./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/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_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/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_03e5fa48-3c20-48a5-90a2-b3fac7059d43/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 e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:33:06,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:33:06,289 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:33:06,298 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:33:06,300 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:33:06,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:33:06,363 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:33:06,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:33:06,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:33:06,371 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:33:06,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:33:06,373 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:33:06,374 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:33:06,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:33:06,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:33:06,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:33:06,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:33:06,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:33:06,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:33:06,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:33:06,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:33:06,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:33:06,381 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:33:06,382 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:33:06,382 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:33:06,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:33:06,384 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:33:06,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:33:06,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:06,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:33:06,404 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:33:06,404 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:33:06,405 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:33:06,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:33:06,405 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:33:06,406 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:33:06,406 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:33:06,406 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:33:06,407 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:33:06,407 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_03e5fa48-3c20-48a5-90a2-b3fac7059d43/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-12 02:33:06,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:33:06,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:33:06,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:33:06,809 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:33:06,810 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:33:06,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-12 02:33:10,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:33:10,273 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:33:10,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-12 02:33:10,287 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/data/2462b8562/988ad99aa1c34dcf912233c2a91cacf8/FLAG9176221fa [2023-11-12 02:33:10,308 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/data/2462b8562/988ad99aa1c34dcf912233c2a91cacf8 [2023-11-12 02:33:10,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:33:10,319 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:33:10,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:10,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:33:10,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:33:10,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@abd97b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10, skipping insertion in model container [2023-11-12 02:33:10,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,371 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:33:10,646 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_03e5fa48-3c20-48a5-90a2-b3fac7059d43/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-12 02:33:10,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:10,684 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:33:10,712 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_03e5fa48-3c20-48a5-90a2-b3fac7059d43/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-12 02:33:10,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:10,725 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:33:10,725 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:33:10,736 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:33:10,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10 WrapperNode [2023-11-12 02:33:10,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:10,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:10,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:33:10,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:33:10,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,801 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 125 [2023-11-12 02:33:10,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:10,802 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:33:10,802 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:33:10,802 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:33:10,813 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:33:10,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:33:10,840 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:33:10,840 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:33:10,841 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (1/1) ... [2023-11-12 02:33:10,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:10,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:33:10,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:33:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:33:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:33:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:33:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:33:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:33:10,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:33:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:33:10,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:33:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:33:10,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:33:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:33:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:33:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:33:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:33:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:33:10,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:33:10,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:33:10,939 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 02:33:11,066 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:33:11,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:33:11,626 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:33:11,684 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:33:11,684 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 02:33:11,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:11 BoogieIcfgContainer [2023-11-12 02:33:11,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:33:11,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:33:11,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:33:11,698 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:33:11,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:33:10" (1/3) ... [2023-11-12 02:33:11,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1def15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:11, skipping insertion in model container [2023-11-12 02:33:11,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:10" (2/3) ... [2023-11-12 02:33:11,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1def15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:11, skipping insertion in model container [2023-11-12 02:33:11,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:11" (3/3) ... [2023-11-12 02:33:11,705 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-12 02:33:11,715 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:33:11,726 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:33:11,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:33:11,727 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:33:11,865 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:33:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 193 transitions, 407 flow [2023-11-12 02:33:12,135 INFO L124 PetriNetUnfolderBase]: 16/190 cut-off events. [2023-11-12 02:33:12,135 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:33:12,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 190 events. 16/190 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-11-12 02:33:12,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 193 transitions, 407 flow [2023-11-12 02:33:12,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 179 transitions, 376 flow [2023-11-12 02:33:12,167 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:33:12,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 179 transitions, 376 flow [2023-11-12 02:33:12,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 179 transitions, 376 flow [2023-11-12 02:33:12,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 179 transitions, 376 flow [2023-11-12 02:33:12,289 INFO L124 PetriNetUnfolderBase]: 16/179 cut-off events. [2023-11-12 02:33:12,290 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:33:12,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 179 events. 16/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 138 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-11-12 02:33:12,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 2176 [2023-11-12 02:33:19,536 INFO L134 LiptonReduction]: Checked pairs total: 2749 [2023-11-12 02:33:19,536 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-11-12 02:33:19,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:19,558 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;@54fb286b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:19,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:33:19,566 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:33:19,566 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-12 02:33:19,566 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:33:19,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:19,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:19,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:19,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash -720217116, now seen corresponding path program 1 times [2023-11-12 02:33:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:19,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070387588] [2023-11-12 02:33:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:19,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:20,842 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 02:33:20,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:20,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070387588] [2023-11-12 02:33:20,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070387588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:20,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:20,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:20,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520796258] [2023-11-12 02:33:20,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:20,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:20,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:20,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:21,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-11-12 02:33:21,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 02:33:21,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:21,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-11-12 02:33:21,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:21,553 INFO L124 PetriNetUnfolderBase]: 806/1148 cut-off events. [2023-11-12 02:33:21,554 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-12 02:33:21,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2407 conditions, 1148 events. 806/1148 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3749 event pairs, 506 based on Foata normal form. 1/848 useless extension candidates. Maximal degree in co-relation 918. Up to 651 conditions per place. [2023-11-12 02:33:21,571 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 50 selfloop transitions, 7 changer transitions 1/58 dead transitions. [2023-11-12 02:33:21,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 268 flow [2023-11-12 02:33:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:33:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:33:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-11-12 02:33:21,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474666666666667 [2023-11-12 02:33:21,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-11-12 02:33:21,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-11-12 02:33:21,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:21,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-11-12 02:33:21,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 02:33:21,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:21,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:21,635 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 5 states and 839 transitions. [2023-11-12 02:33:21,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 268 flow [2023-11-12 02:33:21,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 58 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:33:21,646 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 114 flow [2023-11-12 02:33:21,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-11-12 02:33:21,653 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-11-12 02:33:21,653 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 114 flow [2023-11-12 02:33:21,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states 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 02:33:21,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:21,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:21,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:33:21,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:21,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1799376802, now seen corresponding path program 1 times [2023-11-12 02:33:21,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:21,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348578814] [2023-11-12 02:33:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:21,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:21,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348578814] [2023-11-12 02:33:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348578814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129694249] [2023-11-12 02:33:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:21,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:21,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:21,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:22,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:33:22,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:22,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:22,217 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 02:33:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129694249] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:22,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:22,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-12 02:33:22,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13347782] [2023-11-12 02:33:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:22,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:33:22,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-11-12 02:33:22,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 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 02:33:22,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:22,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-11-12 02:33:22,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:22,858 INFO L124 PetriNetUnfolderBase]: 1568/2229 cut-off events. [2023-11-12 02:33:22,859 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-11-12 02:33:22,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 2229 events. 1568/2229 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8467 event pairs, 1003 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 3733. Up to 1145 conditions per place. [2023-11-12 02:33:22,881 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-11-12 02:33:22,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 62 transitions, 312 flow [2023-11-12 02:33:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:33:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:33:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-11-12 02:33:22,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474666666666667 [2023-11-12 02:33:22,894 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-11-12 02:33:22,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-11-12 02:33:22,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:22,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-11-12 02:33:22,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 02:33:22,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:22,906 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:22,906 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 114 flow. Second operand 5 states and 839 transitions. [2023-11-12 02:33:22,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 62 transitions, 312 flow [2023-11-12 02:33:22,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 302 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:22,911 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 128 flow [2023-11-12 02:33:22,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-12 02:33:22,912 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-11-12 02:33:22,913 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 128 flow [2023-11-12 02:33:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 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 02:33:22,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:22,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:22,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:23,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:23,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:23,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 485019938, now seen corresponding path program 1 times [2023-11-12 02:33:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:23,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370691686] [2023-11-12 02:33:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:23,368 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 02:33:23,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:23,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370691686] [2023-11-12 02:33:23,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370691686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:23,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:23,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:33:23,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867059676] [2023-11-12 02:33:23,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:23,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:23,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:23,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 375 [2023-11-12 02:33:23,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 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 02:33:23,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:23,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 375 [2023-11-12 02:33:23,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:23,943 INFO L124 PetriNetUnfolderBase]: 1610/2329 cut-off events. [2023-11-12 02:33:23,943 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-12 02:33:23,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4952 conditions, 2329 events. 1610/2329 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9500 event pairs, 863 based on Foata normal form. 132/1957 useless extension candidates. Maximal degree in co-relation 3683. Up to 1272 conditions per place. [2023-11-12 02:33:23,959 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 66 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2023-11-12 02:33:23,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 75 transitions, 378 flow [2023-11-12 02:33:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1010 transitions. [2023-11-12 02:33:23,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2023-11-12 02:33:23,965 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1010 transitions. [2023-11-12 02:33:23,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1010 transitions. [2023-11-12 02:33:23,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:23,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1010 transitions. [2023-11-12 02:33:23,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states 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 02:33:23,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 02:33:23,978 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 02:33:23,978 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 128 flow. Second operand 6 states and 1010 transitions. [2023-11-12 02:33:23,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 75 transitions, 378 flow [2023-11-12 02:33:23,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 75 transitions, 368 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:23,982 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 148 flow [2023-11-12 02:33:23,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-12 02:33:23,983 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-11-12 02:33:23,983 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 148 flow [2023-11-12 02:33:23,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 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 02:33:23,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:23,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:23,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:33:23,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:23,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash 266958084, now seen corresponding path program 1 times [2023-11-12 02:33:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:23,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537261968] [2023-11-12 02:33:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:24,116 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 02:33:24,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537261968] [2023-11-12 02:33:24,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537261968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:24,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:24,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:33:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552282482] [2023-11-12 02:33:24,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:24,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:24,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:24,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 375 [2023-11-12 02:33:24,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:24,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:24,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 375 [2023-11-12 02:33:24,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:24,737 INFO L124 PetriNetUnfolderBase]: 846/1289 cut-off events. [2023-11-12 02:33:24,737 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2023-11-12 02:33:24,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 1289 events. 846/1289 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4985 event pairs, 387 based on Foata normal form. 0/1121 useless extension candidates. Maximal degree in co-relation 1738. Up to 575 conditions per place. [2023-11-12 02:33:24,747 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 27 selfloop transitions, 4 changer transitions 35/66 dead transitions. [2023-11-12 02:33:24,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 360 flow [2023-11-12 02:33:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1010 transitions. [2023-11-12 02:33:24,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2023-11-12 02:33:24,767 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1010 transitions. [2023-11-12 02:33:24,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1010 transitions. [2023-11-12 02:33:24,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:24,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1010 transitions. [2023-11-12 02:33:24,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states 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 02:33:24,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 02:33:24,783 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 02:33:24,783 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 148 flow. Second operand 6 states and 1010 transitions. [2023-11-12 02:33:24,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 360 flow [2023-11-12 02:33:24,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:33:24,788 INFO L231 Difference]: Finished difference. Result has 48 places, 31 transitions, 117 flow [2023-11-12 02:33:24,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=48, PETRI_TRANSITIONS=31} [2023-11-12 02:33:24,790 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 15 predicate places. [2023-11-12 02:33:24,790 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 31 transitions, 117 flow [2023-11-12 02:33:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.6) internal successors, (808), 5 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:33:24,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:24,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1410631862, now seen corresponding path program 1 times [2023-11-12 02:33:24,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:24,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564075263] [2023-11-12 02:33:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:24,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:24,938 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 02:33:24,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564075263] [2023-11-12 02:33:24,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564075263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13473170] [2023-11-12 02:33:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:24,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:24,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:24,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:24,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:25,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:25,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:25,141 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 02:33:25,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:33:25,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13473170] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:25,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:25,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-12 02:33:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605814578] [2023-11-12 02:33:25,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:25,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:33:25,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-11-12 02:33:25,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 31 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 02:33:25,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:25,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-11-12 02:33:25,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:25,503 INFO L124 PetriNetUnfolderBase]: 509/724 cut-off events. [2023-11-12 02:33:25,504 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-11-12 02:33:25,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 724 events. 509/724 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2162 event pairs, 253 based on Foata normal form. 42/675 useless extension candidates. Maximal degree in co-relation 1889. Up to 575 conditions per place. [2023-11-12 02:33:25,511 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-12 02:33:25,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 253 flow [2023-11-12 02:33:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:33:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:33:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 801 transitions. [2023-11-12 02:33:25,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272 [2023-11-12 02:33:25,515 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 801 transitions. [2023-11-12 02:33:25,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 801 transitions. [2023-11-12 02:33:25,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:25,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 801 transitions. [2023-11-12 02:33:25,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states 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 02:33:25,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:25,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:25,525 INFO L175 Difference]: Start difference. First operand has 48 places, 31 transitions, 117 flow. Second operand 5 states and 801 transitions. [2023-11-12 02:33:25,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 253 flow [2023-11-12 02:33:25,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 215 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-11-12 02:33:25,531 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-11-12 02:33:25,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-12 02:33:25,532 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-11-12 02:33:25,532 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-11-12 02:33:25,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 02:33:25,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:25,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:25,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:25,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:25,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:25,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash -105179540, now seen corresponding path program 1 times [2023-11-12 02:33:25,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:25,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514811837] [2023-11-12 02:33:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:25,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:25,894 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 02:33:25,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:25,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514811837] [2023-11-12 02:33:25,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514811837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:25,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687999243] [2023-11-12 02:33:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:25,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:25,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:25,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:25,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:33:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:26,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:26,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:26,076 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 02:33:26,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:26,127 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 02:33:26,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687999243] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:26,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:26,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-12 02:33:26,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647286842] [2023-11-12 02:33:26,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:26,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:33:26,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-11-12 02:33:26,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states 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 02:33:26,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:26,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-11-12 02:33:26,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:26,477 INFO L124 PetriNetUnfolderBase]: 631/894 cut-off events. [2023-11-12 02:33:26,478 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2023-11-12 02:33:26,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 894 events. 631/894 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2840 event pairs, 241 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 2224. Up to 505 conditions per place. [2023-11-12 02:33:26,485 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 42 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-12 02:33:26,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 247 flow [2023-11-12 02:33:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:33:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:33:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 800 transitions. [2023-11-12 02:33:26,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-11-12 02:33:26,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 800 transitions. [2023-11-12 02:33:26,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 800 transitions. [2023-11-12 02:33:26,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:26,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 800 transitions. [2023-11-12 02:33:26,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 02:33:26,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:26,549 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 02:33:26,549 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 5 states and 800 transitions. [2023-11-12 02:33:26,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 247 flow [2023-11-12 02:33:26,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 235 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-12 02:33:26,552 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 120 flow [2023-11-12 02:33:26,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-12 02:33:26,553 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-11-12 02:33:26,553 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 120 flow [2023-11-12 02:33:26,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states 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 02:33:26,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:26,555 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 02:33:26,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:26,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:33:26,761 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:26,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash 968963985, now seen corresponding path program 1 times [2023-11-12 02:33:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:26,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24787693] [2023-11-12 02:33:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:26,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:33:26,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:26,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24787693] [2023-11-12 02:33:26,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24787693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:26,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044348212] [2023-11-12 02:33:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:26,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:26,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:26,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:26,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:33:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:27,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:27,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:33:27,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:33:27,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044348212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:27,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-12 02:33:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996686797] [2023-11-12 02:33:27,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:27,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:33:27,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:33:27,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:33:27,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-11-12 02:33:27,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 120 flow. Second operand has 9 states, 9 states have (on average 156.22222222222223) internal successors, (1406), 9 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 02:33:27,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:27,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-11-12 02:33:27,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:27,860 INFO L124 PetriNetUnfolderBase]: 1101/1520 cut-off events. [2023-11-12 02:33:27,861 INFO L125 PetriNetUnfolderBase]: For 1278/1278 co-relation queries the response was YES. [2023-11-12 02:33:27,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4222 conditions, 1520 events. 1101/1520 cut-off events. For 1278/1278 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4974 event pairs, 323 based on Foata normal form. 0/1311 useless extension candidates. Maximal degree in co-relation 4198. Up to 662 conditions per place. [2023-11-12 02:33:27,874 INFO L140 encePairwiseOnDemand]: 365/375 looper letters, 56 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2023-11-12 02:33:27,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 376 flow [2023-11-12 02:33:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:33:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:33:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1278 transitions. [2023-11-12 02:33:27,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-11-12 02:33:27,880 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1278 transitions. [2023-11-12 02:33:27,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1278 transitions. [2023-11-12 02:33:27,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:27,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1278 transitions. [2023-11-12 02:33:27,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 02:33:27,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states 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 02:33:27,894 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states 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 02:33:27,895 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 120 flow. Second operand 8 states and 1278 transitions. [2023-11-12 02:33:27,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 376 flow [2023-11-12 02:33:27,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 364 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:33:27,899 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 161 flow [2023-11-12 02:33:27,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=161, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-12 02:33:27,900 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 15 predicate places. [2023-11-12 02:33:27,902 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 161 flow [2023-11-12 02:33:27,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 156.22222222222223) internal successors, (1406), 9 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 02:33:27,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:27,904 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 02:33:27,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:28,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:33:28,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:28,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:28,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1921835571, now seen corresponding path program 1 times [2023-11-12 02:33:28,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:28,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500672783] [2023-11-12 02:33:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:28,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:28,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500672783] [2023-11-12 02:33:28,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500672783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:28,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:28,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:33:28,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608142944] [2023-11-12 02:33:28,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:28,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:28,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:28,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-11-12 02:33:28,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 02:33:28,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:28,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-11-12 02:33:28,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:28,958 INFO L124 PetriNetUnfolderBase]: 1061/1496 cut-off events. [2023-11-12 02:33:28,958 INFO L125 PetriNetUnfolderBase]: For 1349/1349 co-relation queries the response was YES. [2023-11-12 02:33:28,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 1496 events. 1061/1496 cut-off events. For 1349/1349 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4827 event pairs, 203 based on Foata normal form. 0/1400 useless extension candidates. Maximal degree in co-relation 4758. Up to 941 conditions per place. [2023-11-12 02:33:28,974 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 71 selfloop transitions, 9 changer transitions 6/86 dead transitions. [2023-11-12 02:33:28,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 86 transitions, 520 flow [2023-11-12 02:33:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1080 transitions. [2023-11-12 02:33:28,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-12 02:33:28,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1080 transitions. [2023-11-12 02:33:28,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1080 transitions. [2023-11-12 02:33:28,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:28,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1080 transitions. [2023-11-12 02:33:28,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states 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 02:33:28,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 02:33:28,993 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 02:33:28,993 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 161 flow. Second operand 6 states and 1080 transitions. [2023-11-12 02:33:28,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 86 transitions, 520 flow [2023-11-12 02:33:28,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 86 transitions, 512 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:33:29,001 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 223 flow [2023-11-12 02:33:29,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-11-12 02:33:29,005 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-11-12 02:33:29,005 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 223 flow [2023-11-12 02:33:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 02:33:29,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:29,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:29,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:33:29,008 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:29,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash 464186572, now seen corresponding path program 2 times [2023-11-12 02:33:29,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:29,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050178829] [2023-11-12 02:33:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:29,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:29,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050178829] [2023-11-12 02:33:29,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050178829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:29,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285492093] [2023-11-12 02:33:29,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:33:29,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:29,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:29,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:33:29,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:33:29,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:29,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:33:29,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:29,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:33:29,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285492093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:29,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:29,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-12 02:33:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057081581] [2023-11-12 02:33:29,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:29,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:33:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:33:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:33:30,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-11-12 02:33:30,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 223 flow. Second operand has 14 states, 14 states have (on average 154.28571428571428) internal successors, (2160), 14 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states 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 02:33:30,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:30,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-11-12 02:33:30,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:30,786 INFO L124 PetriNetUnfolderBase]: 1369/1962 cut-off events. [2023-11-12 02:33:30,786 INFO L125 PetriNetUnfolderBase]: For 3144/3144 co-relation queries the response was YES. [2023-11-12 02:33:30,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6754 conditions, 1962 events. 1369/1962 cut-off events. For 3144/3144 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6671 event pairs, 730 based on Foata normal form. 28/1958 useless extension candidates. Maximal degree in co-relation 5252. Up to 1495 conditions per place. [2023-11-12 02:33:30,807 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 39 selfloop transitions, 6 changer transitions 51/96 dead transitions. [2023-11-12 02:33:30,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 96 transitions, 644 flow [2023-11-12 02:33:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:33:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:33:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1590 transitions. [2023-11-12 02:33:30,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424 [2023-11-12 02:33:30,817 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1590 transitions. [2023-11-12 02:33:30,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1590 transitions. [2023-11-12 02:33:30,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:30,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1590 transitions. [2023-11-12 02:33:30,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states 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 02:33:30,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states 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 02:33:30,835 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states 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 02:33:30,836 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 223 flow. Second operand 10 states and 1590 transitions. [2023-11-12 02:33:30,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 96 transitions, 644 flow [2023-11-12 02:33:30,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 644 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:33:30,850 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 271 flow [2023-11-12 02:33:30,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=271, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-11-12 02:33:30,851 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2023-11-12 02:33:30,851 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 271 flow [2023-11-12 02:33:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.28571428571428) internal successors, (2160), 14 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states 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 02:33:30,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:30,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:30,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:31,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:31,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:31,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1766217396, now seen corresponding path program 3 times [2023-11-12 02:33:31,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:31,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445643981] [2023-11-12 02:33:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:31,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:33:31,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:31,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445643981] [2023-11-12 02:33:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445643981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957580704] [2023-11-12 02:33:31,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:33:31,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:31,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:31,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:31,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:33:31,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:33:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:31,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:33:31,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:33:31,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:33:31,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957580704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:31,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:31,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-12 02:33:31,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649214375] [2023-11-12 02:33:31,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:31,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:33:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:33:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:33:32,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-11-12 02:33:32,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 271 flow. Second operand has 14 states, 14 states have (on average 154.07142857142858) internal successors, (2157), 14 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states 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 02:33:32,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:32,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-11-12 02:33:32,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:32,690 INFO L124 PetriNetUnfolderBase]: 1282/1805 cut-off events. [2023-11-12 02:33:32,690 INFO L125 PetriNetUnfolderBase]: For 3798/3798 co-relation queries the response was YES. [2023-11-12 02:33:32,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6685 conditions, 1805 events. 1282/1805 cut-off events. For 3798/3798 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6245 event pairs, 494 based on Foata normal form. 86/1853 useless extension candidates. Maximal degree in co-relation 6640. Up to 1183 conditions per place. [2023-11-12 02:33:32,730 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 87 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-11-12 02:33:32,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 795 flow [2023-11-12 02:33:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:33:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:33:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1422 transitions. [2023-11-12 02:33:32,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42133333333333334 [2023-11-12 02:33:32,761 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1422 transitions. [2023-11-12 02:33:32,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1422 transitions. [2023-11-12 02:33:32,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:32,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1422 transitions. [2023-11-12 02:33:32,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 02:33:32,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 02:33:32,790 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 02:33:32,790 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 271 flow. Second operand 9 states and 1422 transitions. [2023-11-12 02:33:32,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 795 flow [2023-11-12 02:33:32,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 745 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-11-12 02:33:32,800 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 275 flow [2023-11-12 02:33:32,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=275, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2023-11-12 02:33:32,801 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2023-11-12 02:33:32,801 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 275 flow [2023-11-12 02:33:32,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.07142857142858) internal successors, (2157), 14 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states 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 02:33:32,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:32,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:32,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:33:33,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:33:33,022 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:33,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash -404441558, now seen corresponding path program 4 times [2023-11-12 02:33:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:33,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932995002] [2023-11-12 02:33:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:33,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:33:33,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:33,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932995002] [2023-11-12 02:33:33,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932995002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:33,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619363865] [2023-11-12 02:33:33,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:33:33,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:33,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:33,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:33:33,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:33:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:33,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:33,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:33:33,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:33:33,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619363865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:33,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:33,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-12 02:33:33,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803658551] [2023-11-12 02:33:33,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:33,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:33:33,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:33,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:33:33,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:33:34,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 375 [2023-11-12 02:33:34,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 275 flow. Second operand has 12 states, 12 states have (on average 151.91666666666666) internal successors, (1823), 12 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states 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 02:33:34,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:34,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 375 [2023-11-12 02:33:34,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:35,015 INFO L124 PetriNetUnfolderBase]: 1625/2262 cut-off events. [2023-11-12 02:33:35,015 INFO L125 PetriNetUnfolderBase]: For 4163/4163 co-relation queries the response was YES. [2023-11-12 02:33:35,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8619 conditions, 2262 events. 1625/2262 cut-off events. For 4163/4163 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7865 event pairs, 169 based on Foata normal form. 38/2224 useless extension candidates. Maximal degree in co-relation 8576. Up to 567 conditions per place. [2023-11-12 02:33:35,039 INFO L140 encePairwiseOnDemand]: 362/375 looper letters, 141 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2023-11-12 02:33:35,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 183 transitions, 1387 flow [2023-11-12 02:33:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:33:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:33:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2797 transitions. [2023-11-12 02:33:35,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143703703703704 [2023-11-12 02:33:35,050 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2797 transitions. [2023-11-12 02:33:35,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2797 transitions. [2023-11-12 02:33:35,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:35,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2797 transitions. [2023-11-12 02:33:35,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.38888888888889) internal successors, (2797), 18 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states 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 02:33:35,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 375.0) internal successors, (7125), 19 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states 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 02:33:35,076 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 375.0) internal successors, (7125), 19 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states 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 02:33:35,076 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 275 flow. Second operand 18 states and 2797 transitions. [2023-11-12 02:33:35,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 183 transitions, 1387 flow [2023-11-12 02:33:35,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 183 transitions, 1343 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-12 02:33:35,087 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 589 flow [2023-11-12 02:33:35,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=589, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-11-12 02:33:35,088 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2023-11-12 02:33:35,088 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 589 flow [2023-11-12 02:33:35,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.91666666666666) internal successors, (1823), 12 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states 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 02:33:35,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:35,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:35,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:35,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:35,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:35,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1581035294, now seen corresponding path program 5 times [2023-11-12 02:33:35,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:35,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666484815] [2023-11-12 02:33:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:35,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:33:35,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666484815] [2023-11-12 02:33:35,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666484815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:35,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721551655] [2023-11-12 02:33:35,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:33:35,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:35,613 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:35,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:33:35,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:33:35,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:35,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:33:35,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:33:35,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:33:35,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721551655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:35,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:35,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-12 02:33:35,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335678152] [2023-11-12 02:33:35,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:33:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:33:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:33:36,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-11-12 02:33:36,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 589 flow. Second operand has 13 states, 13 states have (on average 170.53846153846155) internal successors, (2217), 13 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states 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 02:33:36,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:36,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-11-12 02:33:36,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:37,545 INFO L124 PetriNetUnfolderBase]: 2826/3951 cut-off events. [2023-11-12 02:33:37,545 INFO L125 PetriNetUnfolderBase]: For 10456/10456 co-relation queries the response was YES. [2023-11-12 02:33:37,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15743 conditions, 3951 events. 2826/3951 cut-off events. For 10456/10456 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 15516 event pairs, 641 based on Foata normal form. 190/4065 useless extension candidates. Maximal degree in co-relation 15694. Up to 1719 conditions per place. [2023-11-12 02:33:37,589 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 192 selfloop transitions, 36 changer transitions 16/244 dead transitions. [2023-11-12 02:33:37,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 244 transitions, 2020 flow [2023-11-12 02:33:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:33:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:33:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2503 transitions. [2023-11-12 02:33:37,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767619047619048 [2023-11-12 02:33:37,600 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2503 transitions. [2023-11-12 02:33:37,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2503 transitions. [2023-11-12 02:33:37,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:37,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2503 transitions. [2023-11-12 02:33:37,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 178.78571428571428) internal successors, (2503), 14 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states 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 02:33:37,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states 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 02:33:37,624 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states 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 02:33:37,625 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 589 flow. Second operand 14 states and 2503 transitions. [2023-11-12 02:33:37,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 244 transitions, 2020 flow [2023-11-12 02:33:37,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 244 transitions, 1895 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-11-12 02:33:37,688 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 904 flow [2023-11-12 02:33:37,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=904, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2023-11-12 02:33:37,690 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2023-11-12 02:33:37,690 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 904 flow [2023-11-12 02:33:37,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.53846153846155) internal successors, (2217), 13 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states 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 02:33:37,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:37,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:37,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:33:37,898 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:37,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash 705070058, now seen corresponding path program 6 times [2023-11-12 02:33:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:37,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610630276] [2023-11-12 02:33:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:33:38,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610630276] [2023-11-12 02:33:38,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610630276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320022998] [2023-11-12 02:33:38,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:33:38,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:38,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:38,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:33:38,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:33:38,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:38,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:33:38,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:33:38,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:33:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320022998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:38,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:38,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 02:33:38,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171381788] [2023-11-12 02:33:38,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:38,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:33:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:33:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:33:38,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-11-12 02:33:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 904 flow. Second operand has 11 states, 11 states have (on average 171.0) internal successors, (1881), 11 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states 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 02:33:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-11-12 02:33:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:40,330 INFO L124 PetriNetUnfolderBase]: 3302/4619 cut-off events. [2023-11-12 02:33:40,330 INFO L125 PetriNetUnfolderBase]: For 24641/24641 co-relation queries the response was YES. [2023-11-12 02:33:40,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23814 conditions, 4619 events. 3302/4619 cut-off events. For 24641/24641 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 18364 event pairs, 339 based on Foata normal form. 38/4657 useless extension candidates. Maximal degree in co-relation 23759. Up to 1541 conditions per place. [2023-11-12 02:33:40,394 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 175 selfloop transitions, 51 changer transitions 15/241 dead transitions. [2023-11-12 02:33:40,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 241 transitions, 2220 flow [2023-11-12 02:33:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:33:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:33:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2325 transitions. [2023-11-12 02:33:40,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2023-11-12 02:33:40,403 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2325 transitions. [2023-11-12 02:33:40,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2325 transitions. [2023-11-12 02:33:40,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:40,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2325 transitions. [2023-11-12 02:33:40,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 178.84615384615384) internal successors, (2325), 13 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states 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 02:33:40,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 02:33:40,422 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 02:33:40,422 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 904 flow. Second operand 13 states and 2325 transitions. [2023-11-12 02:33:40,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 241 transitions, 2220 flow [2023-11-12 02:33:40,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 241 transitions, 2206 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-12 02:33:40,524 INFO L231 Difference]: Finished difference. Result has 113 places, 111 transitions, 1200 flow [2023-11-12 02:33:40,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1200, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2023-11-12 02:33:40,525 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 80 predicate places. [2023-11-12 02:33:40,525 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 1200 flow [2023-11-12 02:33:40,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0) internal successors, (1881), 11 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states 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 02:33:40,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:40,526 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:40,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:40,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:33:40,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:40,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash 449194697, now seen corresponding path program 7 times [2023-11-12 02:33:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:40,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386693217] [2023-11-12 02:33:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:33:40,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:40,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386693217] [2023-11-12 02:33:40,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386693217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:40,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475532172] [2023-11-12 02:33:40,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:33:40,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:40,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:40,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:41,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:33:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:41,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:33:41,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:33:41,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:33:41,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475532172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:41,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:41,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-12 02:33:41,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417701944] [2023-11-12 02:33:41,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:41,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:33:41,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:41,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:33:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:33:42,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-11-12 02:33:42,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 1200 flow. Second operand has 19 states, 19 states have (on average 153.78947368421052) internal successors, (2922), 19 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states 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 02:33:42,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:42,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-11-12 02:33:42,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:43,900 INFO L124 PetriNetUnfolderBase]: 4693/6659 cut-off events. [2023-11-12 02:33:43,900 INFO L125 PetriNetUnfolderBase]: For 46736/46736 co-relation queries the response was YES. [2023-11-12 02:33:43,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36459 conditions, 6659 events. 4693/6659 cut-off events. For 46736/46736 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 29080 event pairs, 1877 based on Foata normal form. 142/6801 useless extension candidates. Maximal degree in co-relation 33911. Up to 4616 conditions per place. [2023-11-12 02:33:43,991 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 105 selfloop transitions, 8 changer transitions 132/245 dead transitions. [2023-11-12 02:33:43,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 245 transitions, 2953 flow [2023-11-12 02:33:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:33:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:33:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2062 transitions. [2023-11-12 02:33:44,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422974358974359 [2023-11-12 02:33:44,008 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2062 transitions. [2023-11-12 02:33:44,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2062 transitions. [2023-11-12 02:33:44,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:44,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2062 transitions. [2023-11-12 02:33:44,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 158.6153846153846) internal successors, (2062), 13 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states 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 02:33:44,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 02:33:44,027 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 02:33:44,027 INFO L175 Difference]: Start difference. First operand has 113 places, 111 transitions, 1200 flow. Second operand 13 states and 2062 transitions. [2023-11-12 02:33:44,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 245 transitions, 2953 flow [2023-11-12 02:33:44,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 245 transitions, 2887 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-12 02:33:44,349 INFO L231 Difference]: Finished difference. Result has 128 places, 113 transitions, 1236 flow [2023-11-12 02:33:44,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1236, PETRI_PLACES=128, PETRI_TRANSITIONS=113} [2023-11-12 02:33:44,352 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 95 predicate places. [2023-11-12 02:33:44,352 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 113 transitions, 1236 flow [2023-11-12 02:33:44,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 153.78947368421052) internal successors, (2922), 19 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states 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 02:33:44,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:44,354 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:44,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:44,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:33:44,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:44,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash 797358705, now seen corresponding path program 8 times [2023-11-12 02:33:44,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:44,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748545400] [2023-11-12 02:33:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:44,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:33:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748545400] [2023-11-12 02:33:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748545400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243259932] [2023-11-12 02:33:44,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:33:44,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:44,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:44,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:44,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:33:45,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:33:45,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:45,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:33:45,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:33:45,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:33:45,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243259932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:45,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:45,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-12 02:33:45,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389945536] [2023-11-12 02:33:45,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:45,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:33:45,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:45,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:33:45,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:33:46,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2023-11-12 02:33:46,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 113 transitions, 1236 flow. Second operand has 19 states, 19 states have (on average 153.6315789473684) internal successors, (2919), 19 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states 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 02:33:46,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:46,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2023-11-12 02:33:46,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:47,621 INFO L124 PetriNetUnfolderBase]: 3865/5398 cut-off events. [2023-11-12 02:33:47,621 INFO L125 PetriNetUnfolderBase]: For 42736/42736 co-relation queries the response was YES. [2023-11-12 02:33:47,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30400 conditions, 5398 events. 3865/5398 cut-off events. For 42736/42736 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22494 event pairs, 1060 based on Foata normal form. 214/5612 useless extension candidates. Maximal degree in co-relation 30320. Up to 3057 conditions per place. [2023-11-12 02:33:47,703 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 255 selfloop transitions, 18 changer transitions 0/273 dead transitions. [2023-11-12 02:33:47,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 273 transitions, 3702 flow [2023-11-12 02:33:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:33:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:33:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1892 transitions. [2023-11-12 02:33:47,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42044444444444445 [2023-11-12 02:33:47,710 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1892 transitions. [2023-11-12 02:33:47,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1892 transitions. [2023-11-12 02:33:47,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:47,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1892 transitions. [2023-11-12 02:33:47,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.66666666666666) internal successors, (1892), 12 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states 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 02:33:47,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states 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 02:33:47,725 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states 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 02:33:47,726 INFO L175 Difference]: Start difference. First operand has 128 places, 113 transitions, 1236 flow. Second operand 12 states and 1892 transitions. [2023-11-12 02:33:47,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 273 transitions, 3702 flow [2023-11-12 02:33:47,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 273 transitions, 3556 flow, removed 67 selfloop flow, removed 9 redundant places. [2023-11-12 02:33:47,904 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 1236 flow [2023-11-12 02:33:47,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1236, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2023-11-12 02:33:47,906 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 90 predicate places. [2023-11-12 02:33:47,906 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 1236 flow [2023-11-12 02:33:47,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 153.6315789473684) internal successors, (2919), 19 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states 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 02:33:47,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:47,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:47,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:48,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:33:48,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:33:48,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash -567224173, now seen corresponding path program 9 times [2023-11-12 02:33:48,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:48,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522216255] [2023-11-12 02:33:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:48,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:33:48,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:48,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522216255] [2023-11-12 02:33:48,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522216255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322755818] [2023-11-12 02:33:48,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:33:48,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:48,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:48,386 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:48,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:33:48,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:33:48,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:48,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:33:48,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:33:48,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:33:49,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322755818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:49,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:33:49,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-12 02:33:49,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147336001] [2023-11-12 02:33:49,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:49,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:33:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:33:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:33:49,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 375 [2023-11-12 02:33:49,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 1236 flow. Second operand has 19 states, 19 states have (on average 154.57894736842104) internal successors, (2937), 19 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states 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 02:33:49,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:49,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 375 [2023-11-12 02:33:49,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:51,109 INFO L124 PetriNetUnfolderBase]: 4369/6078 cut-off events. [2023-11-12 02:33:51,110 INFO L125 PetriNetUnfolderBase]: For 42658/42658 co-relation queries the response was YES. [2023-11-12 02:33:51,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34770 conditions, 6078 events. 4369/6078 cut-off events. For 42658/42658 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 24515 event pairs, 643 based on Foata normal form. 44/6122 useless extension candidates. Maximal degree in co-relation 34696. Up to 2354 conditions per place. [2023-11-12 02:33:51,173 INFO L140 encePairwiseOnDemand]: 365/375 looper letters, 139 selfloop transitions, 47 changer transitions 0/186 dead transitions. [2023-11-12 02:33:51,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 186 transitions, 2193 flow [2023-11-12 02:33:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:33:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:33:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2067 transitions. [2023-11-12 02:33:51,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424 [2023-11-12 02:33:51,180 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2067 transitions. [2023-11-12 02:33:51,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2067 transitions. [2023-11-12 02:33:51,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:51,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2067 transitions. [2023-11-12 02:33:51,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 159.0) internal successors, (2067), 13 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states 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 02:33:51,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 02:33:51,197 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 02:33:51,197 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 1236 flow. Second operand 13 states and 2067 transitions. [2023-11-12 02:33:51,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 186 transitions, 2193 flow [2023-11-12 02:33:51,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 2109 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-11-12 02:33:51,459 INFO L231 Difference]: Finished difference. Result has 128 places, 123 transitions, 1438 flow [2023-11-12 02:33:51,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1438, PETRI_PLACES=128, PETRI_TRANSITIONS=123} [2023-11-12 02:33:51,460 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 95 predicate places. [2023-11-12 02:33:51,460 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 123 transitions, 1438 flow [2023-11-12 02:33:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 154.57894736842104) internal successors, (2937), 19 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states 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 02:33:51,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:51,462 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:51,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:51,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:33:51,669 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 1 more)] === [2023-11-12 02:33:51,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash 120194041, now seen corresponding path program 10 times [2023-11-12 02:33:51,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:51,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229698239] [2023-11-12 02:33:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:51,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:33:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:52,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229698239] [2023-11-12 02:33:52,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229698239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:33:52,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861255047] [2023-11-12 02:33:52,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:33:52,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:52,057 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:52,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03e5fa48-3c20-48a5-90a2-b3fac7059d43/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:33:52,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:33:52,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:33:52,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:33:52,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:33:52,803 INFO L327 TraceCheckSpWp]: Computing backward predicates...