./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/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_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/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_45f70530-adff-400c-9dd4-8f942ae704bc/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 b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:28,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:28,559 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:28,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:28,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:28,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:28,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:28,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:28,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:28,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:28,630 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:28,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:28,632 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:28,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:28,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:28,635 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:28,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:28,636 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:28,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:28,637 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:28,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:28,639 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:28,639 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:28,640 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:28,640 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:28,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:28,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:28,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:28,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:28,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:28,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:28,646 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:28,646 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:28,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:28,647 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:28,647 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:28,648 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:28,648 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:28,648 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:28,648 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_45f70530-adff-400c-9dd4-8f942ae704bc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 [2023-11-12 02:21:29,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:29,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:29,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:29,047 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:29,048 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:29,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2023-11-12 02:21:32,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:32,705 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:32,706 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2023-11-12 02:21:32,721 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/data/142441bd0/1289abdfc75b4668a131b2cb103ebe35/FLAGed26b3671 [2023-11-12 02:21:32,740 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/data/142441bd0/1289abdfc75b4668a131b2cb103ebe35 [2023-11-12 02:21:32,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:32,746 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:32,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:32,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:32,755 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:32,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:32" (1/1) ... [2023-11-12 02:21:32,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593913d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:32, skipping insertion in model container [2023-11-12 02:21:32,759 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:32" (1/1) ... [2023-11-12 02:21:32,797 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:33,085 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_45f70530-adff-400c-9dd4-8f942ae704bc/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2023-11-12 02:21:33,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:33,115 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:33,151 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_45f70530-adff-400c-9dd4-8f942ae704bc/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2023-11-12 02:21:33,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:33,162 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:21:33,167 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:21:33,174 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:33,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33 WrapperNode [2023-11-12 02:21:33,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:33,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:33,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:33,178 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:33,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,226 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2023-11-12 02:21:33,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:33,228 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:33,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:33,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:33,239 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,244 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,258 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,263 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:33,264 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:33,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:33,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:33,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (1/1) ... [2023-11-12 02:21:33,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:33,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:33,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:21:33,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:21:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:21:33,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:21:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:21:33,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:21:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:21:33,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:21:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:21:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:21:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:21:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:21:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:33,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:21:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:21:33,366 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 02:21:33,479 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:33,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:33,866 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:33,925 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:33,925 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:21:33,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:33 BoogieIcfgContainer [2023-11-12 02:21:33,929 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:33,932 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:33,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:33,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:33,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:32" (1/3) ... [2023-11-12 02:21:33,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199d993b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:33, skipping insertion in model container [2023-11-12 02:21:33,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:33" (2/3) ... [2023-11-12 02:21:33,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199d993b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:33, skipping insertion in model container [2023-11-12 02:21:33,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:33" (3/3) ... [2023-11-12 02:21:33,940 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-11-12 02:21:33,950 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:21:33,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:33,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:33,962 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:21:34,080 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:21:34,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 139 transitions, 306 flow [2023-11-12 02:21:34,226 INFO L124 PetriNetUnfolderBase]: 10/135 cut-off events. [2023-11-12 02:21:34,227 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:21:34,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 135 events. 10/135 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 92. Up to 2 conditions per place. [2023-11-12 02:21:34,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 139 transitions, 306 flow [2023-11-12 02:21:34,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 122 transitions, 268 flow [2023-11-12 02:21:34,254 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:21:34,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 122 transitions, 268 flow [2023-11-12 02:21:34,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 122 transitions, 268 flow [2023-11-12 02:21:34,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 122 transitions, 268 flow [2023-11-12 02:21:34,334 INFO L124 PetriNetUnfolderBase]: 10/122 cut-off events. [2023-11-12 02:21:34,334 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:21:34,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 122 events. 10/122 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 92. Up to 2 conditions per place. [2023-11-12 02:21:34,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-12 02:21:38,819 INFO L134 LiptonReduction]: Checked pairs total: 3272 [2023-11-12 02:21:38,819 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-11-12 02:21:38,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:38,855 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;@1f966467, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:38,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:21:38,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:21:38,883 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-12 02:21:38,883 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:21:38,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:38,884 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 02:21:38,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:38,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:38,892 INFO L85 PathProgramCache]: Analyzing trace with hash -527290099, now seen corresponding path program 1 times [2023-11-12 02:21:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30410746] [2023-11-12 02:21:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:38,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:39,567 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 02:21:39,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:39,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30410746] [2023-11-12 02:21:39,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30410746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:39,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:39,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:21:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241624046] [2023-11-12 02:21:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:39,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:39,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 242 [2023-11-12 02:21:39,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 02:21:39,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:39,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 242 [2023-11-12 02:21:39,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:40,042 INFO L124 PetriNetUnfolderBase]: 1680/2288 cut-off events. [2023-11-12 02:21:40,042 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2023-11-12 02:21:40,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 2288 events. 1680/2288 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8188 event pairs, 624 based on Foata normal form. 1/1777 useless extension candidates. Maximal degree in co-relation 3668. Up to 1345 conditions per place. [2023-11-12 02:21:40,065 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 47 selfloop transitions, 3 changer transitions 3/53 dead transitions. [2023-11-12 02:21:40,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 257 flow [2023-11-12 02:21:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:21:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-11-12 02:21:40,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.568870523415978 [2023-11-12 02:21:40,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-11-12 02:21:40,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-11-12 02:21:40,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:40,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-11-12 02:21:40,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 02:21:40,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:21:40,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:21:40,103 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 413 transitions. [2023-11-12 02:21:40,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 257 flow [2023-11-12 02:21:40,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 227 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-12 02:21:40,115 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-11-12 02:21:40,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-12 02:21:40,121 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-12 02:21:40,121 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-11-12 02:21:40,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 02:21:40,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:40,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:40,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:21:40,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:40,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:40,124 INFO L85 PathProgramCache]: Analyzing trace with hash -114306080, now seen corresponding path program 1 times [2023-11-12 02:21:40,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:40,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871656973] [2023-11-12 02:21:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:40,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:40,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:40,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871656973] [2023-11-12 02:21:40,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871656973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:40,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:21:40,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522269458] [2023-11-12 02:21:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:40,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:21:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:21:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:40,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 242 [2023-11-12 02:21:40,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 02:21:40,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:40,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 242 [2023-11-12 02:21:40,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:41,085 INFO L124 PetriNetUnfolderBase]: 2083/2891 cut-off events. [2023-11-12 02:21:41,085 INFO L125 PetriNetUnfolderBase]: For 566/566 co-relation queries the response was YES. [2023-11-12 02:21:41,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6568 conditions, 2891 events. 2083/2891 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11575 event pairs, 710 based on Foata normal form. 202/3093 useless extension candidates. Maximal degree in co-relation 2218. Up to 1464 conditions per place. [2023-11-12 02:21:41,105 INFO L140 encePairwiseOnDemand]: 234/242 looper letters, 62 selfloop transitions, 4 changer transitions 17/83 dead transitions. [2023-11-12 02:21:41,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 83 transitions, 385 flow [2023-11-12 02:21:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:21:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 629 transitions. [2023-11-12 02:21:41,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198347107438016 [2023-11-12 02:21:41,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 629 transitions. [2023-11-12 02:21:41,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 629 transitions. [2023-11-12 02:21:41,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:41,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 629 transitions. [2023-11-12 02:21:41,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 02:21:41,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:21:41,120 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:21:41,120 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 629 transitions. [2023-11-12 02:21:41,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 83 transitions, 385 flow [2023-11-12 02:21:41,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 83 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:41,124 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 123 flow [2023-11-12 02:21:41,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-12 02:21:41,125 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-12 02:21:41,126 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 123 flow [2023-11-12 02:21:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 02:21:41,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:41,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:41,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:21:41,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:41,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1541703220, now seen corresponding path program 2 times [2023-11-12 02:21:41,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:41,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896419548] [2023-11-12 02:21:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:41,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896419548] [2023-11-12 02:21:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896419548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:41,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:41,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:41,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913797160] [2023-11-12 02:21:41,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:41,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:41,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:41,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:41,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:41,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:41,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:41,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:41,867 INFO L124 PetriNetUnfolderBase]: 2610/3676 cut-off events. [2023-11-12 02:21:41,867 INFO L125 PetriNetUnfolderBase]: For 4132/4132 co-relation queries the response was YES. [2023-11-12 02:21:41,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10248 conditions, 3676 events. 2610/3676 cut-off events. For 4132/4132 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15663 event pairs, 940 based on Foata normal form. 162/3838 useless extension candidates. Maximal degree in co-relation 4472. Up to 1920 conditions per place. [2023-11-12 02:21:41,899 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 72 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-11-12 02:21:41,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 75 transitions, 426 flow [2023-11-12 02:21:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 517 transitions. [2023-11-12 02:21:41,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2023-11-12 02:21:41,903 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 517 transitions. [2023-11-12 02:21:41,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 517 transitions. [2023-11-12 02:21:41,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:41,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 517 transitions. [2023-11-12 02:21:41,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 02:21:41,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:41,909 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:41,910 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 123 flow. Second operand 4 states and 517 transitions. [2023-11-12 02:21:41,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 75 transitions, 426 flow [2023-11-12 02:21:41,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 75 transitions, 401 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:41,963 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 146 flow [2023-11-12 02:21:41,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-12 02:21:41,964 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-12 02:21:41,965 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 146 flow [2023-11-12 02:21:41,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:41,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:41,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:41,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:21:41,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:41,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:41,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1973834413, now seen corresponding path program 1 times [2023-11-12 02:21:41,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:41,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124848231] [2023-11-12 02:21:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:41,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:42,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:42,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124848231] [2023-11-12 02:21:42,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124848231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:42,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:42,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:42,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440646200] [2023-11-12 02:21:42,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:42,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:42,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:42,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:42,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:42,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:42,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:42,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:42,781 INFO L124 PetriNetUnfolderBase]: 2950/4138 cut-off events. [2023-11-12 02:21:42,781 INFO L125 PetriNetUnfolderBase]: For 5226/5226 co-relation queries the response was YES. [2023-11-12 02:21:42,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12913 conditions, 4138 events. 2950/4138 cut-off events. For 5226/5226 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17809 event pairs, 894 based on Foata normal form. 122/4260 useless extension candidates. Maximal degree in co-relation 3695. Up to 2752 conditions per place. [2023-11-12 02:21:42,817 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 61 selfloop transitions, 4 changer transitions 10/75 dead transitions. [2023-11-12 02:21:42,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 75 transitions, 443 flow [2023-11-12 02:21:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-11-12 02:21:42,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351239669421488 [2023-11-12 02:21:42,821 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-11-12 02:21:42,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-11-12 02:21:42,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:42,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-11-12 02:21:42,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 02:21:42,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:42,828 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:42,828 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 146 flow. Second operand 4 states and 518 transitions. [2023-11-12 02:21:42,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 75 transitions, 443 flow [2023-11-12 02:21:42,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 75 transitions, 434 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:42,834 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 174 flow [2023-11-12 02:21:42,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-11-12 02:21:42,835 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-12 02:21:42,836 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 174 flow [2023-11-12 02:21:42,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:42,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:42,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:21:42,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:42,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1930217321, now seen corresponding path program 2 times [2023-11-12 02:21:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:42,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949277234] [2023-11-12 02:21:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:43,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:43,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949277234] [2023-11-12 02:21:43,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949277234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:43,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:43,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:21:43,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818008115] [2023-11-12 02:21:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:43,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:21:43,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:21:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:43,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 242 [2023-11-12 02:21:43,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 02:21:43,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:43,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 242 [2023-11-12 02:21:43,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:43,705 INFO L124 PetriNetUnfolderBase]: 3092/4328 cut-off events. [2023-11-12 02:21:43,706 INFO L125 PetriNetUnfolderBase]: For 9045/9045 co-relation queries the response was YES. [2023-11-12 02:21:43,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14437 conditions, 4328 events. 3092/4328 cut-off events. For 9045/9045 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18254 event pairs, 1835 based on Foata normal form. 16/4344 useless extension candidates. Maximal degree in co-relation 6276. Up to 3580 conditions per place. [2023-11-12 02:21:43,756 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 57 selfloop transitions, 7 changer transitions 11/75 dead transitions. [2023-11-12 02:21:43,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 490 flow [2023-11-12 02:21:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:21:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2023-11-12 02:21:43,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016528925619834 [2023-11-12 02:21:43,760 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2023-11-12 02:21:43,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2023-11-12 02:21:43,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:43,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2023-11-12 02:21:43,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 02:21:43,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:21:43,768 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:21:43,769 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 174 flow. Second operand 5 states and 607 transitions. [2023-11-12 02:21:43,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 490 flow [2023-11-12 02:21:43,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 483 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:43,781 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 223 flow [2023-11-12 02:21:43,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-11-12 02:21:43,784 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-11-12 02:21:43,785 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 223 flow [2023-11-12 02:21:43,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 02:21:43,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:43,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:43,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:21:43,786 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:43,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1822124311, now seen corresponding path program 3 times [2023-11-12 02:21:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:43,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977144491] [2023-11-12 02:21:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:43,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:43,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977144491] [2023-11-12 02:21:43,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977144491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:43,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:43,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:43,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613208143] [2023-11-12 02:21:43,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:43,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:43,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:43,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:43,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:43,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:43,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:43,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:43,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:44,688 INFO L124 PetriNetUnfolderBase]: 3445/4809 cut-off events. [2023-11-12 02:21:44,689 INFO L125 PetriNetUnfolderBase]: For 12587/12587 co-relation queries the response was YES. [2023-11-12 02:21:44,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17490 conditions, 4809 events. 3445/4809 cut-off events. For 12587/12587 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20863 event pairs, 1685 based on Foata normal form. 152/4961 useless extension candidates. Maximal degree in co-relation 8546. Up to 3328 conditions per place. [2023-11-12 02:21:44,726 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 71 selfloop transitions, 13 changer transitions 1/85 dead transitions. [2023-11-12 02:21:44,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 665 flow [2023-11-12 02:21:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-11-12 02:21:44,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299586776859504 [2023-11-12 02:21:44,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-11-12 02:21:44,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-11-12 02:21:44,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:44,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-11-12 02:21:44,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 02:21:44,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:44,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:44,735 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 223 flow. Second operand 4 states and 513 transitions. [2023-11-12 02:21:44,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 85 transitions, 665 flow [2023-11-12 02:21:44,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 631 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:44,755 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 354 flow [2023-11-12 02:21:44,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-12 02:21:44,757 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-11-12 02:21:44,758 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 354 flow [2023-11-12 02:21:44,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:44,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:44,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:44,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:21:44,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:44,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash 788699484, now seen corresponding path program 3 times [2023-11-12 02:21:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675166693] [2023-11-12 02:21:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675166693] [2023-11-12 02:21:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675166693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:44,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:44,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075061073] [2023-11-12 02:21:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:44,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:44,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:44,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:44,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:44,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:44,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:45,681 INFO L124 PetriNetUnfolderBase]: 3741/5201 cut-off events. [2023-11-12 02:21:45,681 INFO L125 PetriNetUnfolderBase]: For 18058/18058 co-relation queries the response was YES. [2023-11-12 02:21:45,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20941 conditions, 5201 events. 3741/5201 cut-off events. For 18058/18058 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22594 event pairs, 2003 based on Foata normal form. 96/5297 useless extension candidates. Maximal degree in co-relation 9618. Up to 4138 conditions per place. [2023-11-12 02:21:45,726 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 68 selfloop transitions, 21 changer transitions 1/90 dead transitions. [2023-11-12 02:21:45,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 90 transitions, 808 flow [2023-11-12 02:21:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-11-12 02:21:45,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247933884297521 [2023-11-12 02:21:45,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-11-12 02:21:45,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-11-12 02:21:45,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:45,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-11-12 02:21:45,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 02:21:45,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:45,738 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:45,738 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 354 flow. Second operand 4 states and 508 transitions. [2023-11-12 02:21:45,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 90 transitions, 808 flow [2023-11-12 02:21:45,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 90 transitions, 754 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:45,782 INFO L231 Difference]: Finished difference. Result has 53 places, 61 transitions, 514 flow [2023-11-12 02:21:45,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=514, PETRI_PLACES=53, PETRI_TRANSITIONS=61} [2023-11-12 02:21:45,783 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-11-12 02:21:45,783 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 514 flow [2023-11-12 02:21:45,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:45,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:45,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:45,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:21:45,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:45,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 605445178, now seen corresponding path program 4 times [2023-11-12 02:21:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119483472] [2023-11-12 02:21:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:45,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:45,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119483472] [2023-11-12 02:21:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119483472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:45,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807103721] [2023-11-12 02:21:45,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:45,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:45,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:45,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:45,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 514 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:45,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:45,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:45,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:46,644 INFO L124 PetriNetUnfolderBase]: 3677/5025 cut-off events. [2023-11-12 02:21:46,645 INFO L125 PetriNetUnfolderBase]: For 17378/17378 co-relation queries the response was YES. [2023-11-12 02:21:46,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21758 conditions, 5025 events. 3677/5025 cut-off events. For 17378/17378 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21605 event pairs, 1031 based on Foata normal form. 96/5121 useless extension candidates. Maximal degree in co-relation 9766. Up to 3366 conditions per place. [2023-11-12 02:21:46,690 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 74 selfloop transitions, 15 changer transitions 10/99 dead transitions. [2023-11-12 02:21:46,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 908 flow [2023-11-12 02:21:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2023-11-12 02:21:46,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53099173553719 [2023-11-12 02:21:46,693 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2023-11-12 02:21:46,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2023-11-12 02:21:46,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:46,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2023-11-12 02:21:46,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 02:21:46,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:46,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:46,699 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 514 flow. Second operand 4 states and 514 transitions. [2023-11-12 02:21:46,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 908 flow [2023-11-12 02:21:46,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 895 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:46,720 INFO L231 Difference]: Finished difference. Result has 57 places, 63 transitions, 577 flow [2023-11-12 02:21:46,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=577, PETRI_PLACES=57, PETRI_TRANSITIONS=63} [2023-11-12 02:21:46,721 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-11-12 02:21:46,721 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 63 transitions, 577 flow [2023-11-12 02:21:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:46,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:46,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:46,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:21:46,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:46,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash 364262899, now seen corresponding path program 4 times [2023-11-12 02:21:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:46,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950901357] [2023-11-12 02:21:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:46,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:46,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950901357] [2023-11-12 02:21:46,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950901357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:46,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:46,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:21:46,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560003320] [2023-11-12 02:21:46,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:46,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:21:46,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:21:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:46,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 242 [2023-11-12 02:21:46,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 02:21:46,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:46,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 242 [2023-11-12 02:21:46,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:47,798 INFO L124 PetriNetUnfolderBase]: 3975/5332 cut-off events. [2023-11-12 02:21:47,798 INFO L125 PetriNetUnfolderBase]: For 25938/25938 co-relation queries the response was YES. [2023-11-12 02:21:47,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23920 conditions, 5332 events. 3975/5332 cut-off events. For 25938/25938 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21653 event pairs, 1555 based on Foata normal form. 16/5348 useless extension candidates. Maximal degree in co-relation 18644. Up to 4009 conditions per place. [2023-11-12 02:21:47,858 INFO L140 encePairwiseOnDemand]: 237/242 looper letters, 78 selfloop transitions, 17 changer transitions 9/104 dead transitions. [2023-11-12 02:21:47,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 104 transitions, 1020 flow [2023-11-12 02:21:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:21:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2023-11-12 02:21:47,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-12 02:21:47,862 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2023-11-12 02:21:47,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2023-11-12 02:21:47,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:47,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2023-11-12 02:21:47,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 02:21:47,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:21:47,869 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:21:47,869 INFO L175 Difference]: Start difference. First operand has 57 places, 63 transitions, 577 flow. Second operand 5 states and 605 transitions. [2023-11-12 02:21:47,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 104 transitions, 1020 flow [2023-11-12 02:21:47,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 104 transitions, 1006 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:47,903 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 708 flow [2023-11-12 02:21:47,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=708, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2023-11-12 02:21:47,904 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2023-11-12 02:21:47,904 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 708 flow [2023-11-12 02:21:47,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 02:21:47,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:47,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:47,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:21:47,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:47,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1060337343, now seen corresponding path program 5 times [2023-11-12 02:21:47,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:47,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001937029] [2023-11-12 02:21:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:47,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:48,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001937029] [2023-11-12 02:21:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001937029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:48,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371246864] [2023-11-12 02:21:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:48,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:48,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:48,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:48,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 708 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:48,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:48,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:48,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:48,827 INFO L124 PetriNetUnfolderBase]: 4082/5575 cut-off events. [2023-11-12 02:21:48,827 INFO L125 PetriNetUnfolderBase]: For 33245/33245 co-relation queries the response was YES. [2023-11-12 02:21:48,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26558 conditions, 5575 events. 4082/5575 cut-off events. For 33245/33245 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 23908 event pairs, 1597 based on Foata normal form. 156/5731 useless extension candidates. Maximal degree in co-relation 21047. Up to 3715 conditions per place. [2023-11-12 02:21:48,885 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 92 selfloop transitions, 14 changer transitions 1/107 dead transitions. [2023-11-12 02:21:48,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 107 transitions, 1094 flow [2023-11-12 02:21:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-11-12 02:21:48,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320247933884298 [2023-11-12 02:21:48,888 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-11-12 02:21:48,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-11-12 02:21:48,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:48,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-11-12 02:21:48,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states 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 02:21:48,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:48,894 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:48,894 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 708 flow. Second operand 4 states and 515 transitions. [2023-11-12 02:21:48,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 107 transitions, 1094 flow [2023-11-12 02:21:48,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 107 transitions, 1056 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:48,956 INFO L231 Difference]: Finished difference. Result has 63 places, 69 transitions, 717 flow [2023-11-12 02:21:48,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=717, PETRI_PLACES=63, PETRI_TRANSITIONS=69} [2023-11-12 02:21:48,958 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-11-12 02:21:48,958 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 69 transitions, 717 flow [2023-11-12 02:21:48,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:48,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:48,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:21:48,961 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash 540527041, now seen corresponding path program 6 times [2023-11-12 02:21:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262366062] [2023-11-12 02:21:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:49,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:49,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262366062] [2023-11-12 02:21:49,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262366062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:49,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:49,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:49,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962224599] [2023-11-12 02:21:49,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:49,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:49,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 69 transitions, 717 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:49,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:49,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:49,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:50,185 INFO L124 PetriNetUnfolderBase]: 5628/7817 cut-off events. [2023-11-12 02:21:50,185 INFO L125 PetriNetUnfolderBase]: For 61203/61203 co-relation queries the response was YES. [2023-11-12 02:21:50,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37704 conditions, 7817 events. 5628/7817 cut-off events. For 61203/61203 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36670 event pairs, 2212 based on Foata normal form. 408/8225 useless extension candidates. Maximal degree in co-relation 30041. Up to 5172 conditions per place. [2023-11-12 02:21:50,254 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 136 selfloop transitions, 6 changer transitions 6/148 dead transitions. [2023-11-12 02:21:50,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 148 transitions, 1837 flow [2023-11-12 02:21:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-11-12 02:21:50,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299586776859504 [2023-11-12 02:21:50,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-11-12 02:21:50,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-11-12 02:21:50,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:50,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-11-12 02:21:50,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 02:21:50,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:50,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:50,264 INFO L175 Difference]: Start difference. First operand has 63 places, 69 transitions, 717 flow. Second operand 4 states and 513 transitions. [2023-11-12 02:21:50,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 148 transitions, 1837 flow [2023-11-12 02:21:50,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 148 transitions, 1770 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:50,317 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 839 flow [2023-11-12 02:21:50,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=839, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-11-12 02:21:50,318 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2023-11-12 02:21:50,319 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 839 flow [2023-11-12 02:21:50,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:50,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:50,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:50,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:21:50,320 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:50,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:50,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1304390355, now seen corresponding path program 7 times [2023-11-12 02:21:50,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:50,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147684007] [2023-11-12 02:21:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:50,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147684007] [2023-11-12 02:21:50,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147684007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:50,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:50,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050727864] [2023-11-12 02:21:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:50,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:50,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:50,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:50,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 839 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:50,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:50,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:50,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:51,671 INFO L124 PetriNetUnfolderBase]: 5798/7899 cut-off events. [2023-11-12 02:21:51,671 INFO L125 PetriNetUnfolderBase]: For 55485/55485 co-relation queries the response was YES. [2023-11-12 02:21:51,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43330 conditions, 7899 events. 5798/7899 cut-off events. For 55485/55485 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 35825 event pairs, 1726 based on Foata normal form. 304/8203 useless extension candidates. Maximal degree in co-relation 34045. Up to 5244 conditions per place. [2023-11-12 02:21:51,750 INFO L140 encePairwiseOnDemand]: 237/242 looper letters, 92 selfloop transitions, 17 changer transitions 5/114 dead transitions. [2023-11-12 02:21:51,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 114 transitions, 1400 flow [2023-11-12 02:21:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 511 transitions. [2023-11-12 02:21:51,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5278925619834711 [2023-11-12 02:21:51,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 511 transitions. [2023-11-12 02:21:51,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 511 transitions. [2023-11-12 02:21:51,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:51,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 511 transitions. [2023-11-12 02:21:51,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 02:21:51,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:51,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:51,761 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 839 flow. Second operand 4 states and 511 transitions. [2023-11-12 02:21:51,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 114 transitions, 1400 flow [2023-11-12 02:21:51,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 114 transitions, 1331 flow, removed 30 selfloop flow, removed 1 redundant places. [2023-11-12 02:21:51,833 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 885 flow [2023-11-12 02:21:51,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=885, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-11-12 02:21:51,834 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-11-12 02:21:51,834 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 885 flow [2023-11-12 02:21:51,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 02:21:51,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:51,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:51,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:21:51,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:51,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash -949528942, now seen corresponding path program 1 times [2023-11-12 02:21:51,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:51,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596425403] [2023-11-12 02:21:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:51,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:51,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596425403] [2023-11-12 02:21:51,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596425403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380591544] [2023-11-12 02:21:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:51,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:52,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:52,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:21:52,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:52,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:52,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380591544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:52,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:52,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-12 02:21:52,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748962240] [2023-11-12 02:21:52,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:52,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:52,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:52,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 242 [2023-11-12 02:21:52,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 885 flow. Second operand has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 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 02:21:52,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:52,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 242 [2023-11-12 02:21:52,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:53,864 INFO L124 PetriNetUnfolderBase]: 7249/9860 cut-off events. [2023-11-12 02:21:53,864 INFO L125 PetriNetUnfolderBase]: For 76396/76396 co-relation queries the response was YES. [2023-11-12 02:21:53,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54003 conditions, 9860 events. 7249/9860 cut-off events. For 76396/76396 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46125 event pairs, 2563 based on Foata normal form. 214/10074 useless extension candidates. Maximal degree in co-relation 44996. Up to 5955 conditions per place. [2023-11-12 02:21:53,974 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 160 selfloop transitions, 34 changer transitions 7/201 dead transitions. [2023-11-12 02:21:53,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 201 transitions, 2364 flow [2023-11-12 02:21:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:21:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:21:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 979 transitions. [2023-11-12 02:21:53,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2023-11-12 02:21:53,979 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 979 transitions. [2023-11-12 02:21:53,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 979 transitions. [2023-11-12 02:21:53,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:53,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 979 transitions. [2023-11-12 02:21:53,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.375) internal successors, (979), 8 states have internal predecessors, (979), 0 states have call successors, (0), 0 states 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 02:21:53,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states 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 02:21:53,990 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 242.0) internal successors, (2178), 9 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states 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 02:21:53,990 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 885 flow. Second operand 8 states and 979 transitions. [2023-11-12 02:21:53,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 201 transitions, 2364 flow [2023-11-12 02:21:54,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 201 transitions, 2340 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:54,079 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 1117 flow [2023-11-12 02:21:54,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1117, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2023-11-12 02:21:54,080 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-11-12 02:21:54,080 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 1117 flow [2023-11-12 02:21:54,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 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 02:21:54,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:54,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:54,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:54,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:21:54,287 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 2 more)] === [2023-11-12 02:21:54,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2010425236, now seen corresponding path program 2 times [2023-11-12 02:21:54,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:54,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923228956] [2023-11-12 02:21:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:54,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923228956] [2023-11-12 02:21:54,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923228956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149162690] [2023-11-12 02:21:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:21:54,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:54,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:54,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:54,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:54,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:21:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:21:54,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:21:54,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:54,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:21:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149162690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:54,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-11-12 02:21:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978020803] [2023-11-12 02:21:54,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:21:54,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:21:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:54,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 242 [2023-11-12 02:21:54,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 1117 flow. Second operand has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 02:21:54,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:54,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 242 [2023-11-12 02:21:54,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:56,484 INFO L124 PetriNetUnfolderBase]: 7375/9938 cut-off events. [2023-11-12 02:21:56,485 INFO L125 PetriNetUnfolderBase]: For 89649/89649 co-relation queries the response was YES. [2023-11-12 02:21:56,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59633 conditions, 9938 events. 7375/9938 cut-off events. For 89649/89649 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 45927 event pairs, 1477 based on Foata normal form. 214/10152 useless extension candidates. Maximal degree in co-relation 52686. Up to 4499 conditions per place. [2023-11-12 02:21:56,710 INFO L140 encePairwiseOnDemand]: 234/242 looper letters, 135 selfloop transitions, 70 changer transitions 7/212 dead transitions. [2023-11-12 02:21:56,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 212 transitions, 2620 flow [2023-11-12 02:21:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:21:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:21:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1066 transitions. [2023-11-12 02:21:56,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48943985307621674 [2023-11-12 02:21:56,717 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1066 transitions. [2023-11-12 02:21:56,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1066 transitions. [2023-11-12 02:21:56,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:56,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1066 transitions. [2023-11-12 02:21:56,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.44444444444444) internal successors, (1066), 9 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states 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 02:21:56,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states 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 02:21:56,727 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states 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 02:21:56,727 INFO L175 Difference]: Start difference. First operand has 77 places, 88 transitions, 1117 flow. Second operand 9 states and 1066 transitions. [2023-11-12 02:21:56,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 212 transitions, 2620 flow [2023-11-12 02:21:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 212 transitions, 2440 flow, removed 61 selfloop flow, removed 5 redundant places. [2023-11-12 02:21:56,887 INFO L231 Difference]: Finished difference. Result has 81 places, 123 transitions, 1691 flow [2023-11-12 02:21:56,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1691, PETRI_PLACES=81, PETRI_TRANSITIONS=123} [2023-11-12 02:21:56,888 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2023-11-12 02:21:56,888 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 123 transitions, 1691 flow [2023-11-12 02:21:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 02:21:56,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:56,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:56,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:57,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:57,096 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:57,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1005377771, now seen corresponding path program 1 times [2023-11-12 02:21:57,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:57,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57400276] [2023-11-12 02:21:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:57,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:57,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57400276] [2023-11-12 02:21:57,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57400276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:57,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575209137] [2023-11-12 02:21:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:57,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:57,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:57,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:57,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:21:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:57,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:21:57,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:57,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:57,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575209137] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:57,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:21:57,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-12 02:21:57,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13273282] [2023-11-12 02:21:57,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:57,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:57,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:21:57,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:21:57,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 123 transitions, 1691 flow. Second operand has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 02:21:57,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:21:57,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:21:57,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:21:59,205 INFO L124 PetriNetUnfolderBase]: 8721/11698 cut-off events. [2023-11-12 02:21:59,206 INFO L125 PetriNetUnfolderBase]: For 123344/123344 co-relation queries the response was YES. [2023-11-12 02:21:59,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73667 conditions, 11698 events. 8721/11698 cut-off events. For 123344/123344 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 54442 event pairs, 2163 based on Foata normal form. 414/12112 useless extension candidates. Maximal degree in co-relation 64956. Up to 9720 conditions per place. [2023-11-12 02:21:59,312 INFO L140 encePairwiseOnDemand]: 237/242 looper letters, 187 selfloop transitions, 20 changer transitions 1/208 dead transitions. [2023-11-12 02:21:59,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 208 transitions, 3199 flow [2023-11-12 02:21:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:21:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-11-12 02:21:59,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258264462809917 [2023-11-12 02:21:59,316 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-11-12 02:21:59,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-11-12 02:21:59,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:21:59,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-11-12 02:21:59,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 02:21:59,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:59,323 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:21:59,323 INFO L175 Difference]: Start difference. First operand has 81 places, 123 transitions, 1691 flow. Second operand 4 states and 509 transitions. [2023-11-12 02:21:59,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 208 transitions, 3199 flow [2023-11-12 02:21:59,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 208 transitions, 3041 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-11-12 02:21:59,456 INFO L231 Difference]: Finished difference. Result has 84 places, 131 transitions, 1761 flow [2023-11-12 02:21:59,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1761, PETRI_PLACES=84, PETRI_TRANSITIONS=131} [2023-11-12 02:21:59,457 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 46 predicate places. [2023-11-12 02:21:59,457 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 131 transitions, 1761 flow [2023-11-12 02:21:59,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 02:21:59,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:21:59,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:59,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:59,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:21:59,665 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:21:59,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash 99986775, now seen corresponding path program 2 times [2023-11-12 02:21:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:59,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603077530] [2023-11-12 02:21:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:59,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603077530] [2023-11-12 02:21:59,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603077530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902864470] [2023-11-12 02:21:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:21:59,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:59,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:59,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:59,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:22:00,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:22:00,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:00,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:00,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:00,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:00,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902864470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:00,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:00,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-12 02:22:00,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692231272] [2023-11-12 02:22:00,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:00,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:22:00,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:22:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:22:00,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 242 [2023-11-12 02:22:00,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 131 transitions, 1761 flow. Second operand has 7 states, 7 states have (on average 114.57142857142857) internal successors, (802), 7 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 02:22:00,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:00,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 242 [2023-11-12 02:22:00,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:02,569 INFO L124 PetriNetUnfolderBase]: 12169/16246 cut-off events. [2023-11-12 02:22:02,570 INFO L125 PetriNetUnfolderBase]: For 185394/185394 co-relation queries the response was YES. [2023-11-12 02:22:02,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107450 conditions, 16246 events. 12169/16246 cut-off events. For 185394/185394 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 78431 event pairs, 3037 based on Foata normal form. 342/16588 useless extension candidates. Maximal degree in co-relation 93178. Up to 9981 conditions per place. [2023-11-12 02:22:02,732 INFO L140 encePairwiseOnDemand]: 234/242 looper letters, 350 selfloop transitions, 100 changer transitions 3/453 dead transitions. [2023-11-12 02:22:02,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 453 transitions, 7015 flow [2023-11-12 02:22:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:22:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:22:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1096 transitions. [2023-11-12 02:22:02,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032139577594124 [2023-11-12 02:22:02,737 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1096 transitions. [2023-11-12 02:22:02,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1096 transitions. [2023-11-12 02:22:02,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:02,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1096 transitions. [2023-11-12 02:22:02,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.77777777777777) internal successors, (1096), 9 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states 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 02:22:02,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states 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 02:22:02,749 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states 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 02:22:02,750 INFO L175 Difference]: Start difference. First operand has 84 places, 131 transitions, 1761 flow. Second operand 9 states and 1096 transitions. [2023-11-12 02:22:02,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 453 transitions, 7015 flow [2023-11-12 02:22:03,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 453 transitions, 6991 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:03,154 INFO L231 Difference]: Finished difference. Result has 96 places, 217 transitions, 3467 flow [2023-11-12 02:22:03,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3467, PETRI_PLACES=96, PETRI_TRANSITIONS=217} [2023-11-12 02:22:03,154 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-11-12 02:22:03,154 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 217 transitions, 3467 flow [2023-11-12 02:22:03,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.57142857142857) internal successors, (802), 7 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 02:22:03,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:03,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:03,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:22:03,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:22:03,360 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:22:03,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:03,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1617420985, now seen corresponding path program 3 times [2023-11-12 02:22:03,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:03,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077731695] [2023-11-12 02:22:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:03,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:03,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077731695] [2023-11-12 02:22:03,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077731695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:03,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678102211] [2023-11-12 02:22:03,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:22:03,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:03,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:03,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:03,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:22:03,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:22:03,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:03,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:22:03,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:03,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:03,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678102211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:03,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:22:03,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-12 02:22:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716055719] [2023-11-12 02:22:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:03,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:03,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:03,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 242 [2023-11-12 02:22:03,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 217 transitions, 3467 flow. Second operand has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 02:22:03,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:03,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 242 [2023-11-12 02:22:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:06,442 INFO L124 PetriNetUnfolderBase]: 12529/16526 cut-off events. [2023-11-12 02:22:06,442 INFO L125 PetriNetUnfolderBase]: For 242349/242349 co-relation queries the response was YES. [2023-11-12 02:22:06,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122431 conditions, 16526 events. 12529/16526 cut-off events. For 242349/242349 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 77150 event pairs, 2677 based on Foata normal form. 390/16916 useless extension candidates. Maximal degree in co-relation 115974. Up to 9329 conditions per place. [2023-11-12 02:22:06,600 INFO L140 encePairwiseOnDemand]: 236/242 looper letters, 225 selfloop transitions, 149 changer transitions 1/375 dead transitions. [2023-11-12 02:22:06,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 375 transitions, 6596 flow [2023-11-12 02:22:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-11-12 02:22:06,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299586776859504 [2023-11-12 02:22:06,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-11-12 02:22:06,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-11-12 02:22:06,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:06,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-11-12 02:22:06,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 02:22:06,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:22:06,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 02:22:06,609 INFO L175 Difference]: Start difference. First operand has 96 places, 217 transitions, 3467 flow. Second operand 4 states and 513 transitions. [2023-11-12 02:22:06,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 375 transitions, 6596 flow [2023-11-12 02:22:07,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 375 transitions, 6192 flow, removed 202 selfloop flow, removed 0 redundant places. [2023-11-12 02:22:07,033 INFO L231 Difference]: Finished difference. Result has 100 places, 281 transitions, 4861 flow [2023-11-12 02:22:07,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4861, PETRI_PLACES=100, PETRI_TRANSITIONS=281} [2023-11-12 02:22:07,034 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2023-11-12 02:22:07,034 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 281 transitions, 4861 flow [2023-11-12 02:22:07,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 02:22:07,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:07,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:07,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:07,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:22:07,241 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:22:07,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:07,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1592594121, now seen corresponding path program 1 times [2023-11-12 02:22:07,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:07,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985945879] [2023-11-12 02:22:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:07,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:07,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:07,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985945879] [2023-11-12 02:22:07,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985945879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:07,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970488024] [2023-11-12 02:22:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:07,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:07,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:07,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:07,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:22:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:07,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:22:07,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:07,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:07,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970488024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:07,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:07,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:22:07,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318030362] [2023-11-12 02:22:07,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:07,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:22:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:22:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:22:08,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 242 [2023-11-12 02:22:08,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 281 transitions, 4861 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states 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 02:22:08,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:08,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 242 [2023-11-12 02:22:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:13,853 INFO L124 PetriNetUnfolderBase]: 24284/32858 cut-off events. [2023-11-12 02:22:13,853 INFO L125 PetriNetUnfolderBase]: For 487111/487111 co-relation queries the response was YES. [2023-11-12 02:22:13,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235608 conditions, 32858 events. 24284/32858 cut-off events. For 487111/487111 co-relation queries the response was YES. Maximal size of possible extension queue 1435. Compared 183037 event pairs, 4165 based on Foata normal form. 2599/35457 useless extension candidates. Maximal degree in co-relation 227511. Up to 18727 conditions per place. [2023-11-12 02:22:14,336 INFO L140 encePairwiseOnDemand]: 235/242 looper letters, 320 selfloop transitions, 262 changer transitions 3/585 dead transitions. [2023-11-12 02:22:14,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 585 transitions, 10471 flow [2023-11-12 02:22:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:22:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-11-12 02:22:14,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495867768595041 [2023-11-12 02:22:14,340 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-11-12 02:22:14,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-11-12 02:22:14,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:14,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-11-12 02:22:14,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states 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 02:22:14,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:22:14,348 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states 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 02:22:14,349 INFO L175 Difference]: Start difference. First operand has 100 places, 281 transitions, 4861 flow. Second operand 5 states and 665 transitions. [2023-11-12 02:22:14,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 585 transitions, 10471 flow [2023-11-12 02:22:16,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 585 transitions, 10157 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-11-12 02:22:16,434 INFO L231 Difference]: Finished difference. Result has 102 places, 502 transitions, 9854 flow [2023-11-12 02:22:16,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9854, PETRI_PLACES=102, PETRI_TRANSITIONS=502} [2023-11-12 02:22:16,434 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 64 predicate places. [2023-11-12 02:22:16,435 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 502 transitions, 9854 flow [2023-11-12 02:22:16,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states 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 02:22:16,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:16,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:16,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:16,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:22:16,643 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:22:16,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2042408733, now seen corresponding path program 2 times [2023-11-12 02:22:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431359338] [2023-11-12 02:22:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:16,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431359338] [2023-11-12 02:22:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431359338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50560065] [2023-11-12 02:22:16,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:22:16,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:16,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:16,890 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:16,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45f70530-adff-400c-9dd4-8f942ae704bc/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:22:17,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:22:17,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:17,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:22:17,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:17,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50560065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:17,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:17,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 10 [2023-11-12 02:22:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234345293] [2023-11-12 02:22:17,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:17,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:22:17,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:22:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:22:17,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 242 [2023-11-12 02:22:17,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 502 transitions, 9854 flow. Second operand has 12 states, 12 states have (on average 113.75) internal successors, (1365), 12 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 02:22:17,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:17,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 242 [2023-11-12 02:22:17,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand