2023-11-06 22:18:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:18:13,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:18:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:18:13,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 430 [2023-11-06 22:18:13,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 201.0) internal successors, (402), 2 states have internal predecessors, (402), 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) [2023-11-06 22:18:13,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:13,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 430 [2023-11-06 22:18:13,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:14,105 INFO L124 PetriNetUnfolderBase]: 324/461 cut-off events. [2023-11-06 22:18:14,106 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-06 22:18:14,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 461 events. 324/461 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1494 event pairs, 167 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 739. Up to 453 conditions per place. [2023-11-06 22:18:14,119 INFO L140 encePairwiseOnDemand]: 429/430 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-11-06 22:18:14,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-11-06 22:18:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:18:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:18:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 409 transitions. [2023-11-06 22:18:14,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755813953488372 [2023-11-06 22:18:14,153 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 409 transitions. [2023-11-06 22:18:14,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 409 transitions. [2023-11-06 22:18:14,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:14,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 409 transitions. [2023-11-06 22:18:14,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 204.5) internal successors, (409), 2 states have internal predecessors, (409), 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) [2023-11-06 22:18:14,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 430.0) internal successors, (1290), 3 states have internal predecessors, (1290), 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) [2023-11-06 22:18:14,179 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 430.0) internal successors, (1290), 3 states have internal predecessors, (1290), 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) [2023-11-06 22:18:14,181 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 409 transitions. [2023-11-06 22:18:14,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-11-06 22:18:14,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:14,188 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-11-06 22:18:14,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-06 22:18:14,195 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-11-06 22:18:14,196 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-11-06 22:18:14,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 201.0) internal successors, (402), 2 states have internal predecessors, (402), 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) [2023-11-06 22:18:14,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:14,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:18:14,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:14,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1951640248, now seen corresponding path program 1 times [2023-11-06 22:18:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152343058] [2023-11-06 22:18:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:14,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:14,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:14,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152343058] [2023-11-06 22:18:14,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152343058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:14,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:14,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:18:14,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054936272] [2023-11-06 22:18:14,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:14,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:14,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 430 [2023-11-06 22:18:14,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 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) [2023-11-06 22:18:14,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:14,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 430 [2023-11-06 22:18:14,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:14,798 INFO L124 PetriNetUnfolderBase]: 340/483 cut-off events. [2023-11-06 22:18:14,798 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 22:18:14,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 483 events. 340/483 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1473 event pairs, 48 based on Foata normal form. 10/324 useless extension candidates. Maximal degree in co-relation 976. Up to 390 conditions per place. [2023-11-06 22:18:14,804 INFO L140 encePairwiseOnDemand]: 425/430 looper letters, 31 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-06 22:18:14,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 37 transitions, 150 flow [2023-11-06 22:18:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:18:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-11-06 22:18:14,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2023-11-06 22:18:14,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-11-06 22:18:14,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-11-06 22:18:14,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:14,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-11-06 22:18:14,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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) [2023-11-06 22:18:14,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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) [2023-11-06 22:18:14,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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) [2023-11-06 22:18:14,827 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 3 states and 600 transitions. [2023-11-06 22:18:14,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 37 transitions, 150 flow [2023-11-06 22:18:14,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:18:14,831 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 81 flow [2023-11-06 22:18:14,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-11-06 22:18:14,840 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2023-11-06 22:18:14,840 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 81 flow [2023-11-06 22:18:14,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 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) [2023-11-06 22:18:14,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:14,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:14,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:18:14,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:14,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2039128898, now seen corresponding path program 2 times [2023-11-06 22:18:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:14,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371402565] [2023-11-06 22:18:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371402565] [2023-11-06 22:18:15,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371402565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:15,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674435889] [2023-11-06 22:18:15,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:15,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:15,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 430 [2023-11-06 22:18:15,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 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) [2023-11-06 22:18:15,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:15,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 430 [2023-11-06 22:18:15,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:15,574 INFO L124 PetriNetUnfolderBase]: 341/497 cut-off events. [2023-11-06 22:18:15,575 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-06 22:18:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1229 conditions, 497 events. 341/497 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1532 event pairs, 159 based on Foata normal form. 9/339 useless extension candidates. Maximal degree in co-relation 1224. Up to 475 conditions per place. [2023-11-06 22:18:15,580 INFO L140 encePairwiseOnDemand]: 424/430 looper letters, 25 selfloop transitions, 2 changer transitions 9/39 dead transitions. [2023-11-06 22:18:15,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 176 flow [2023-11-06 22:18:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 749 transitions. [2023-11-06 22:18:15,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43546511627906975 [2023-11-06 22:18:15,585 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 749 transitions. [2023-11-06 22:18:15,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 749 transitions. [2023-11-06 22:18:15,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:15,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 749 transitions. [2023-11-06 22:18:15,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 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) [2023-11-06 22:18:15,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:18:15,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:18:15,597 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 81 flow. Second operand 4 states and 749 transitions. [2023-11-06 22:18:15,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 176 flow [2023-11-06 22:18:15,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 39 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:15,599 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 96 flow [2023-11-06 22:18:15,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-06 22:18:15,600 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-11-06 22:18:15,601 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 96 flow [2023-11-06 22:18:15,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 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) [2023-11-06 22:18:15,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:15,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:18:15,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:15,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash -710274098, now seen corresponding path program 1 times [2023-11-06 22:18:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:15,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935101549] [2023-11-06 22:18:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:15,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:15,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935101549] [2023-11-06 22:18:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935101549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:15,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:15,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:15,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668002600] [2023-11-06 22:18:15,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:15,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:15,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:15,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 430 [2023-11-06 22:18:15,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 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) [2023-11-06 22:18:15,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:15,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 430 [2023-11-06 22:18:15,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:16,047 INFO L124 PetriNetUnfolderBase]: 387/576 cut-off events. [2023-11-06 22:18:16,048 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-11-06 22:18:16,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1597 conditions, 576 events. 387/576 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1992 event pairs, 187 based on Foata normal form. 14/404 useless extension candidates. Maximal degree in co-relation 1590. Up to 476 conditions per place. [2023-11-06 22:18:16,054 INFO L140 encePairwiseOnDemand]: 425/430 looper letters, 26 selfloop transitions, 2 changer transitions 12/43 dead transitions. [2023-11-06 22:18:16,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 212 flow [2023-11-06 22:18:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 751 transitions. [2023-11-06 22:18:16,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366279069767442 [2023-11-06 22:18:16,059 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 751 transitions. [2023-11-06 22:18:16,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 751 transitions. [2023-11-06 22:18:16,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:16,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 751 transitions. [2023-11-06 22:18:16,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 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) [2023-11-06 22:18:16,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:18:16,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:18:16,072 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 96 flow. Second operand 4 states and 751 transitions. [2023-11-06 22:18:16,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 212 flow [2023-11-06 22:18:16,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 208 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:16,079 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 108 flow [2023-11-06 22:18:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-06 22:18:16,081 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-11-06 22:18:16,082 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 108 flow [2023-11-06 22:18:16,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 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) [2023-11-06 22:18:16,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:16,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:18:16,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:16,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash 653680435, now seen corresponding path program 1 times [2023-11-06 22:18:16,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:16,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414957673] [2023-11-06 22:18:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:16,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:18:16,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414957673] [2023-11-06 22:18:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414957673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104474294] [2023-11-06 22:18:16,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:16,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:18:16,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:16,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:18:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:16,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 430 [2023-11-06 22:18:16,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 187.14285714285714) internal successors, (1310), 7 states have internal predecessors, (1310), 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) [2023-11-06 22:18:16,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:16,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 430 [2023-11-06 22:18:16,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:16,853 INFO L124 PetriNetUnfolderBase]: 499/751 cut-off events. [2023-11-06 22:18:16,853 INFO L125 PetriNetUnfolderBase]: For 245/263 co-relation queries the response was YES. [2023-11-06 22:18:16,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 751 events. 499/751 cut-off events. For 245/263 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2745 event pairs, 85 based on Foata normal form. 1/528 useless extension candidates. Maximal degree in co-relation 2094. Up to 302 conditions per place. [2023-11-06 22:18:16,862 INFO L140 encePairwiseOnDemand]: 423/430 looper letters, 65 selfloop transitions, 8 changer transitions 2/77 dead transitions. [2023-11-06 22:18:16,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 77 transitions, 414 flow [2023-11-06 22:18:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:18:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1172 transitions. [2023-11-06 22:18:16,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542635658914729 [2023-11-06 22:18:16,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1172 transitions. [2023-11-06 22:18:16,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1172 transitions. [2023-11-06 22:18:16,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:16,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1172 transitions. [2023-11-06 22:18:16,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 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) [2023-11-06 22:18:16,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-11-06 22:18:16,886 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-11-06 22:18:16,887 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 108 flow. Second operand 6 states and 1172 transitions. [2023-11-06 22:18:16,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 77 transitions, 414 flow [2023-11-06 22:18:16,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 77 transitions, 398 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:16,894 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 158 flow [2023-11-06 22:18:16,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-06 22:18:16,898 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2023-11-06 22:18:16,898 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 158 flow [2023-11-06 22:18:16,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.14285714285714) internal successors, (1310), 7 states have internal predecessors, (1310), 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) [2023-11-06 22:18:16,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:16,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:18:16,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:16,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1976392154, now seen corresponding path program 1 times [2023-11-06 22:18:16,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826419292] [2023-11-06 22:18:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:17,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:17,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826419292] [2023-11-06 22:18:17,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826419292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:17,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:17,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:18:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839971714] [2023-11-06 22:18:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:17,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:17,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 430 [2023-11-06 22:18:17,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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) [2023-11-06 22:18:17,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:17,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 430 [2023-11-06 22:18:17,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:17,208 INFO L124 PetriNetUnfolderBase]: 328/511 cut-off events. [2023-11-06 22:18:17,208 INFO L125 PetriNetUnfolderBase]: For 321/325 co-relation queries the response was YES. [2023-11-06 22:18:17,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 511 events. 328/511 cut-off events. For 321/325 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1657 event pairs, 92 based on Foata normal form. 8/423 useless extension candidates. Maximal degree in co-relation 1607. Up to 496 conditions per place. [2023-11-06 22:18:17,214 INFO L140 encePairwiseOnDemand]: 426/430 looper letters, 34 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-11-06 22:18:17,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 233 flow [2023-11-06 22:18:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:18:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-11-06 22:18:17,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462015503875969 [2023-11-06 22:18:17,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-11-06 22:18:17,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-11-06 22:18:17,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:17,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-11-06 22:18:17,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2023-11-06 22:18:17,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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) [2023-11-06 22:18:17,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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) [2023-11-06 22:18:17,230 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 158 flow. Second operand 3 states and 596 transitions. [2023-11-06 22:18:17,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 233 flow [2023-11-06 22:18:17,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 221 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:17,234 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 146 flow [2023-11-06 22:18:17,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-11-06 22:18:17,237 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2023-11-06 22:18:17,238 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 146 flow [2023-11-06 22:18:17,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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) [2023-11-06 22:18:17,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:17,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:17,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:18:17,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:17,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash -62929088, now seen corresponding path program 1 times [2023-11-06 22:18:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721863911] [2023-11-06 22:18:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:17,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:17,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721863911] [2023-11-06 22:18:17,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721863911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:17,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6263711] [2023-11-06 22:18:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:17,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:17,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:17,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:17,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:18:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:17,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:18:17,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:17,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:17,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6263711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:17,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:17,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:18:17,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942492784] [2023-11-06 22:18:17,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:17,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:18:17,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:18:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:18:18,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 430 [2023-11-06 22:18:18,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 146 flow. Second operand has 12 states, 12 states have (on average 174.66666666666666) internal successors, (2096), 12 states have internal predecessors, (2096), 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) [2023-11-06 22:18:18,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:18,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 430 [2023-11-06 22:18:18,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:18,603 INFO L124 PetriNetUnfolderBase]: 507/830 cut-off events. [2023-11-06 22:18:18,604 INFO L125 PetriNetUnfolderBase]: For 728/737 co-relation queries the response was YES. [2023-11-06 22:18:18,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 830 events. 507/830 cut-off events. For 728/737 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3364 event pairs, 214 based on Foata normal form. 49/743 useless extension candidates. Maximal degree in co-relation 2624. Up to 508 conditions per place. [2023-11-06 22:18:18,613 INFO L140 encePairwiseOnDemand]: 425/430 looper letters, 58 selfloop transitions, 5 changer transitions 2/68 dead transitions. [2023-11-06 22:18:18,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 401 flow [2023-11-06 22:18:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:18:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1087 transitions. [2023-11-06 22:18:18,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42131782945736435 [2023-11-06 22:18:18,620 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1087 transitions. [2023-11-06 22:18:18,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1087 transitions. [2023-11-06 22:18:18,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:18,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1087 transitions. [2023-11-06 22:18:18,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 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) [2023-11-06 22:18:18,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-11-06 22:18:18,633 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-11-06 22:18:18,633 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 146 flow. Second operand 6 states and 1087 transitions. [2023-11-06 22:18:18,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 401 flow [2023-11-06 22:18:18,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:18,638 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 185 flow [2023-11-06 22:18:18,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-11-06 22:18:18,639 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-11-06 22:18:18,640 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 185 flow [2023-11-06 22:18:18,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 174.66666666666666) internal successors, (2096), 12 states have internal predecessors, (2096), 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) [2023-11-06 22:18:18,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:18,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:18,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:18,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:18,860 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:18,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash -972872638, now seen corresponding path program 2 times [2023-11-06 22:18:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:18,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804715460] [2023-11-06 22:18:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:18,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:18:19,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:19,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804715460] [2023-11-06 22:18:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804715460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:19,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:19,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:19,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988052974] [2023-11-06 22:18:19,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:19,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:19,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:19,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:19,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:19,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 430 [2023-11-06 22:18:19,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 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) [2023-11-06 22:18:19,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:19,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 430 [2023-11-06 22:18:19,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:19,492 INFO L124 PetriNetUnfolderBase]: 907/1513 cut-off events. [2023-11-06 22:18:19,492 INFO L125 PetriNetUnfolderBase]: For 1406/1414 co-relation queries the response was YES. [2023-11-06 22:18:19,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4919 conditions, 1513 events. 907/1513 cut-off events. For 1406/1414 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7386 event pairs, 168 based on Foata normal form. 76/1328 useless extension candidates. Maximal degree in co-relation 4904. Up to 665 conditions per place. [2023-11-06 22:18:19,511 INFO L140 encePairwiseOnDemand]: 425/430 looper letters, 56 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2023-11-06 22:18:19,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 450 flow [2023-11-06 22:18:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 808 transitions. [2023-11-06 22:18:19,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2023-11-06 22:18:19,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 808 transitions. [2023-11-06 22:18:19,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 808 transitions. [2023-11-06 22:18:19,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:19,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 808 transitions. [2023-11-06 22:18:19,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:19,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:18:19,529 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:18:19,529 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 185 flow. Second operand 4 states and 808 transitions. [2023-11-06 22:18:19,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 450 flow [2023-11-06 22:18:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 427 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:19,536 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 266 flow [2023-11-06 22:18:19,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-06 22:18:19,539 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2023-11-06 22:18:19,539 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 266 flow [2023-11-06 22:18:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 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) [2023-11-06 22:18:19,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:19,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:18:19,541 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:19,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash 697863228, now seen corresponding path program 2 times [2023-11-06 22:18:19,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086060642] [2023-11-06 22:18:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086060642] [2023-11-06 22:18:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086060642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:20,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219670334] [2023-11-06 22:18:20,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:20,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:20,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:20,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:18:21,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:21,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:21,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:18:21,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:21,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:18:21,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-06 22:18:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:21,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:21,782 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:21,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-06 22:18:21,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-06 22:18:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:22,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219670334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:22,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:22,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-06 22:18:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670322262] [2023-11-06 22:18:22,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:22,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:18:22,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:22,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:18:22,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:18:24,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 430 [2023-11-06 22:18:24,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 266 flow. Second operand has 24 states, 24 states have (on average 156.375) internal successors, (3753), 24 states have internal predecessors, (3753), 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) [2023-11-06 22:18:24,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:24,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 430 [2023-11-06 22:18:24,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:29,582 INFO L124 PetriNetUnfolderBase]: 4586/7490 cut-off events. [2023-11-06 22:18:29,582 INFO L125 PetriNetUnfolderBase]: For 14015/14049 co-relation queries the response was YES. [2023-11-06 22:18:29,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29076 conditions, 7490 events. 4586/7490 cut-off events. For 14015/14049 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 49144 event pairs, 499 based on Foata normal form. 34/6221 useless extension candidates. Maximal degree in co-relation 29060. Up to 3206 conditions per place. [2023-11-06 22:18:29,684 INFO L140 encePairwiseOnDemand]: 418/430 looper letters, 342 selfloop transitions, 119 changer transitions 14/477 dead transitions. [2023-11-06 22:18:29,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 477 transitions, 3560 flow [2023-11-06 22:18:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:18:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 22:18:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 6373 transitions. [2023-11-06 22:18:29,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800238521168754 [2023-11-06 22:18:29,717 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 6373 transitions. [2023-11-06 22:18:29,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 6373 transitions. [2023-11-06 22:18:29,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:29,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 6373 transitions. [2023-11-06 22:18:29,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 163.4102564102564) internal successors, (6373), 39 states have internal predecessors, (6373), 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) [2023-11-06 22:18:29,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 430.0) internal successors, (17200), 40 states have internal predecessors, (17200), 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) [2023-11-06 22:18:29,798 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 430.0) internal successors, (17200), 40 states have internal predecessors, (17200), 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) [2023-11-06 22:18:29,807 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 266 flow. Second operand 39 states and 6373 transitions. [2023-11-06 22:18:29,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 477 transitions, 3560 flow [2023-11-06 22:18:29,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 477 transitions, 3412 flow, removed 74 selfloop flow, removed 0 redundant places. [2023-11-06 22:18:29,832 INFO L231 Difference]: Finished difference. Result has 103 places, 188 transitions, 1537 flow [2023-11-06 22:18:29,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1537, PETRI_PLACES=103, PETRI_TRANSITIONS=188} [2023-11-06 22:18:29,833 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 71 predicate places. [2023-11-06 22:18:29,834 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 188 transitions, 1537 flow [2023-11-06 22:18:29,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 156.375) internal successors, (3753), 24 states have internal predecessors, (3753), 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) [2023-11-06 22:18:29,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:29,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:29,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:30,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:30,043 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:30,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash -525116224, now seen corresponding path program 3 times [2023-11-06 22:18:30,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:30,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504826715] [2023-11-06 22:18:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:31,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:31,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504826715] [2023-11-06 22:18:31,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504826715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:31,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991369667] [2023-11-06 22:18:31,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:31,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:31,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:31,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:31,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:18:31,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:18:31,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:31,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:18:31,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:31,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:31,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:18:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:31,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:31,669 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_256 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_256) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-06 22:18:31,687 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:31,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-06 22:18:31,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-06 22:18:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2023-11-06 22:18:31,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991369667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:31,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:31,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 18 [2023-11-06 22:18:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524922800] [2023-11-06 22:18:31,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:31,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:18:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:18:31,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=266, Unknown=1, NotChecked=32, Total=342 [2023-11-06 22:18:32,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 430 [2023-11-06 22:18:32,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 188 transitions, 1537 flow. Second operand has 19 states, 19 states have (on average 139.10526315789474) internal successors, (2643), 19 states have internal predecessors, (2643), 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) [2023-11-06 22:18:32,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:32,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 430 [2023-11-06 22:18:32,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:35,238 INFO L124 PetriNetUnfolderBase]: 5119/8327 cut-off events. [2023-11-06 22:18:35,238 INFO L125 PetriNetUnfolderBase]: For 30165/30174 co-relation queries the response was YES. [2023-11-06 22:18:35,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37853 conditions, 8327 events. 5119/8327 cut-off events. For 30165/30174 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 54185 event pairs, 1241 based on Foata normal form. 47/7572 useless extension candidates. Maximal degree in co-relation 37822. Up to 5419 conditions per place. [2023-11-06 22:18:35,359 INFO L140 encePairwiseOnDemand]: 421/430 looper letters, 247 selfloop transitions, 84 changer transitions 0/333 dead transitions. [2023-11-06 22:18:35,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 333 transitions, 3172 flow [2023-11-06 22:18:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:18:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:18:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1870 transitions. [2023-11-06 22:18:35,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334525939177102 [2023-11-06 22:18:35,367 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1870 transitions. [2023-11-06 22:18:35,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1870 transitions. [2023-11-06 22:18:35,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:35,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1870 transitions. [2023-11-06 22:18:35,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.84615384615384) internal successors, (1870), 13 states have internal predecessors, (1870), 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) [2023-11-06 22:18:35,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 430.0) internal successors, (6020), 14 states have internal predecessors, (6020), 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) [2023-11-06 22:18:35,388 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 430.0) internal successors, (6020), 14 states have internal predecessors, (6020), 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) [2023-11-06 22:18:35,388 INFO L175 Difference]: Start difference. First operand has 103 places, 188 transitions, 1537 flow. Second operand 13 states and 1870 transitions. [2023-11-06 22:18:35,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 333 transitions, 3172 flow [2023-11-06 22:18:35,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 333 transitions, 2566 flow, removed 298 selfloop flow, removed 5 redundant places. [2023-11-06 22:18:35,704 INFO L231 Difference]: Finished difference. Result has 115 places, 221 transitions, 1734 flow [2023-11-06 22:18:35,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1734, PETRI_PLACES=115, PETRI_TRANSITIONS=221} [2023-11-06 22:18:35,705 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 83 predicate places. [2023-11-06 22:18:35,705 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 221 transitions, 1734 flow [2023-11-06 22:18:35,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 139.10526315789474) internal successors, (2643), 19 states have internal predecessors, (2643), 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) [2023-11-06 22:18:35,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:35,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:35,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:35,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:18:35,914 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:18:35,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash 477344760, now seen corresponding path program 4 times [2023-11-06 22:18:35,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:35,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142919543] [2023-11-06 22:18:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:35,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142919543] [2023-11-06 22:18:37,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142919543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:37,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661453999] [2023-11-06 22:18:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:18:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:37,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:37,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:37,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:18:37,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:18:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:37,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:18:37,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:37,331 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-06 22:18:37,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:18:37,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:18:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:37,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:37,814 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_305 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_305) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-06 22:18:37,970 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:37,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-11-06 22:18:37,984 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-11-06 22:18:37,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-11-06 22:18:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:38,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661453999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:38,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:38,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-11-06 22:18:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129524868] [2023-11-06 22:18:38,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:38,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:18:38,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:38,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:18:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=554, Unknown=7, NotChecked=48, Total=702 [2023-11-06 22:18:38,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 430 [2023-11-06 22:18:38,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 221 transitions, 1734 flow. Second operand has 27 states, 27 states have (on average 135.0) internal successors, (3645), 27 states have internal predecessors, (3645), 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) [2023-11-06 22:18:38,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:38,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 430 [2023-11-06 22:18:38,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:42,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:44,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:46,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:48,179 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_304 (Array Int Int)) (v_ArrVal_305 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_304) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_305) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) (not (= |c_thread2Thread1of1ForFork0_~j~0#1| 0))) is different from false [2023-11-06 22:18:52,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:54,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:56,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:18:59,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:19:00,051 INFO L124 PetriNetUnfolderBase]: 10283/16310 cut-off events. [2023-11-06 22:19:00,051 INFO L125 PetriNetUnfolderBase]: For 65660/65671 co-relation queries the response was YES. [2023-11-06 22:19:00,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71845 conditions, 16310 events. 10283/16310 cut-off events. For 65660/65671 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 114438 event pairs, 1108 based on Foata normal form. 275/15305 useless extension candidates. Maximal degree in co-relation 71812. Up to 4776 conditions per place. [2023-11-06 22:19:00,304 INFO L140 encePairwiseOnDemand]: 412/430 looper letters, 404 selfloop transitions, 250 changer transitions 1/657 dead transitions. [2023-11-06 22:19:00,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 657 transitions, 6137 flow [2023-11-06 22:19:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:19:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:19:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4111 transitions. [2023-11-06 22:19:00,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296712109061748 [2023-11-06 22:19:00,321 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4111 transitions. [2023-11-06 22:19:00,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4111 transitions. [2023-11-06 22:19:00,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:00,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4111 transitions. [2023-11-06 22:19:00,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 141.75862068965517) internal successors, (4111), 29 states have internal predecessors, (4111), 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) [2023-11-06 22:19:00,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 430.0) internal successors, (12900), 30 states have internal predecessors, (12900), 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) [2023-11-06 22:19:00,364 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 430.0) internal successors, (12900), 30 states have internal predecessors, (12900), 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) [2023-11-06 22:19:00,364 INFO L175 Difference]: Start difference. First operand has 115 places, 221 transitions, 1734 flow. Second operand 29 states and 4111 transitions. [2023-11-06 22:19:00,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 657 transitions, 6137 flow [2023-11-06 22:19:01,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 657 transitions, 6092 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-06 22:19:01,641 INFO L231 Difference]: Finished difference. Result has 151 places, 411 transitions, 4380 flow [2023-11-06 22:19:01,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4380, PETRI_PLACES=151, PETRI_TRANSITIONS=411} [2023-11-06 22:19:01,643 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 119 predicate places. [2023-11-06 22:19:01,643 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 411 transitions, 4380 flow [2023-11-06 22:19:01,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 135.0) internal successors, (3645), 27 states have internal predecessors, (3645), 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) [2023-11-06 22:19:01,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:01,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:01,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:19:01,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:01,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:01,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash 230388586, now seen corresponding path program 5 times [2023-11-06 22:19:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:01,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162004789] [2023-11-06 22:19:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:19:03,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162004789] [2023-11-06 22:19:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162004789] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377209072] [2023-11-06 22:19:03,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:03,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:03,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:03,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:03,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:19:03,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:19:03,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:03,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:19:03,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:03,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:03,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:19:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:19:03,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:19:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:19:04,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:04,118 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_355 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_355) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-06 22:19:04,141 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_355 (Array Int Int)) (v_ArrVal_354 (Array Int Int))) (not (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_354) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_355) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-11-06 22:19:04,158 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:19:04,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-11-06 22:19:04,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-11-06 22:19:04,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-11-06 22:19:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-11-06 22:19:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377209072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:04,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:04,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2023-11-06 22:19:04,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937245416] [2023-11-06 22:19:04,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:04,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:19:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:19:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=403, Unknown=2, NotChecked=82, Total=552 [2023-11-06 22:19:04,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 430 [2023-11-06 22:19:04,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 411 transitions, 4380 flow. Second operand has 24 states, 24 states have (on average 135.375) internal successors, (3249), 24 states have internal predecessors, (3249), 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) [2023-11-06 22:19:04,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:04,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 430 [2023-11-06 22:19:04,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:09,402 INFO L124 PetriNetUnfolderBase]: 10391/16502 cut-off events. [2023-11-06 22:19:09,402 INFO L125 PetriNetUnfolderBase]: For 105506/105519 co-relation queries the response was YES. [2023-11-06 22:19:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93051 conditions, 16502 events. 10391/16502 cut-off events. For 105506/105519 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 115528 event pairs, 2185 based on Foata normal form. 23/15574 useless extension candidates. Maximal degree in co-relation 93006. Up to 9651 conditions per place. [2023-11-06 22:19:09,612 INFO L140 encePairwiseOnDemand]: 422/430 looper letters, 307 selfloop transitions, 208 changer transitions 1/518 dead transitions. [2023-11-06 22:19:09,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 518 transitions, 6218 flow [2023-11-06 22:19:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:19:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:19:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1966 transitions. [2023-11-06 22:19:09,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.326578073089701 [2023-11-06 22:19:09,617 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1966 transitions. [2023-11-06 22:19:09,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1966 transitions. [2023-11-06 22:19:09,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:09,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1966 transitions. [2023-11-06 22:19:09,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 140.42857142857142) internal successors, (1966), 14 states have internal predecessors, (1966), 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) [2023-11-06 22:19:09,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 430.0) internal successors, (6450), 15 states have internal predecessors, (6450), 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) [2023-11-06 22:19:09,632 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 430.0) internal successors, (6450), 15 states have internal predecessors, (6450), 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) [2023-11-06 22:19:09,632 INFO L175 Difference]: Start difference. First operand has 151 places, 411 transitions, 4380 flow. Second operand 14 states and 1966 transitions. [2023-11-06 22:19:09,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 518 transitions, 6218 flow [2023-11-06 22:19:12,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 518 transitions, 6109 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-11-06 22:19:12,422 INFO L231 Difference]: Finished difference. Result has 153 places, 426 transitions, 5038 flow [2023-11-06 22:19:12,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5038, PETRI_PLACES=153, PETRI_TRANSITIONS=426} [2023-11-06 22:19:12,423 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 121 predicate places. [2023-11-06 22:19:12,423 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 426 transitions, 5038 flow [2023-11-06 22:19:12,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 135.375) internal successors, (3249), 24 states have internal predecessors, (3249), 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) [2023-11-06 22:19:12,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:12,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:12,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:12,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:19:12,631 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:12,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1497837490, now seen corresponding path program 1 times [2023-11-06 22:19:12,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:12,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920380800] [2023-11-06 22:19:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:12,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:12,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920380800] [2023-11-06 22:19:12,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920380800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:12,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:12,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:19:12,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468397789] [2023-11-06 22:19:12,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:19:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:19:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:19:12,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 430 [2023-11-06 22:19:12,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 426 transitions, 5038 flow. Second operand has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 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) [2023-11-06 22:19:12,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:12,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 430 [2023-11-06 22:19:12,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:17,890 INFO L124 PetriNetUnfolderBase]: 11880/18742 cut-off events. [2023-11-06 22:19:17,891 INFO L125 PetriNetUnfolderBase]: For 146263/146311 co-relation queries the response was YES. [2023-11-06 22:19:18,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111855 conditions, 18742 events. 11880/18742 cut-off events. For 146263/146311 co-relation queries the response was YES. Maximal size of possible extension queue 1089. Compared 132014 event pairs, 2903 based on Foata normal form. 301/17846 useless extension candidates. Maximal degree in co-relation 111809. Up to 14538 conditions per place. [2023-11-06 22:19:18,300 INFO L140 encePairwiseOnDemand]: 426/430 looper letters, 475 selfloop transitions, 108 changer transitions 20/606 dead transitions. [2023-11-06 22:19:18,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 606 transitions, 8205 flow [2023-11-06 22:19:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:19:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:19:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 812 transitions. [2023-11-06 22:19:18,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2023-11-06 22:19:18,303 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 812 transitions. [2023-11-06 22:19:18,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 812 transitions. [2023-11-06 22:19:18,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:18,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 812 transitions. [2023-11-06 22:19:18,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 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) [2023-11-06 22:19:18,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:19:18,315 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 430.0) internal successors, (2150), 5 states have internal predecessors, (2150), 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) [2023-11-06 22:19:18,315 INFO L175 Difference]: Start difference. First operand has 153 places, 426 transitions, 5038 flow. Second operand 4 states and 812 transitions. [2023-11-06 22:19:18,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 606 transitions, 8205 flow [2023-11-06 22:19:20,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 606 transitions, 7940 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-06 22:19:20,609 INFO L231 Difference]: Finished difference. Result has 145 places, 481 transitions, 5898 flow [2023-11-06 22:19:20,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=4841, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5898, PETRI_PLACES=145, PETRI_TRANSITIONS=481} [2023-11-06 22:19:20,610 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 113 predicate places. [2023-11-06 22:19:20,610 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 481 transitions, 5898 flow [2023-11-06 22:19:20,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 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) [2023-11-06 22:19:20,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:20,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:20,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:19:20,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:20,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 712538784, now seen corresponding path program 1 times [2023-11-06 22:19:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:20,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467923561] [2023-11-06 22:19:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:19:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467923561] [2023-11-06 22:19:20,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467923561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103834935] [2023-11-06 22:19:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:20,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:20,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:20,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:20,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:19:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:21,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:19:21,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:19:21,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:19:21,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103834935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:21,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:21,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:19:21,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812375192] [2023-11-06 22:19:21,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:21,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:19:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:19:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:19:21,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 430 [2023-11-06 22:19:21,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 481 transitions, 5898 flow. Second operand has 12 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) [2023-11-06 22:19:21,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:21,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 430 [2023-11-06 22:19:21,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:28,034 INFO L124 PetriNetUnfolderBase]: 15057/23964 cut-off events. [2023-11-06 22:19:28,035 INFO L125 PetriNetUnfolderBase]: For 212227/212244 co-relation queries the response was YES. [2023-11-06 22:19:28,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145390 conditions, 23964 events. 15057/23964 cut-off events. For 212227/212244 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 176832 event pairs, 5406 based on Foata normal form. 1076/23488 useless extension candidates. Maximal degree in co-relation 145349. Up to 18386 conditions per place. [2023-11-06 22:19:28,354 INFO L140 encePairwiseOnDemand]: 425/430 looper letters, 472 selfloop transitions, 7 changer transitions 324/806 dead transitions. [2023-11-06 22:19:28,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 806 transitions, 11181 flow [2023-11-06 22:19:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:19:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:19:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1083 transitions. [2023-11-06 22:19:28,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197674418604651 [2023-11-06 22:19:28,357 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1083 transitions. [2023-11-06 22:19:28,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1083 transitions. [2023-11-06 22:19:28,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:28,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1083 transitions. [2023-11-06 22:19:28,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.5) internal successors, (1083), 6 states have internal predecessors, (1083), 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) [2023-11-06 22:19:28,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-11-06 22:19:28,364 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-11-06 22:19:28,364 INFO L175 Difference]: Start difference. First operand has 145 places, 481 transitions, 5898 flow. Second operand 6 states and 1083 transitions. [2023-11-06 22:19:28,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 806 transitions, 11181 flow [2023-11-06 22:19:33,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 806 transitions, 10806 flow, removed 83 selfloop flow, removed 5 redundant places. [2023-11-06 22:19:33,243 INFO L231 Difference]: Finished difference. Result has 141 places, 482 transitions, 5871 flow [2023-11-06 22:19:33,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=5667, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5871, PETRI_PLACES=141, PETRI_TRANSITIONS=482} [2023-11-06 22:19:33,244 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 109 predicate places. [2023-11-06 22:19:33,245 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 482 transitions, 5871 flow [2023-11-06 22:19:33,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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) [2023-11-06 22:19:33,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:33,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:33,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:33,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:19:33,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:19:33,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1702779323, now seen corresponding path program 2 times [2023-11-06 22:19:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:33,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993994247] [2023-11-06 22:19:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:19:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993994247] [2023-11-06 22:19:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993994247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518241290] [2023-11-06 22:19:34,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:34,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:34,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:34,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:34,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:19:34,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:34,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:19:34,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:35,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:36,048 INFO L322 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2023-11-06 22:19:36,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 82 [2023-11-06 22:19:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:19:36,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518241290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:36,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:36,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2023-11-06 22:19:36,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848217098] [2023-11-06 22:19:36,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:36,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:19:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:19:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:19:39,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 430 [2023-11-06 22:19:39,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 482 transitions, 5871 flow. Second operand has 35 states, 35 states have (on average 152.05714285714285) internal successors, (5322), 35 states have internal predecessors, (5322), 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) [2023-11-06 22:19:39,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:39,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 430 [2023-11-06 22:19:39,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:46,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:19:54,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:19:56,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:20:04,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:20:19,868 INFO L124 PetriNetUnfolderBase]: 47757/75295 cut-off events. [2023-11-06 22:20:19,868 INFO L125 PetriNetUnfolderBase]: For 625247/625267 co-relation queries the response was YES. [2023-11-06 22:20:20,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472278 conditions, 75295 events. 47757/75295 cut-off events. For 625247/625267 co-relation queries the response was YES. Maximal size of possible extension queue 3581. Compared 628079 event pairs, 2403 based on Foata normal form. 2648/72222 useless extension candidates. Maximal degree in co-relation 472237. Up to 33997 conditions per place. [2023-11-06 22:20:20,830 INFO L140 encePairwiseOnDemand]: 416/430 looper letters, 1656 selfloop transitions, 2076 changer transitions 12/3746 dead transitions. [2023-11-06 22:20:20,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 3746 transitions, 51197 flow [2023-11-06 22:20:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-06 22:20:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-11-06 22:20:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 14616 transitions. [2023-11-06 22:20:20,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36946410515672395 [2023-11-06 22:20:20,852 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 14616 transitions. [2023-11-06 22:20:20,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 14616 transitions. [2023-11-06 22:20:20,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:20,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 14616 transitions. [2023-11-06 22:20:20,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 158.8695652173913) internal successors, (14616), 92 states have internal predecessors, (14616), 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) [2023-11-06 22:20:20,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 430.0) internal successors, (39990), 93 states have internal predecessors, (39990), 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) [2023-11-06 22:20:20,922 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 430.0) internal successors, (39990), 93 states have internal predecessors, (39990), 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) [2023-11-06 22:20:20,922 INFO L175 Difference]: Start difference. First operand has 141 places, 482 transitions, 5871 flow. Second operand 92 states and 14616 transitions. [2023-11-06 22:20:20,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 3746 transitions, 51197 flow [2023-11-06 22:21:19,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 3746 transitions, 50036 flow, removed 572 selfloop flow, removed 4 redundant places. [2023-11-06 22:21:19,207 INFO L231 Difference]: Finished difference. Result has 282 places, 2729 transitions, 43340 flow [2023-11-06 22:21:19,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=43340, PETRI_PLACES=282, PETRI_TRANSITIONS=2729} [2023-11-06 22:21:19,208 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 250 predicate places. [2023-11-06 22:21:19,208 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 2729 transitions, 43340 flow [2023-11-06 22:21:19,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 152.05714285714285) internal successors, (5322), 35 states have internal predecessors, (5322), 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) [2023-11-06 22:21:19,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:19,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:19,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:21:19,412 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:21:19,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash 981823437, now seen corresponding path program 3 times [2023-11-06 22:21:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:19,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701524684] [2023-11-06 22:21:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:20,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:20,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701524684] [2023-11-06 22:21:20,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701524684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:20,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061163223] [2023-11-06 22:21:20,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:21:20,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:20,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:20,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:20,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ed078df-a0d8-4572-ab37-3cbe493d84ed/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:21:20,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:21:20,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:20,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:21:20,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:20,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:20,638 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:21:20,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-06 22:21:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:20,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061163223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:20,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-06 22:21:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921816068] [2023-11-06 22:21:20,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:20,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:21:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:21:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:21:21,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 430 [2023-11-06 22:21:21,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 2729 transitions, 43340 flow. Second operand has 21 states, 21 states have (on average 164.1904761904762) internal successors, (3448), 21 states have internal predecessors, (3448), 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) [2023-11-06 22:21:21,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:21,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 430 [2023-11-06 22:21:21,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand