./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/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_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/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_c32cce8b-c556-4347-9f96-55a77fd2f50f/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 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:55:38,597 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:55:38,717 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:55:38,732 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:55:38,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:55:38,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:55:38,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:55:38,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:55:38,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:55:38,788 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:55:38,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:55:38,789 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:55:38,790 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:55:38,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:55:38,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:55:38,792 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:55:38,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:55:38,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:55:38,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:55:38,794 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:55:38,794 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:55:38,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:55:38,795 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:55:38,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:55:38,796 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:55:38,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:55:38,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:55:38,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:55:38,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:55:38,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:55:38,800 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:55:38,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:55:38,801 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:55:38,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:55:38,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:55:38,801 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:55:38,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:55:38,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:55:38,802 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:55:38,802 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_c32cce8b-c556-4347-9f96-55a77fd2f50f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2023-11-06 22:55:39,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:55:39,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:55:39,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:55:39,198 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:55:39,199 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:55:39,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2023-11-06 22:55:42,457 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:55:42,675 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:55:42,676 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2023-11-06 22:55:42,689 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/data/5710eec42/33302862255b499a9c3756131ca1548b/FLAGa73cee969 [2023-11-06 22:55:42,704 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/data/5710eec42/33302862255b499a9c3756131ca1548b [2023-11-06 22:55:42,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:55:42,714 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:55:42,716 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:55:42,716 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:55:42,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:55:42,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:42" (1/1) ... [2023-11-06 22:55:42,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42713151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:42, skipping insertion in model container [2023-11-06 22:55:42,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:42" (1/1) ... [2023-11-06 22:55:42,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:55:42,972 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_c32cce8b-c556-4347-9f96-55a77fd2f50f/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2023-11-06 22:55:42,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:55:42,994 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:55:43,037 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_c32cce8b-c556-4347-9f96-55a77fd2f50f/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2023-11-06 22:55:43,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:55:43,070 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:55:43,071 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:55:43,078 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:55:43,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43 WrapperNode [2023-11-06 22:55:43,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:55:43,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:55:43,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:55:43,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:55:43,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,140 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 360 [2023-11-06 22:55:43,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:55:43,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:55:43,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:55:43,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:55:43,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,160 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,184 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:55:43,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:55:43,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:55:43,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:55:43,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (1/1) ... [2023-11-06 22:55:43,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:55:43,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:43,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:55:43,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:55:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:55:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:55:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:55:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:55:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:55:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:55:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:55:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:55:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:55:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:55:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:55:43,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:55:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:55:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:55:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:55:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:55:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:55:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:55:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:55:43,287 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 22:55:43,406 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:55:43,408 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:55:44,050 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:55:44,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:55:44,334 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-06 22:55:44,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:44 BoogieIcfgContainer [2023-11-06 22:55:44,338 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:55:44,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:55:44,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:55:44,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:55:44,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:42" (1/3) ... [2023-11-06 22:55:44,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa184e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:44, skipping insertion in model container [2023-11-06 22:55:44,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:43" (2/3) ... [2023-11-06 22:55:44,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa184e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:44, skipping insertion in model container [2023-11-06 22:55:44,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:44" (3/3) ... [2023-11-06 22:55:44,350 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2023-11-06 22:55:44,360 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:55:44,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:55:44,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:55:44,372 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:55:44,492 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:55:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 274 transitions, 576 flow [2023-11-06 22:55:44,695 INFO L124 PetriNetUnfolderBase]: 22/270 cut-off events. [2023-11-06 22:55:44,695 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:55:44,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 270 events. 22/270 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 137 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-11-06 22:55:44,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 274 transitions, 576 flow [2023-11-06 22:55:44,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 257 transitions, 538 flow [2023-11-06 22:55:44,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:55:44,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 257 transitions, 538 flow [2023-11-06 22:55:44,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 257 transitions, 538 flow [2023-11-06 22:55:44,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 257 transitions, 538 flow [2023-11-06 22:55:44,825 INFO L124 PetriNetUnfolderBase]: 22/257 cut-off events. [2023-11-06 22:55:44,825 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:55:44,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 257 events. 22/257 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 136 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 231. Up to 2 conditions per place. [2023-11-06 22:55:44,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-11-06 22:55:56,042 INFO L134 LiptonReduction]: Checked pairs total: 3719 [2023-11-06 22:55:56,043 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-11-06 22:55:56,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:55:56,065 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;@145c07bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:55:56,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:55:56,075 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:55:56,076 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2023-11-06 22:55:56,076 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:55:56,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:56,077 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, 1, 1, 1] [2023-11-06 22:55:56,078 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 2 more)] === [2023-11-06 22:55:56,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1885631989, now seen corresponding path program 1 times [2023-11-06 22:55:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790801160] [2023-11-06 22:55:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:56,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:56,602 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 22:55:56,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:56,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790801160] [2023-11-06 22:55:56,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790801160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:56,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:56,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:55:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733051102] [2023-11-06 22:55:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:56,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:55:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:55:56,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:55:56,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 532 [2023-11-06 22:55:56,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 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 22:55:56,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:56,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 532 [2023-11-06 22:55:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:57,376 INFO L124 PetriNetUnfolderBase]: 2607/3584 cut-off events. [2023-11-06 22:55:57,377 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-06 22:55:57,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7119 conditions, 3584 events. 2607/3584 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16021 event pairs, 498 based on Foata normal form. 1/2317 useless extension candidates. Maximal degree in co-relation 5886. Up to 2275 conditions per place. [2023-11-06 22:55:57,452 INFO L140 encePairwiseOnDemand]: 528/532 looper letters, 49 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-11-06 22:55:57,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 263 flow [2023-11-06 22:55:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:55:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:55:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 783 transitions. [2023-11-06 22:55:57,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906015037593985 [2023-11-06 22:55:57,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 783 transitions. [2023-11-06 22:55:57,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 783 transitions. [2023-11-06 22:55:57,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:57,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 783 transitions. [2023-11-06 22:55:57,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 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 22:55:57,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 22:55:57,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 22:55:57,511 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 102 flow. Second operand 3 states and 783 transitions. [2023-11-06 22:55:57,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 263 flow [2023-11-06 22:55:57,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 237 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:55:57,527 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 105 flow [2023-11-06 22:55:57,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2023-11-06 22:55:57,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-11-06 22:55:57,535 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 105 flow [2023-11-06 22:55:57,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 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 22:55:57,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:57,536 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, 1, 1, 1, 1, 1] [2023-11-06 22:55:57,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:55:57,537 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 2 more)] === [2023-11-06 22:55:57,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:57,539 INFO L85 PathProgramCache]: Analyzing trace with hash 305757054, now seen corresponding path program 1 times [2023-11-06 22:55:57,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:57,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521662438] [2023-11-06 22:55:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:57,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:57,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:57,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521662438] [2023-11-06 22:55:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521662438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:57,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:55:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307134087] [2023-11-06 22:55:57,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:57,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:55:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:55:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:55:57,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 532 [2023-11-06 22:55:57,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 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 22:55:57,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:57,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 532 [2023-11-06 22:55:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:58,559 INFO L124 PetriNetUnfolderBase]: 2710/3667 cut-off events. [2023-11-06 22:55:58,560 INFO L125 PetriNetUnfolderBase]: For 718/718 co-relation queries the response was YES. [2023-11-06 22:55:58,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8148 conditions, 3667 events. 2710/3667 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16529 event pairs, 624 based on Foata normal form. 114/3140 useless extension candidates. Maximal degree in co-relation 2697. Up to 2597 conditions per place. [2023-11-06 22:55:58,595 INFO L140 encePairwiseOnDemand]: 529/532 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-06 22:55:58,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 285 flow [2023-11-06 22:55:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:55:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:55:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 777 transitions. [2023-11-06 22:55:58,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2023-11-06 22:55:58,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 777 transitions. [2023-11-06 22:55:58,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 777 transitions. [2023-11-06 22:55:58,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:58,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 777 transitions. [2023-11-06 22:55:58,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 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 22:55:58,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 22:55:58,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 22:55:58,614 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 105 flow. Second operand 3 states and 777 transitions. [2023-11-06 22:55:58,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 285 flow [2023-11-06 22:55:58,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:58,625 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 116 flow [2023-11-06 22:55:58,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-11-06 22:55:58,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-11-06 22:55:58,626 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 116 flow [2023-11-06 22:55:58,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 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 22:55:58,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:58,627 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, 1, 1, 1, 1, 1] [2023-11-06 22:55:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:55:58,628 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 2 more)] === [2023-11-06 22:55:58,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash -80904913, now seen corresponding path program 1 times [2023-11-06 22:55:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:58,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424011389] [2023-11-06 22:55:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:58,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:58,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424011389] [2023-11-06 22:55:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424011389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:58,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:58,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:55:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270117029] [2023-11-06 22:55:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:55:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:55:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:55:58,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 532 [2023-11-06 22:55:58,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 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 22:55:58,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:58,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 532 [2023-11-06 22:55:58,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:59,449 INFO L124 PetriNetUnfolderBase]: 2668/3764 cut-off events. [2023-11-06 22:55:59,449 INFO L125 PetriNetUnfolderBase]: For 1536/1536 co-relation queries the response was YES. [2023-11-06 22:55:59,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8737 conditions, 3764 events. 2668/3764 cut-off events. For 1536/1536 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18239 event pairs, 655 based on Foata normal form. 106/3518 useless extension candidates. Maximal degree in co-relation 6349. Up to 2665 conditions per place. [2023-11-06 22:55:59,478 INFO L140 encePairwiseOnDemand]: 529/532 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-06 22:55:59,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 301 flow [2023-11-06 22:55:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:55:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:55:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-11-06 22:55:59,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855889724310777 [2023-11-06 22:55:59,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-11-06 22:55:59,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-11-06 22:55:59,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:59,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-11-06 22:55:59,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 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 22:55:59,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 22:55:59,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 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 22:55:59,492 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 116 flow. Second operand 3 states and 775 transitions. [2023-11-06 22:55:59,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 301 flow [2023-11-06 22:55:59,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:59,496 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 128 flow [2023-11-06 22:55:59,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-11-06 22:55:59,497 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-11-06 22:55:59,498 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 128 flow [2023-11-06 22:55:59,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 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 22:55:59,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:59,503 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:59,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:55:59,503 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 2 more)] === [2023-11-06 22:55:59,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1008123640, now seen corresponding path program 1 times [2023-11-06 22:55:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:59,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555023762] [2023-11-06 22:55:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:55:59,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:59,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555023762] [2023-11-06 22:55:59,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555023762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:55:59,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:55:59,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:55:59,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462187622] [2023-11-06 22:55:59,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:55:59,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:55:59,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:59,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:55:59,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:55:59,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 532 [2023-11-06 22:55:59,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 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 22:55:59,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:59,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 532 [2023-11-06 22:55:59,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:00,604 INFO L124 PetriNetUnfolderBase]: 3191/4597 cut-off events. [2023-11-06 22:56:00,604 INFO L125 PetriNetUnfolderBase]: For 2509/2509 co-relation queries the response was YES. [2023-11-06 22:56:00,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11225 conditions, 4597 events. 3191/4597 cut-off events. For 2509/2509 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24361 event pairs, 2374 based on Foata normal form. 95/4585 useless extension candidates. Maximal degree in co-relation 5018. Up to 3497 conditions per place. [2023-11-06 22:56:00,640 INFO L140 encePairwiseOnDemand]: 528/532 looper letters, 65 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-11-06 22:56:00,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 349 flow [2023-11-06 22:56:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:56:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:56:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 959 transitions. [2023-11-06 22:56:00,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506578947368421 [2023-11-06 22:56:00,645 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 959 transitions. [2023-11-06 22:56:00,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 959 transitions. [2023-11-06 22:56:00,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:00,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 959 transitions. [2023-11-06 22:56:00,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.75) internal successors, (959), 4 states have internal predecessors, (959), 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 22:56:00,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 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 22:56:00,657 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 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 22:56:00,657 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 128 flow. Second operand 4 states and 959 transitions. [2023-11-06 22:56:00,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 349 flow [2023-11-06 22:56:00,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 74 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:56:00,661 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 146 flow [2023-11-06 22:56:00,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-06 22:56:00,663 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-06 22:56:00,663 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 146 flow [2023-11-06 22:56:00,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 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 22:56:00,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:00,664 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:00,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:56:00,665 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 2 more)] === [2023-11-06 22:56:00,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1731605129, now seen corresponding path program 1 times [2023-11-06 22:56:00,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:00,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417177051] [2023-11-06 22:56:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:00,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:00,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417177051] [2023-11-06 22:56:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417177051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:00,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:00,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:56:00,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641005616] [2023-11-06 22:56:00,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:00,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:56:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:56:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:56:00,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 532 [2023-11-06 22:56:00,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 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 22:56:00,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:00,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 532 [2023-11-06 22:56:00,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:01,909 INFO L124 PetriNetUnfolderBase]: 3933/5791 cut-off events. [2023-11-06 22:56:01,909 INFO L125 PetriNetUnfolderBase]: For 3181/3181 co-relation queries the response was YES. [2023-11-06 22:56:01,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13875 conditions, 5791 events. 3933/5791 cut-off events. For 3181/3181 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33227 event pairs, 3012 based on Foata normal form. 161/5831 useless extension candidates. Maximal degree in co-relation 11242. Up to 4410 conditions per place. [2023-11-06 22:56:01,951 INFO L140 encePairwiseOnDemand]: 528/532 looper letters, 64 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-11-06 22:56:01,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 364 flow [2023-11-06 22:56:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:56:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:56:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 957 transitions. [2023-11-06 22:56:01,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44971804511278196 [2023-11-06 22:56:01,957 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 957 transitions. [2023-11-06 22:56:01,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 957 transitions. [2023-11-06 22:56:01,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:01,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 957 transitions. [2023-11-06 22:56:01,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.25) internal successors, (957), 4 states have internal predecessors, (957), 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 22:56:01,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 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 22:56:01,969 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 532.0) internal successors, (2660), 5 states have internal predecessors, (2660), 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 22:56:01,969 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 146 flow. Second operand 4 states and 957 transitions. [2023-11-06 22:56:01,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 364 flow [2023-11-06 22:56:01,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 360 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:56:01,974 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 165 flow [2023-11-06 22:56:01,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-06 22:56:01,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2023-11-06 22:56:01,975 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 165 flow [2023-11-06 22:56:01,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 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 22:56:01,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:01,977 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:01,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:56:01,977 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 2 more)] === [2023-11-06 22:56:01,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:01,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2015862586, now seen corresponding path program 1 times [2023-11-06 22:56:01,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:01,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410453336] [2023-11-06 22:56:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:01,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:02,522 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 22:56:02,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:02,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410453336] [2023-11-06 22:56:02,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410453336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:02,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:02,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:56:02,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623063124] [2023-11-06 22:56:02,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:02,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:56:02,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:56:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:56:02,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 532 [2023-11-06 22:56:02,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 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 22:56:02,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:02,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 532 [2023-11-06 22:56:02,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:04,387 INFO L124 PetriNetUnfolderBase]: 7101/10597 cut-off events. [2023-11-06 22:56:04,388 INFO L125 PetriNetUnfolderBase]: For 5423/5423 co-relation queries the response was YES. [2023-11-06 22:56:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24915 conditions, 10597 events. 7101/10597 cut-off events. For 5423/5423 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 66957 event pairs, 4668 based on Foata normal form. 166/10623 useless extension candidates. Maximal degree in co-relation 20482. Up to 6732 conditions per place. [2023-11-06 22:56:04,464 INFO L140 encePairwiseOnDemand]: 526/532 looper letters, 79 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-06 22:56:04,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 462 flow [2023-11-06 22:56:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:56:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:56:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1394 transitions. [2023-11-06 22:56:04,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367167919799499 [2023-11-06 22:56:04,473 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1394 transitions. [2023-11-06 22:56:04,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1394 transitions. [2023-11-06 22:56:04,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:04,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1394 transitions. [2023-11-06 22:56:04,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.33333333333334) internal successors, (1394), 6 states have internal predecessors, (1394), 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 22:56:04,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:04,491 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:04,492 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 165 flow. Second operand 6 states and 1394 transitions. [2023-11-06 22:56:04,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 462 flow [2023-11-06 22:56:04,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 457 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:56:04,499 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 193 flow [2023-11-06 22:56:04,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-11-06 22:56:04,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2023-11-06 22:56:04,501 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 193 flow [2023-11-06 22:56:04,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 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 22:56:04,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:04,502 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:56:04,503 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 2 more)] === [2023-11-06 22:56:04,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash -450334266, now seen corresponding path program 1 times [2023-11-06 22:56:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:04,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881683752] [2023-11-06 22:56:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:05,021 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 22:56:05,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:05,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881683752] [2023-11-06 22:56:05,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881683752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:05,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:05,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:56:05,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676833015] [2023-11-06 22:56:05,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:05,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:56:05,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:56:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:56:05,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 532 [2023-11-06 22:56:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 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 22:56:05,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:05,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 532 [2023-11-06 22:56:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:06,891 INFO L124 PetriNetUnfolderBase]: 5855/8669 cut-off events. [2023-11-06 22:56:06,892 INFO L125 PetriNetUnfolderBase]: For 4961/5055 co-relation queries the response was YES. [2023-11-06 22:56:06,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20794 conditions, 8669 events. 5855/8669 cut-off events. For 4961/5055 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 53545 event pairs, 2326 based on Foata normal form. 154/8699 useless extension candidates. Maximal degree in co-relation 15783. Up to 3867 conditions per place. [2023-11-06 22:56:06,939 INFO L140 encePairwiseOnDemand]: 525/532 looper letters, 65 selfloop transitions, 5 changer transitions 32/107 dead transitions. [2023-11-06 22:56:06,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 107 transitions, 553 flow [2023-11-06 22:56:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:56:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:56:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1412 transitions. [2023-11-06 22:56:06,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423558897243108 [2023-11-06 22:56:06,945 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1412 transitions. [2023-11-06 22:56:06,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1412 transitions. [2023-11-06 22:56:06,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:06,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1412 transitions. [2023-11-06 22:56:06,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.33333333333334) internal successors, (1412), 6 states have internal predecessors, (1412), 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 22:56:06,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:06,960 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:06,960 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 193 flow. Second operand 6 states and 1412 transitions. [2023-11-06 22:56:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 107 transitions, 553 flow [2023-11-06 22:56:06,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 107 transitions, 546 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:56:06,968 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 197 flow [2023-11-06 22:56:06,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-11-06 22:56:06,969 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2023-11-06 22:56:06,969 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 197 flow [2023-11-06 22:56:06,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.83333333333334) internal successors, (1349), 6 states have internal predecessors, (1349), 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 22:56:06,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:06,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:56:06,971 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 2 more)] === [2023-11-06 22:56:06,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1137062486, now seen corresponding path program 1 times [2023-11-06 22:56:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:06,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313134722] [2023-11-06 22:56:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:06,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:56:07,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:07,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313134722] [2023-11-06 22:56:07,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313134722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:07,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:07,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:56:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063174806] [2023-11-06 22:56:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:07,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:56:07,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:56:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:56:07,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 532 [2023-11-06 22:56:07,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 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 22:56:07,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:07,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 532 [2023-11-06 22:56:07,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:09,129 INFO L124 PetriNetUnfolderBase]: 7197/10001 cut-off events. [2023-11-06 22:56:09,130 INFO L125 PetriNetUnfolderBase]: For 6697/6697 co-relation queries the response was YES. [2023-11-06 22:56:09,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25979 conditions, 10001 events. 7197/10001 cut-off events. For 6697/6697 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54903 event pairs, 1324 based on Foata normal form. 600/10502 useless extension candidates. Maximal degree in co-relation 23338. Up to 5564 conditions per place. [2023-11-06 22:56:09,205 INFO L140 encePairwiseOnDemand]: 524/532 looper letters, 85 selfloop transitions, 10 changer transitions 11/110 dead transitions. [2023-11-06 22:56:09,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 625 flow [2023-11-06 22:56:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:56:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1603 transitions. [2023-11-06 22:56:09,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43045112781954886 [2023-11-06 22:56:09,214 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1603 transitions. [2023-11-06 22:56:09,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1603 transitions. [2023-11-06 22:56:09,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:09,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1603 transitions. [2023-11-06 22:56:09,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 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 22:56:09,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 532.0) internal successors, (4256), 8 states have internal predecessors, (4256), 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 22:56:09,233 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 532.0) internal successors, (4256), 8 states have internal predecessors, (4256), 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 22:56:09,234 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 197 flow. Second operand 7 states and 1603 transitions. [2023-11-06 22:56:09,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 625 flow [2023-11-06 22:56:09,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 110 transitions, 601 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-06 22:56:09,242 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 247 flow [2023-11-06 22:56:09,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-06 22:56:09,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2023-11-06 22:56:09,244 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 247 flow [2023-11-06 22:56:09,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 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 22:56:09,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:09,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:56:09,246 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 2 more)] === [2023-11-06 22:56:09,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash 836624790, now seen corresponding path program 1 times [2023-11-06 22:56:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:09,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742768643] [2023-11-06 22:56:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:56:09,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:09,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742768643] [2023-11-06 22:56:09,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742768643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:09,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:09,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:56:09,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951459636] [2023-11-06 22:56:09,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:09,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:56:09,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:56:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:56:09,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 532 [2023-11-06 22:56:09,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 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 22:56:09,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:09,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 532 [2023-11-06 22:56:09,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:10,982 INFO L124 PetriNetUnfolderBase]: 5696/7753 cut-off events. [2023-11-06 22:56:10,982 INFO L125 PetriNetUnfolderBase]: For 12569/13147 co-relation queries the response was YES. [2023-11-06 22:56:11,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23773 conditions, 7753 events. 5696/7753 cut-off events. For 12569/13147 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 39861 event pairs, 490 based on Foata normal form. 714/8383 useless extension candidates. Maximal degree in co-relation 23741. Up to 3926 conditions per place. [2023-11-06 22:56:11,044 INFO L140 encePairwiseOnDemand]: 526/532 looper letters, 83 selfloop transitions, 5 changer transitions 1/96 dead transitions. [2023-11-06 22:56:11,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 629 flow [2023-11-06 22:56:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:56:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:56:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1385 transitions. [2023-11-06 22:56:11,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43389724310776945 [2023-11-06 22:56:11,052 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1385 transitions. [2023-11-06 22:56:11,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1385 transitions. [2023-11-06 22:56:11,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:11,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1385 transitions. [2023-11-06 22:56:11,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.83333333333334) internal successors, (1385), 6 states have internal predecessors, (1385), 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 22:56:11,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:11,067 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:11,067 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 247 flow. Second operand 6 states and 1385 transitions. [2023-11-06 22:56:11,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 629 flow [2023-11-06 22:56:11,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 612 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-06 22:56:11,080 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 244 flow [2023-11-06 22:56:11,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-11-06 22:56:11,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2023-11-06 22:56:11,081 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 244 flow [2023-11-06 22:56:11,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 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 22:56:11,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:11,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:11,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:56:11,083 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 2 more)] === [2023-11-06 22:56:11,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash 777145997, now seen corresponding path program 1 times [2023-11-06 22:56:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:11,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620828640] [2023-11-06 22:56:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:56:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620828640] [2023-11-06 22:56:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620828640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:11,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:11,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:56:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163752078] [2023-11-06 22:56:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:56:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:56:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:56:11,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 532 [2023-11-06 22:56:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 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 22:56:11,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:11,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 532 [2023-11-06 22:56:11,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:13,063 INFO L124 PetriNetUnfolderBase]: 6846/8976 cut-off events. [2023-11-06 22:56:13,063 INFO L125 PetriNetUnfolderBase]: For 15137/16011 co-relation queries the response was YES. [2023-11-06 22:56:13,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29249 conditions, 8976 events. 6846/8976 cut-off events. For 15137/16011 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 41673 event pairs, 985 based on Foata normal form. 936/9870 useless extension candidates. Maximal degree in co-relation 29217. Up to 5876 conditions per place. [2023-11-06 22:56:13,126 INFO L140 encePairwiseOnDemand]: 524/532 looper letters, 103 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2023-11-06 22:56:13,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 784 flow [2023-11-06 22:56:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:56:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1593 transitions. [2023-11-06 22:56:13,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427765843179377 [2023-11-06 22:56:13,134 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1593 transitions. [2023-11-06 22:56:13,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1593 transitions. [2023-11-06 22:56:13,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:13,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1593 transitions. [2023-11-06 22:56:13,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 227.57142857142858) internal successors, (1593), 7 states have internal predecessors, (1593), 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 22:56:13,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 532.0) internal successors, (4256), 8 states have internal predecessors, (4256), 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 22:56:13,167 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 532.0) internal successors, (4256), 8 states have internal predecessors, (4256), 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 22:56:13,167 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 244 flow. Second operand 7 states and 1593 transitions. [2023-11-06 22:56:13,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 784 flow [2023-11-06 22:56:13,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 118 transitions, 769 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 22:56:13,179 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 303 flow [2023-11-06 22:56:13,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-11-06 22:56:13,181 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2023-11-06 22:56:13,182 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 303 flow [2023-11-06 22:56:13,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.5) internal successors, (1329), 6 states have internal predecessors, (1329), 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 22:56:13,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:13,183 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:13,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:56:13,184 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 2 more)] === [2023-11-06 22:56:13,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1405346273, now seen corresponding path program 2 times [2023-11-06 22:56:13,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:13,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855578143] [2023-11-06 22:56:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:13,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:13,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:13,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855578143] [2023-11-06 22:56:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855578143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:13,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610226693] [2023-11-06 22:56:13,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:13,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:13,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:13,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:56:13,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:13,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:13,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:56:13,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:13,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:56:13,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610226693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:13,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:56:13,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-06 22:56:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128565586] [2023-11-06 22:56:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:13,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:56:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:56:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:56:13,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 532 [2023-11-06 22:56:13,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 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 22:56:13,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:13,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 532 [2023-11-06 22:56:13,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:15,856 INFO L124 PetriNetUnfolderBase]: 13053/16974 cut-off events. [2023-11-06 22:56:15,856 INFO L125 PetriNetUnfolderBase]: For 34457/35974 co-relation queries the response was YES. [2023-11-06 22:56:15,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60439 conditions, 16974 events. 13053/16974 cut-off events. For 34457/35974 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 84349 event pairs, 1483 based on Foata normal form. 1266/18216 useless extension candidates. Maximal degree in co-relation 60405. Up to 5686 conditions per place. [2023-11-06 22:56:15,985 INFO L140 encePairwiseOnDemand]: 526/532 looper letters, 121 selfloop transitions, 18 changer transitions 0/145 dead transitions. [2023-11-06 22:56:15,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 145 transitions, 1000 flow [2023-11-06 22:56:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:56:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:56:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1516 transitions. [2023-11-06 22:56:15,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474937343358396 [2023-11-06 22:56:15,992 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1516 transitions. [2023-11-06 22:56:15,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1516 transitions. [2023-11-06 22:56:15,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:15,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1516 transitions. [2023-11-06 22:56:15,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 252.66666666666666) internal successors, (1516), 6 states have internal predecessors, (1516), 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 22:56:16,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:16,005 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:16,005 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 303 flow. Second operand 6 states and 1516 transitions. [2023-11-06 22:56:16,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 145 transitions, 1000 flow [2023-11-06 22:56:16,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 145 transitions, 986 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:56:16,046 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 457 flow [2023-11-06 22:56:16,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=457, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2023-11-06 22:56:16,046 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2023-11-06 22:56:16,047 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 457 flow [2023-11-06 22:56:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 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 22:56:16,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:16,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:16,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:56:16,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:16,254 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 2 more)] === [2023-11-06 22:56:16,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash 28087566, now seen corresponding path program 1 times [2023-11-06 22:56:16,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:16,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052909321] [2023-11-06 22:56:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:16,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:56:16,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052909321] [2023-11-06 22:56:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052909321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832653561] [2023-11-06 22:56:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:16,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:16,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:56:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:16,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:56:16,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 22:56:16,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:56:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832653561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:16,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:56:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-06 22:56:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100208747] [2023-11-06 22:56:16,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:16,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:56:16,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:56:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:56:16,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 532 [2023-11-06 22:56:16,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 457 flow. Second operand has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 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 22:56:16,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:16,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 532 [2023-11-06 22:56:16,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:22,560 INFO L124 PetriNetUnfolderBase]: 28918/38776 cut-off events. [2023-11-06 22:56:22,560 INFO L125 PetriNetUnfolderBase]: For 127347/130559 co-relation queries the response was YES. [2023-11-06 22:56:22,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147489 conditions, 38776 events. 28918/38776 cut-off events. For 127347/130559 co-relation queries the response was YES. Maximal size of possible extension queue 1412. Compared 220397 event pairs, 5119 based on Foata normal form. 2887/41200 useless extension candidates. Maximal degree in co-relation 147451. Up to 13404 conditions per place. [2023-11-06 22:56:22,836 INFO L140 encePairwiseOnDemand]: 526/532 looper letters, 149 selfloop transitions, 18 changer transitions 0/178 dead transitions. [2023-11-06 22:56:22,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 178 transitions, 1488 flow [2023-11-06 22:56:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:56:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:56:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1518 transitions. [2023-11-06 22:56:22,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755639097744361 [2023-11-06 22:56:22,844 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1518 transitions. [2023-11-06 22:56:22,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1518 transitions. [2023-11-06 22:56:22,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:22,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1518 transitions. [2023-11-06 22:56:22,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 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 22:56:22,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:22,857 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 532.0) internal successors, (3724), 7 states have internal predecessors, (3724), 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 22:56:22,857 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 457 flow. Second operand 6 states and 1518 transitions. [2023-11-06 22:56:22,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 178 transitions, 1488 flow [2023-11-06 22:56:23,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 178 transitions, 1479 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 22:56:23,019 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 617 flow [2023-11-06 22:56:23,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-11-06 22:56:23,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2023-11-06 22:56:23,020 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 617 flow [2023-11-06 22:56:23,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 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 22:56:23,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:23,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:23,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:56:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:23,227 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 2 more)] === [2023-11-06 22:56:23,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1082961455, now seen corresponding path program 1 times [2023-11-06 22:56:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:23,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594724472] [2023-11-06 22:56:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594724472] [2023-11-06 22:56:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594724472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955290687] [2023-11-06 22:56:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:28,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:28,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:28,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:28,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32cce8b-c556-4347-9f96-55a77fd2f50f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:56:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:28,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:56:28,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:29,794 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:56:29,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:56:29,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:29,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:56:29,930 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:56:29,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2023-11-06 22:56:30,296 INFO L322 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2023-11-06 22:56:30,297 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2023-11-06 22:56:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:56:30,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:32,483 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q1~0.offset Int) (~q1~0.base Int)) (let ((.cse0 (select |c_#memory_int| ~q1~0.base))) (or (not (= (select .cse0 (+ (* c_~q1_back~0 4) ~q1~0.offset)) (select (select |c_#memory_int| c_~f~0.base) (+ c_~f~0.offset (* c_~i~0 4))))) (= (+ (select .cse0 (+ (* c_~q1_front~0 4) ~q1~0.offset)) (select (select |c_#memory_int| c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))) c_~total~0) 0)))) is different from false [2023-11-06 22:56:32,530 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q1~0.offset Int) (~q1~0.base Int) (v_ArrVal_408 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_408))) (let ((.cse0 (select .cse1 ~q1~0.base))) (or (= (+ (select .cse0 (+ (* c_~q1_front~0 4) ~q1~0.offset)) c_~total~0 (select (select .cse1 c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))) 0) (not (= (select (select .cse1 c_~f~0.base) (+ c_~f~0.offset (* c_~i~0 4))) (select .cse0 (+ (* c_~q1_back~0 4) ~q1~0.offset)))))))) is different from false [2023-11-06 22:56:32,564 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q1~0.offset Int) (v_ArrVal_407 (Array Int Int)) (~q1~0.base Int) (v_ArrVal_408 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_407) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_408))) (let ((.cse1 (select .cse0 ~q1~0.base))) (or (not (= (select (select .cse0 c_~f~0.base) (+ c_~f~0.offset (* c_~i~0 4))) (select .cse1 (+ (* c_~q1_back~0 4) ~q1~0.offset)))) (= (+ (select .cse1 (+ (* c_~q1_front~0 4) ~q1~0.offset)) c_~total~0 (select (select .cse0 c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))) 0))))) is different from false [2023-11-06 22:56:32,757 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:56:32,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 898 treesize of output 1006 [2023-11-06 22:56:32,894 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:56:32,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 748 treesize of output 644 [2023-11-06 22:56:33,005 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:56:33,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 556 treesize of output 548