./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:20:39,693 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:20:39,815 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:20:39,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:20:39,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:20:39,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:20:39,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:20:39,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:20:39,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:20:39,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:20:39,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:20:39,878 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:20:39,878 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:20:39,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:20:39,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:20:39,881 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:20:39,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:20:39,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:20:39,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:20:39,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:20:39,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:20:39,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:20:39,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:20:39,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:20:39,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:20:39,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:20:39,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:20:39,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:20:39,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:39,888 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:20:39,889 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:20:39,890 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:20:39,890 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:20:39,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:20:39,892 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:20:39,893 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:20:39,893 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:20:39,893 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:20:39,894 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:20:39,894 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_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dd003755f1e361f3bbf00c3bfecbc1131b6df98a7806f5bb08971966b13d6ac [2023-11-12 02:20:40,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:20:40,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:20:40,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:20:40,207 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:20:40,208 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:20:40,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-12 02:20:43,322 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:20:43,586 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:20:43,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-12 02:20:43,598 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/data/f76befda4/2e8196b2fa0d47c59abcd1dc53ab4cd1/FLAG386e07ecd [2023-11-12 02:20:43,902 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/data/f76befda4/2e8196b2fa0d47c59abcd1dc53ab4cd1 [2023-11-12 02:20:43,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:20:43,906 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:20:43,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:43,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:20:43,914 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:20:43,915 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:43" (1/1) ... [2023-11-12 02:20:43,916 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eae85dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:43, skipping insertion in model container [2023-11-12 02:20:43,916 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:43" (1/1) ... [2023-11-12 02:20:43,945 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:20:44,120 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_7c2ea81e-672e-4731-938e-b4c4dcf085da/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3654,3667] [2023-11-12 02:20:44,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:44,141 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:20:44,170 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_7c2ea81e-672e-4731-938e-b4c4dcf085da/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3654,3667] [2023-11-12 02:20:44,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:44,184 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:20:44,184 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:20:44,192 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:20:44,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44 WrapperNode [2023-11-12 02:20:44,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:44,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:44,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:20:44,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:20:44,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,248 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 270 [2023-11-12 02:20:44,248 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:44,249 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:20:44,249 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:20:44,249 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:20:44,259 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,266 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,284 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,286 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:20:44,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:20:44,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:20:44,293 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:20:44,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (1/1) ... [2023-11-12 02:20:44,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:44,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:44,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:44,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:20:44,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:20:44,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:20:44,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:20:44,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:20:44,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:20:44,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:20:44,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:20:44,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:20:44,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:20:44,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:20:44,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:20:44,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:20:44,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:20:44,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:20:44,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:20:44,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:20:44,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:20:44,383 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:20:44,546 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:20:44,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:20:45,139 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:20:45,304 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:20:45,305 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 02:20:45,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:45 BoogieIcfgContainer [2023-11-12 02:20:45,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:20:45,311 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:20:45,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:20:45,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:20:45,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:20:43" (1/3) ... [2023-11-12 02:20:45,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1cbc66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:45, skipping insertion in model container [2023-11-12 02:20:45,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:44" (2/3) ... [2023-11-12 02:20:45,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1cbc66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:45, skipping insertion in model container [2023-11-12 02:20:45,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:45" (3/3) ... [2023-11-12 02:20:45,318 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-11-12 02:20:45,328 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:20:45,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:20:45,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:20:45,341 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:20:45,447 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:20:45,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 233 transitions, 487 flow [2023-11-12 02:20:45,691 INFO L124 PetriNetUnfolderBase]: 18/230 cut-off events. [2023-11-12 02:20:45,691 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:20:45,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 230 events. 18/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 143 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 189. Up to 3 conditions per place. [2023-11-12 02:20:45,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 233 transitions, 487 flow [2023-11-12 02:20:45,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 219 transitions, 456 flow [2023-11-12 02:20:45,719 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:20:45,738 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 219 transitions, 456 flow [2023-11-12 02:20:45,746 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 219 transitions, 456 flow [2023-11-12 02:20:45,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 219 transitions, 456 flow [2023-11-12 02:20:45,825 INFO L124 PetriNetUnfolderBase]: 18/219 cut-off events. [2023-11-12 02:20:45,825 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:20:45,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 219 events. 18/219 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 142 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 189. Up to 3 conditions per place. [2023-11-12 02:20:45,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 2194 [2023-11-12 02:20:56,367 INFO L134 LiptonReduction]: Checked pairs total: 2965 [2023-11-12 02:20:56,367 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-11-12 02:20:56,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:20:56,390 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6409083f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:20:56,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:20:56,400 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:20:56,401 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-12 02:20:56,401 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:20:56,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:56,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:56,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:20:56,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -798774810, now seen corresponding path program 1 times [2023-11-12 02:20:56,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:56,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524719581] [2023-11-12 02:20:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:56,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524719581] [2023-11-12 02:20:56,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524719581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:56,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:56,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:56,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082963899] [2023-11-12 02:20:56,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:56,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:57,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 463 [2023-11-12 02:20:57,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:57,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 463 [2023-11-12 02:20:57,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:57,269 INFO L124 PetriNetUnfolderBase]: 370/543 cut-off events. [2023-11-12 02:20:57,270 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-12 02:20:57,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1154 conditions, 543 events. 370/543 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1576 event pairs, 101 based on Foata normal form. 24/443 useless extension candidates. Maximal degree in co-relation 912. Up to 356 conditions per place. [2023-11-12 02:20:57,280 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-11-12 02:20:57,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 180 flow [2023-11-12 02:20:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:20:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-11-12 02:20:57,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715622750179986 [2023-11-12 02:20:57,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-11-12 02:20:57,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-11-12 02:20:57,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:57,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-11-12 02:20:57,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,334 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 655 transitions. [2023-11-12 02:20:57,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 180 flow [2023-11-12 02:20:57,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:20:57,341 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 81 flow [2023-11-12 02:20:57,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-11-12 02:20:57,346 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-12 02:20:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 81 flow [2023-11-12 02:20:57,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:57,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:57,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:20:57,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:20:57,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash 669374560, now seen corresponding path program 1 times [2023-11-12 02:20:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:57,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114589057] [2023-11-12 02:20:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:57,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:57,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:57,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114589057] [2023-11-12 02:20:57,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114589057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:57,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:57,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:57,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981823987] [2023-11-12 02:20:57,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:57,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:57,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:57,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 463 [2023-11-12 02:20:57,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:57,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 463 [2023-11-12 02:20:57,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:57,888 INFO L124 PetriNetUnfolderBase]: 399/604 cut-off events. [2023-11-12 02:20:57,888 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-12 02:20:57,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 604 events. 399/604 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1783 event pairs, 265 based on Foata normal form. 26/503 useless extension candidates. Maximal degree in co-relation 516. Up to 544 conditions per place. [2023-11-12 02:20:57,893 INFO L140 encePairwiseOnDemand]: 455/463 looper letters, 28 selfloop transitions, 2 changer transitions 14/44 dead transitions. [2023-11-12 02:20:57,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 202 flow [2023-11-12 02:20:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:20:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:20:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1015 transitions. [2023-11-12 02:20:57,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43844492440604754 [2023-11-12 02:20:57,899 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1015 transitions. [2023-11-12 02:20:57,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1015 transitions. [2023-11-12 02:20:57,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:57,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1015 transitions. [2023-11-12 02:20:57,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 463.0) internal successors, (2778), 6 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,916 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 463.0) internal successors, (2778), 6 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,917 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 81 flow. Second operand 5 states and 1015 transitions. [2023-11-12 02:20:57,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 202 flow [2023-11-12 02:20:57,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:20:57,921 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 100 flow [2023-11-12 02:20:57,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-12 02:20:57,928 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-12 02:20:57,928 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 100 flow [2023-11-12 02:20:57,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:57,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:57,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:20:57,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:20:57,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1140178873, now seen corresponding path program 1 times [2023-11-12 02:20:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:57,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125162026] [2023-11-12 02:20:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:58,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:58,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125162026] [2023-11-12 02:20:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125162026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:58,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:58,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:20:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784778666] [2023-11-12 02:20:58,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:58,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:58,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:58,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 463 [2023-11-12 02:20:58,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:58,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:58,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 463 [2023-11-12 02:20:58,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:58,433 INFO L124 PetriNetUnfolderBase]: 481/729 cut-off events. [2023-11-12 02:20:58,434 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2023-11-12 02:20:58,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 729 events. 481/729 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2312 event pairs, 329 based on Foata normal form. 22/606 useless extension candidates. Maximal degree in co-relation 1853. Up to 545 conditions per place. [2023-11-12 02:20:58,439 INFO L140 encePairwiseOnDemand]: 458/463 looper letters, 29 selfloop transitions, 2 changer transitions 15/46 dead transitions. [2023-11-12 02:20:58,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 238 flow [2023-11-12 02:20:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:20:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-11-12 02:20:58,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44330453563714906 [2023-11-12 02:20:58,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-11-12 02:20:58,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-11-12 02:20:58,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:58,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-11-12 02:20:58,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:58,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:58,454 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:58,455 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 100 flow. Second operand 4 states and 821 transitions. [2023-11-12 02:20:58,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 238 flow [2023-11-12 02:20:58,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 226 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-12 02:20:58,458 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 108 flow [2023-11-12 02:20:58,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-12 02:20:58,460 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-11-12 02:20:58,464 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 108 flow [2023-11-12 02:20:58,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.75) internal successors, (799), 4 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:58,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:58,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:58,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:20:58,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:20:58,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -8323683, now seen corresponding path program 1 times [2023-11-12 02:20:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:58,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029364795] [2023-11-12 02:20:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:58,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:20:59,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:59,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029364795] [2023-11-12 02:20:59,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029364795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:59,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:59,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:20:59,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541821549] [2023-11-12 02:20:59,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:59,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:20:59,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:20:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:00,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 463 [2023-11-12 02:21:00,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 108 flow. Second operand has 9 states, 9 states have (on average 193.66666666666666) internal successors, (1743), 9 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:00,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:00,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 463 [2023-11-12 02:21:00,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:00,628 INFO L124 PetriNetUnfolderBase]: 592/882 cut-off events. [2023-11-12 02:21:00,628 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-11-12 02:21:00,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 882 events. 592/882 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3146 event pairs, 27 based on Foata normal form. 1/678 useless extension candidates. Maximal degree in co-relation 2363. Up to 596 conditions per place. [2023-11-12 02:21:00,636 INFO L140 encePairwiseOnDemand]: 452/463 looper letters, 73 selfloop transitions, 22 changer transitions 3/98 dead transitions. [2023-11-12 02:21:00,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 98 transitions, 513 flow [2023-11-12 02:21:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:21:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:21:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1814 transitions. [2023-11-12 02:21:00,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353251739860811 [2023-11-12 02:21:00,644 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1814 transitions. [2023-11-12 02:21:00,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1814 transitions. [2023-11-12 02:21:00,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:00,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1814 transitions. [2023-11-12 02:21:00,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.55555555555554) internal successors, (1814), 9 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:00,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:00,667 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:00,667 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 108 flow. Second operand 9 states and 1814 transitions. [2023-11-12 02:21:00,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 98 transitions, 513 flow [2023-11-12 02:21:00,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 98 transitions, 493 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:00,673 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 261 flow [2023-11-12 02:21:00,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2023-11-12 02:21:00,675 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-11-12 02:21:00,675 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 261 flow [2023-11-12 02:21:00,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 193.66666666666666) internal successors, (1743), 9 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:00,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:00,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:00,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:21:00,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:00,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1405525435, now seen corresponding path program 2 times [2023-11-12 02:21:00,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:00,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500219449] [2023-11-12 02:21:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:00,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:00,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500219449] [2023-11-12 02:21:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500219449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:00,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:00,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585676376] [2023-11-12 02:21:00,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:00,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:00,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:00,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:00,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 463 [2023-11-12 02:21:00,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:00,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:00,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 463 [2023-11-12 02:21:00,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:00,988 INFO L124 PetriNetUnfolderBase]: 481/735 cut-off events. [2023-11-12 02:21:00,988 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-11-12 02:21:00,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2471 conditions, 735 events. 481/735 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2479 event pairs, 121 based on Foata normal form. 12/589 useless extension candidates. Maximal degree in co-relation 2446. Up to 674 conditions per place. [2023-11-12 02:21:00,995 INFO L140 encePairwiseOnDemand]: 459/463 looper letters, 50 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-12 02:21:00,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 353 flow [2023-11-12 02:21:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-11-12 02:21:00,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46724262059035276 [2023-11-12 02:21:00,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-11-12 02:21:00,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-11-12 02:21:01,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:01,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-11-12 02:21:01,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:01,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:01,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 463.0) internal successors, (1852), 4 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:01,007 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 261 flow. Second operand 3 states and 649 transitions. [2023-11-12 02:21:01,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 353 flow [2023-11-12 02:21:01,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 319 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-12 02:21:01,015 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 206 flow [2023-11-12 02:21:01,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-11-12 02:21:01,018 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-11-12 02:21:01,018 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 206 flow [2023-11-12 02:21:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:01,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:01,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:01,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:21:01,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:01,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1000979861, now seen corresponding path program 3 times [2023-11-12 02:21:01,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:01,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497605482] [2023-11-12 02:21:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:02,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:02,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497605482] [2023-11-12 02:21:02,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497605482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:02,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:02,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407401055] [2023-11-12 02:21:02,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:02,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:21:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:21:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 463 [2023-11-12 02:21:02,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 206 flow. Second operand has 9 states, 9 states have (on average 192.66666666666666) internal successors, (1734), 9 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:02,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:02,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 463 [2023-11-12 02:21:02,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:02,778 INFO L124 PetriNetUnfolderBase]: 548/847 cut-off events. [2023-11-12 02:21:02,778 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2023-11-12 02:21:02,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2811 conditions, 847 events. 548/847 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3034 event pairs, 103 based on Foata normal form. 1/677 useless extension candidates. Maximal degree in co-relation 2785. Up to 708 conditions per place. [2023-11-12 02:21:02,786 INFO L140 encePairwiseOnDemand]: 452/463 looper letters, 71 selfloop transitions, 16 changer transitions 3/90 dead transitions. [2023-11-12 02:21:02,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 540 flow [2023-11-12 02:21:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:21:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:21:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1784 transitions. [2023-11-12 02:21:02,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281257499400048 [2023-11-12 02:21:02,794 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1784 transitions. [2023-11-12 02:21:02,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1784 transitions. [2023-11-12 02:21:02,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:02,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1784 transitions. [2023-11-12 02:21:02,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.22222222222223) internal successors, (1784), 9 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:02,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:02,814 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:02,814 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 206 flow. Second operand 9 states and 1784 transitions. [2023-11-12 02:21:02,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 540 flow [2023-11-12 02:21:02,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:02,820 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 328 flow [2023-11-12 02:21:02,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=328, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-11-12 02:21:02,824 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2023-11-12 02:21:02,824 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 328 flow [2023-11-12 02:21:02,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 192.66666666666666) internal successors, (1734), 9 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:02,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:02,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:02,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:21:02,826 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:02,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1905462415, now seen corresponding path program 4 times [2023-11-12 02:21:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:02,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469502046] [2023-11-12 02:21:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:03,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:03,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469502046] [2023-11-12 02:21:03,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469502046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:03,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:03,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:03,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966250304] [2023-11-12 02:21:03,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:03,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:21:03,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:21:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:03,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 463 [2023-11-12 02:21:03,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 328 flow. Second operand has 9 states, 9 states have (on average 192.66666666666666) internal successors, (1734), 9 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:03,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:03,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 463 [2023-11-12 02:21:03,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:04,414 INFO L124 PetriNetUnfolderBase]: 607/947 cut-off events. [2023-11-12 02:21:04,414 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-11-12 02:21:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3517 conditions, 947 events. 607/947 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3527 event pairs, 159 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3487. Up to 808 conditions per place. [2023-11-12 02:21:04,424 INFO L140 encePairwiseOnDemand]: 452/463 looper letters, 75 selfloop transitions, 19 changer transitions 3/97 dead transitions. [2023-11-12 02:21:04,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 97 transitions, 689 flow [2023-11-12 02:21:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:21:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:21:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1782 transitions. [2023-11-12 02:21:04,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42764578833693306 [2023-11-12 02:21:04,433 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1782 transitions. [2023-11-12 02:21:04,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1782 transitions. [2023-11-12 02:21:04,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:04,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1782 transitions. [2023-11-12 02:21:04,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.0) internal successors, (1782), 9 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:04,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:04,451 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:04,452 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 328 flow. Second operand 9 states and 1782 transitions. [2023-11-12 02:21:04,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 97 transitions, 689 flow [2023-11-12 02:21:04,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 653 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-12 02:21:04,463 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 465 flow [2023-11-12 02:21:04,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-11-12 02:21:04,465 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-11-12 02:21:04,465 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 465 flow [2023-11-12 02:21:04,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 192.66666666666666) internal successors, (1734), 9 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:04,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:04,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:04,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:21:04,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:04,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:04,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1751578059, now seen corresponding path program 5 times [2023-11-12 02:21:04,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:04,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053577741] [2023-11-12 02:21:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:04,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:05,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:05,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053577741] [2023-11-12 02:21:05,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053577741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:05,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:05,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452285325] [2023-11-12 02:21:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:21:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:21:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:05,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 463 [2023-11-12 02:21:05,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 465 flow. Second operand has 9 states, 9 states have (on average 193.66666666666666) internal successors, (1743), 9 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:05,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:05,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 463 [2023-11-12 02:21:05,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:06,281 INFO L124 PetriNetUnfolderBase]: 616/971 cut-off events. [2023-11-12 02:21:06,281 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2023-11-12 02:21:06,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 971 events. 616/971 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3720 event pairs, 131 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3830. Up to 743 conditions per place. [2023-11-12 02:21:06,294 INFO L140 encePairwiseOnDemand]: 452/463 looper letters, 87 selfloop transitions, 25 changer transitions 3/115 dead transitions. [2023-11-12 02:21:06,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 115 transitions, 870 flow [2023-11-12 02:21:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:21:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:21:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1801 transitions. [2023-11-12 02:21:06,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322054235661147 [2023-11-12 02:21:06,304 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1801 transitions. [2023-11-12 02:21:06,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1801 transitions. [2023-11-12 02:21:06,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:06,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1801 transitions. [2023-11-12 02:21:06,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.11111111111111) internal successors, (1801), 9 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:06,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:06,324 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 463.0) internal successors, (4630), 10 states have internal predecessors, (4630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:06,325 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 465 flow. Second operand 9 states and 1801 transitions. [2023-11-12 02:21:06,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 115 transitions, 870 flow [2023-11-12 02:21:06,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 115 transitions, 829 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:06,345 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 573 flow [2023-11-12 02:21:06,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=573, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2023-11-12 02:21:06,347 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2023-11-12 02:21:06,348 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 573 flow [2023-11-12 02:21:06,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 193.66666666666666) internal successors, (1743), 9 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:06,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:06,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:21:06,350 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:06,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:06,360 INFO L85 PathProgramCache]: Analyzing trace with hash -337430929, now seen corresponding path program 1 times [2023-11-12 02:21:06,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:06,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973963970] [2023-11-12 02:21:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:06,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:06,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:06,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973963970] [2023-11-12 02:21:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973963970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718395202] [2023-11-12 02:21:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:06,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:06,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:06,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:06,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:06,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:21:06,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:06,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:07,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718395202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:07,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:07,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:21:07,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483659261] [2023-11-12 02:21:07,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:07,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:21:07,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:21:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:21:07,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 463 [2023-11-12 02:21:07,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 573 flow. Second operand has 12 states, 12 states have (on average 190.91666666666666) internal successors, (2291), 12 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:07,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:07,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 463 [2023-11-12 02:21:07,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:07,872 INFO L124 PetriNetUnfolderBase]: 1097/1774 cut-off events. [2023-11-12 02:21:07,872 INFO L125 PetriNetUnfolderBase]: For 4135/4135 co-relation queries the response was YES. [2023-11-12 02:21:07,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7433 conditions, 1774 events. 1097/1774 cut-off events. For 4135/4135 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8025 event pairs, 533 based on Foata normal form. 44/1556 useless extension candidates. Maximal degree in co-relation 7169. Up to 971 conditions per place. [2023-11-12 02:21:07,895 INFO L140 encePairwiseOnDemand]: 457/463 looper letters, 141 selfloop transitions, 8 changer transitions 5/154 dead transitions. [2023-11-12 02:21:07,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 154 transitions, 1444 flow [2023-11-12 02:21:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:21:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:21:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1379 transitions. [2023-11-12 02:21:07,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42548596112311016 [2023-11-12 02:21:07,902 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1379 transitions. [2023-11-12 02:21:07,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1379 transitions. [2023-11-12 02:21:07,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:07,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1379 transitions. [2023-11-12 02:21:07,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:07,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 463.0) internal successors, (3704), 8 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:07,924 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 463.0) internal successors, (3704), 8 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:07,924 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 573 flow. Second operand 7 states and 1379 transitions. [2023-11-12 02:21:07,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 154 transitions, 1444 flow [2023-11-12 02:21:07,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 154 transitions, 1272 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-11-12 02:21:07,994 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 584 flow [2023-11-12 02:21:07,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=584, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2023-11-12 02:21:07,996 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2023-11-12 02:21:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 584 flow [2023-11-12 02:21:07,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.91666666666666) internal successors, (2291), 12 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:07,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:07,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:08,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:08,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:08,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:08,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -825868421, now seen corresponding path program 1 times [2023-11-12 02:21:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:08,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960578650] [2023-11-12 02:21:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:08,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960578650] [2023-11-12 02:21:08,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960578650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759719206] [2023-11-12 02:21:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:08,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:08,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:08,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:08,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:08,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:21:08,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:08,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759719206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:08,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-11-12 02:21:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852096408] [2023-11-12 02:21:08,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:21:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:21:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:21:09,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 463 [2023-11-12 02:21:09,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 584 flow. Second operand has 13 states, 13 states have (on average 189.0) internal successors, (2457), 13 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:09,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:09,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 463 [2023-11-12 02:21:09,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:10,022 INFO L124 PetriNetUnfolderBase]: 1970/3265 cut-off events. [2023-11-12 02:21:10,023 INFO L125 PetriNetUnfolderBase]: For 6097/6097 co-relation queries the response was YES. [2023-11-12 02:21:10,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12814 conditions, 3265 events. 1970/3265 cut-off events. For 6097/6097 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17762 event pairs, 564 based on Foata normal form. 86/2903 useless extension candidates. Maximal degree in co-relation 12370. Up to 1158 conditions per place. [2023-11-12 02:21:10,061 INFO L140 encePairwiseOnDemand]: 455/463 looper letters, 137 selfloop transitions, 24 changer transitions 14/175 dead transitions. [2023-11-12 02:21:10,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 175 transitions, 1558 flow [2023-11-12 02:21:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:21:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:21:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1574 transitions. [2023-11-12 02:21:10,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249460043196544 [2023-11-12 02:21:10,068 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1574 transitions. [2023-11-12 02:21:10,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1574 transitions. [2023-11-12 02:21:10,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:10,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1574 transitions. [2023-11-12 02:21:10,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 196.75) internal successors, (1574), 8 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:10,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:10,082 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 463.0) internal successors, (4167), 9 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:10,082 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 584 flow. Second operand 8 states and 1574 transitions. [2023-11-12 02:21:10,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 175 transitions, 1558 flow [2023-11-12 02:21:10,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 175 transitions, 1522 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-12 02:21:10,133 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 762 flow [2023-11-12 02:21:10,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2023-11-12 02:21:10,134 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 53 predicate places. [2023-11-12 02:21:10,134 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 762 flow [2023-11-12 02:21:10,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.0) internal successors, (2457), 13 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:10,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:10,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:10,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:10,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:21:10,342 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:10,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash -667418656, now seen corresponding path program 1 times [2023-11-12 02:21:10,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:10,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550611710] [2023-11-12 02:21:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:10,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550611710] [2023-11-12 02:21:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550611710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974101103] [2023-11-12 02:21:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:10,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:10,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:10,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:21:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:10,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:21:10,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:10,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974101103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:10,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:21:10,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-12 02:21:10,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343578063] [2023-11-12 02:21:10,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:10,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:10,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:21:10,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 463 [2023-11-12 02:21:10,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 762 flow. Second operand has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:10,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:10,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 463 [2023-11-12 02:21:10,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:11,578 INFO L124 PetriNetUnfolderBase]: 1865/3112 cut-off events. [2023-11-12 02:21:11,578 INFO L125 PetriNetUnfolderBase]: For 8791/8791 co-relation queries the response was YES. [2023-11-12 02:21:11,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13302 conditions, 3112 events. 1865/3112 cut-off events. For 8791/8791 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16919 event pairs, 432 based on Foata normal form. 172/2752 useless extension candidates. Maximal degree in co-relation 13114. Up to 1304 conditions per place. [2023-11-12 02:21:11,685 INFO L140 encePairwiseOnDemand]: 459/463 looper letters, 96 selfloop transitions, 15 changer transitions 13/124 dead transitions. [2023-11-12 02:21:11,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 1201 flow [2023-11-12 02:21:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 883 transitions. [2023-11-12 02:21:11,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767818574514039 [2023-11-12 02:21:11,692 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 883 transitions. [2023-11-12 02:21:11,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 883 transitions. [2023-11-12 02:21:11,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:11,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 883 transitions. [2023-11-12 02:21:11,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:11,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:11,701 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:11,702 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 762 flow. Second operand 4 states and 883 transitions. [2023-11-12 02:21:11,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 1201 flow [2023-11-12 02:21:11,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 1099 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-12 02:21:11,801 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 529 flow [2023-11-12 02:21:11,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=529, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2023-11-12 02:21:11,802 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2023-11-12 02:21:11,802 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 529 flow [2023-11-12 02:21:11,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:11,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:11,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:11,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:12,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:21:12,009 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:12,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash 298128969, now seen corresponding path program 2 times [2023-11-12 02:21:12,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:12,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099826410] [2023-11-12 02:21:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:12,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:21:12,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099826410] [2023-11-12 02:21:12,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099826410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:12,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:12,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:12,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27544838] [2023-11-12 02:21:12,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:12,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:21:12,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:21:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:12,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 463 [2023-11-12 02:21:12,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 529 flow. Second operand has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:12,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:12,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 463 [2023-11-12 02:21:12,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:12,993 INFO L124 PetriNetUnfolderBase]: 2509/3995 cut-off events. [2023-11-12 02:21:12,993 INFO L125 PetriNetUnfolderBase]: For 11879/11879 co-relation queries the response was YES. [2023-11-12 02:21:13,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18157 conditions, 3995 events. 2509/3995 cut-off events. For 11879/11879 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 20502 event pairs, 622 based on Foata normal form. 66/3185 useless extension candidates. Maximal degree in co-relation 18044. Up to 1517 conditions per place. [2023-11-12 02:21:13,040 INFO L140 encePairwiseOnDemand]: 458/463 looper letters, 79 selfloop transitions, 12 changer transitions 18/109 dead transitions. [2023-11-12 02:21:13,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 1037 flow [2023-11-12 02:21:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 877 transitions. [2023-11-12 02:21:13,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354211663066953 [2023-11-12 02:21:13,045 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 877 transitions. [2023-11-12 02:21:13,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 877 transitions. [2023-11-12 02:21:13,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:13,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 877 transitions. [2023-11-12 02:21:13,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:13,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:13,052 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 463.0) internal successors, (2315), 5 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:13,053 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 529 flow. Second operand 4 states and 877 transitions. [2023-11-12 02:21:13,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 1037 flow [2023-11-12 02:21:13,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 109 transitions, 929 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-11-12 02:21:13,084 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 418 flow [2023-11-12 02:21:13,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=418, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2023-11-12 02:21:13,086 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 48 predicate places. [2023-11-12 02:21:13,086 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 418 flow [2023-11-12 02:21:13,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:13,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:13,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:21:13,087 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:13,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -311581786, now seen corresponding path program 2 times [2023-11-12 02:21:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895348228] [2023-11-12 02:21:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:13,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:13,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895348228] [2023-11-12 02:21:13,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895348228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:13,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067323754] [2023-11-12 02:21:13,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:21:13,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:13,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:13,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:21:14,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:21:14,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:21:14,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:21:14,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:14,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:21:14,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:21:14,610 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:21:14,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-12 02:21:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:14,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:14,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:21:14,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-12 02:21:14,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-12 02:21:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:15,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067323754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:15,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:15,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-12 02:21:15,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627179201] [2023-11-12 02:21:15,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:21:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:21:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:21:16,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 463 [2023-11-12 02:21:16,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 418 flow. Second operand has 24 states, 24 states have (on average 172.66666666666666) internal successors, (4144), 24 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:16,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:16,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 463 [2023-11-12 02:21:16,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:21,173 INFO L124 PetriNetUnfolderBase]: 7626/11542 cut-off events. [2023-11-12 02:21:21,173 INFO L125 PetriNetUnfolderBase]: For 35143/35143 co-relation queries the response was YES. [2023-11-12 02:21:21,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52879 conditions, 11542 events. 7626/11542 cut-off events. For 35143/35143 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 67523 event pairs, 846 based on Foata normal form. 0/8820 useless extension candidates. Maximal degree in co-relation 52852. Up to 3137 conditions per place. [2023-11-12 02:21:21,317 INFO L140 encePairwiseOnDemand]: 453/463 looper letters, 272 selfloop transitions, 84 changer transitions 14/370 dead transitions. [2023-11-12 02:21:21,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 370 transitions, 3536 flow [2023-11-12 02:21:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:21:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:21:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4315 transitions. [2023-11-12 02:21:21,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883189344852412 [2023-11-12 02:21:21,334 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4315 transitions. [2023-11-12 02:21:21,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4315 transitions. [2023-11-12 02:21:21,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:21,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4315 transitions. [2023-11-12 02:21:21,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 179.79166666666666) internal successors, (4315), 24 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:21,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 463.0) internal successors, (11575), 25 states have internal predecessors, (11575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:21,374 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 463.0) internal successors, (11575), 25 states have internal predecessors, (11575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:21,374 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 418 flow. Second operand 24 states and 4315 transitions. [2023-11-12 02:21:21,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 370 transitions, 3536 flow [2023-11-12 02:21:21,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 370 transitions, 3094 flow, removed 221 selfloop flow, removed 4 redundant places. [2023-11-12 02:21:21,550 INFO L231 Difference]: Finished difference. Result has 99 places, 148 transitions, 1429 flow [2023-11-12 02:21:21,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=463, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1429, PETRI_PLACES=99, PETRI_TRANSITIONS=148} [2023-11-12 02:21:21,551 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 67 predicate places. [2023-11-12 02:21:21,551 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 148 transitions, 1429 flow [2023-11-12 02:21:21,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 172.66666666666666) internal successors, (4144), 24 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:21,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:21,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:21,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:21,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:21:21,765 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:21:21,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2076021526, now seen corresponding path program 3 times [2023-11-12 02:21:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792404274] [2023-11-12 02:21:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:22,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792404274] [2023-11-12 02:21:22,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792404274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923529928] [2023-11-12 02:21:22,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:21:22,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:22,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:22,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c2ea81e-672e-4731-938e-b4c4dcf085da/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:21:22,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:21:22,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:21:22,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:21:23,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:23,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-12 02:21:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:23,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:23,341 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:21:23,341 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-12 02:21:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:23,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923529928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:23,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-12 02:21:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948094780] [2023-11-12 02:21:23,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:21:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:21:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:21:24,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 463 [2023-11-12 02:21:24,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 148 transitions, 1429 flow. Second operand has 22 states, 22 states have (on average 172.9090909090909) internal successors, (3804), 22 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:24,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:24,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 463 [2023-11-12 02:21:24,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand