./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya --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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:40:08,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:40:08,712 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:40:08,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:40:08,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:40:08,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:40:08,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:40:08,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:40:08,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:40:08,745 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:40:08,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:40:08,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:40:08,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:40:08,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:40:08,747 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:40:08,748 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:40:08,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:40:08,749 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:40:08,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:40:08,750 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:40:08,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:40:08,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:40:08,752 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:40:08,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:40:08,753 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:40:08,753 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:40:08,753 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:40:08,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:40:08,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:40:08,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:40:08,755 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:40:08,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:40:08,756 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:40:08,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:40:08,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:40:08,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:40:08,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:40:08,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:40:08,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:40:08,758 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:40:08,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:40:08,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:40:08,758 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_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2023-11-29 05:40:08,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:40:09,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:40:09,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:40:09,020 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:40:09,021 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:40:09,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2023-11-29 05:40:11,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:40:11,849 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:40:11,849 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2023-11-29 05:40:11,858 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/data/ac4b54a2a/94c6bd3d0a1646c9a5356b472c0b0912/FLAG82acd35af [2023-11-29 05:40:11,873 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/data/ac4b54a2a/94c6bd3d0a1646c9a5356b472c0b0912 [2023-11-29 05:40:11,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:40:11,879 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:40:11,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:40:11,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:40:11,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:40:11,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:40:11" (1/1) ... [2023-11-29 05:40:11,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1260d214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:11, skipping insertion in model container [2023-11-29 05:40:11,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:40:11" (1/1) ... [2023-11-29 05:40:11,914 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:40:12,097 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_a0cb92ae-c34a-49a3-aa61-de02828e8181/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2023-11-29 05:40:12,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:40:12,118 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:40:12,143 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_a0cb92ae-c34a-49a3-aa61-de02828e8181/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2904,2917] [2023-11-29 05:40:12,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:40:12,156 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:40:12,156 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:40:12,164 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:40:12,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12 WrapperNode [2023-11-29 05:40:12,165 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:40:12,166 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:40:12,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:40:12,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:40:12,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,184 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,215 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 290 [2023-11-29 05:40:12,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:40:12,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:40:12,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:40:12,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:40:12,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,234 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,249 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 11, 2, 2, 2]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 2, 1, 1, 1]. [2023-11-29 05:40:12,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,262 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,277 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:40:12,278 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:40:12,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:40:12,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:40:12,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (1/1) ... [2023-11-29 05:40:12,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:40:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:12,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:40:12,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:40:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:40:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:40:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:40:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:40:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:40:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:40:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:40:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:40:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:40:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:40:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:40:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:40:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:40:12,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:40:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:40:12,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:40:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:40:12,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:40:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:40:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:40:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:40:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:40:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:40:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:40:12,354 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:40:12,475 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:40:12,477 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:40:12,910 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:40:13,266 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:40:13,266 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-29 05:40:13,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:40:13 BoogieIcfgContainer [2023-11-29 05:40:13,267 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:40:13,269 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:40:13,270 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:40:13,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:40:13,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:40:11" (1/3) ... [2023-11-29 05:40:13,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75de36b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:40:13, skipping insertion in model container [2023-11-29 05:40:13,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:40:12" (2/3) ... [2023-11-29 05:40:13,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75de36b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:40:13, skipping insertion in model container [2023-11-29 05:40:13,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:40:13" (3/3) ... [2023-11-29 05:40:13,275 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-11-29 05:40:13,284 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:40:13,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:40:13,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:40:13,295 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:40:13,357 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:40:13,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 52 transitions, 125 flow [2023-11-29 05:40:13,438 INFO L124 PetriNetUnfolderBase]: 11/49 cut-off events. [2023-11-29 05:40:13,438 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:40:13,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 11/49 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-29 05:40:13,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 52 transitions, 125 flow [2023-11-29 05:40:13,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 48 transitions, 114 flow [2023-11-29 05:40:13,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:40:13,462 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;@627036f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:40:13,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 05:40:13,478 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:40:13,478 INFO L124 PetriNetUnfolderBase]: 11/47 cut-off events. [2023-11-29 05:40:13,478 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:40:13,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:13,479 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] [2023-11-29 05:40:13,479 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)] === [2023-11-29 05:40:13,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash -918928211, now seen corresponding path program 1 times [2023-11-29 05:40:13,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:13,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795319242] [2023-11-29 05:40:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:13,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:13,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795319242] [2023-11-29 05:40:13,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795319242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:40:13,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:40:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:40:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837592700] [2023-11-29 05:40:13,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:40:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:40:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:40:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:40:13,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-29 05:40:13,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:13,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:13,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-29 05:40:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:14,603 INFO L124 PetriNetUnfolderBase]: 4141/5904 cut-off events. [2023-11-29 05:40:14,604 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-11-29 05:40:14,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11854 conditions, 5904 events. 4141/5904 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 29957 event pairs, 1127 based on Foata normal form. 623/5272 useless extension candidates. Maximal degree in co-relation 10472. Up to 3653 conditions per place. [2023-11-29 05:40:14,643 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 67 selfloop transitions, 4 changer transitions 1/76 dead transitions. [2023-11-29 05:40:14,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 329 flow [2023-11-29 05:40:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:40:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:40:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2023-11-29 05:40:14,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2023-11-29 05:40:14,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2023-11-29 05:40:14,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2023-11-29 05:40:14,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:14,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2023-11-29 05:40:14,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:14,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:14,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:14,665 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 114 flow. Second operand 3 states and 100 transitions. [2023-11-29 05:40:14,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 329 flow [2023-11-29 05:40:14,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 307 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:40:14,676 INFO L231 Difference]: Finished difference. Result has 44 places, 48 transitions, 122 flow [2023-11-29 05:40:14,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=48} [2023-11-29 05:40:14,681 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-29 05:40:14,681 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 48 transitions, 122 flow [2023-11-29 05:40:14,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:14,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:14,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:14,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:40:14,683 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)] === [2023-11-29 05:40:14,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash 180274219, now seen corresponding path program 1 times [2023-11-29 05:40:14,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:14,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648527638] [2023-11-29 05:40:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:40:14,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:14,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648527638] [2023-11-29 05:40:14,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648527638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:40:14,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:40:14,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:40:14,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603343040] [2023-11-29 05:40:14,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:40:14,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:40:14,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:40:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:40:14,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-29 05:40:14,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 48 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:14,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:14,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-29 05:40:14,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:15,466 INFO L124 PetriNetUnfolderBase]: 4142/5899 cut-off events. [2023-11-29 05:40:15,467 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2023-11-29 05:40:15,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12546 conditions, 5899 events. 4142/5899 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30100 event pairs, 2865 based on Foata normal form. 0/4631 useless extension candidates. Maximal degree in co-relation 4131. Up to 5652 conditions per place. [2023-11-29 05:40:15,506 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 43 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2023-11-29 05:40:15,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 222 flow [2023-11-29 05:40:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:40:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:40:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2023-11-29 05:40:15,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35096153846153844 [2023-11-29 05:40:15,509 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2023-11-29 05:40:15,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2023-11-29 05:40:15,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:15,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2023-11-29 05:40:15,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:15,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:15,511 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:15,511 INFO L175 Difference]: Start difference. First operand has 44 places, 48 transitions, 122 flow. Second operand 4 states and 73 transitions. [2023-11-29 05:40:15,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 222 flow [2023-11-29 05:40:15,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:40:15,515 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 132 flow [2023-11-29 05:40:15,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-11-29 05:40:15,516 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-11-29 05:40:15,516 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 132 flow [2023-11-29 05:40:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:15,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:15,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:40:15,517 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)] === [2023-11-29 05:40:15,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1175735483, now seen corresponding path program 1 times [2023-11-29 05:40:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:15,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582435419] [2023-11-29 05:40:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582435419] [2023-11-29 05:40:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582435419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995818207] [2023-11-29 05:40:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:15,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:15,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:15,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:40:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:15,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:40:15,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:15,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-11-29 05:40:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:15,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:40:15,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995818207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:40:15,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:40:15,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2023-11-29 05:40:15,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251888538] [2023-11-29 05:40:15,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:40:15,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:40:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:15,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:40:15,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:40:15,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2023-11-29 05:40:15,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:15,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:15,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2023-11-29 05:40:15,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:17,172 INFO L124 PetriNetUnfolderBase]: 8253/11673 cut-off events. [2023-11-29 05:40:17,172 INFO L125 PetriNetUnfolderBase]: For 750/750 co-relation queries the response was YES. [2023-11-29 05:40:17,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24277 conditions, 11673 events. 8253/11673 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 64597 event pairs, 4657 based on Foata normal form. 0/9329 useless extension candidates. Maximal degree in co-relation 24263. Up to 6390 conditions per place. [2023-11-29 05:40:17,274 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 123 selfloop transitions, 7 changer transitions 0/133 dead transitions. [2023-11-29 05:40:17,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 133 transitions, 598 flow [2023-11-29 05:40:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:40:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:40:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2023-11-29 05:40:17,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2023-11-29 05:40:17,277 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 157 transitions. [2023-11-29 05:40:17,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 157 transitions. [2023-11-29 05:40:17,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:17,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 157 transitions. [2023-11-29 05:40:17,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:17,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:17,281 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:17,282 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 132 flow. Second operand 6 states and 157 transitions. [2023-11-29 05:40:17,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 133 transitions, 598 flow [2023-11-29 05:40:17,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 133 transitions, 590 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 05:40:17,287 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 178 flow [2023-11-29 05:40:17,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2023-11-29 05:40:17,288 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2023-11-29 05:40:17,288 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 178 flow [2023-11-29 05:40:17,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:17,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:17,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:17,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:40:17,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:17,492 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)] === [2023-11-29 05:40:17,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:17,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1502741770, now seen corresponding path program 1 times [2023-11-29 05:40:17,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419637730] [2023-11-29 05:40:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:17,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:40:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419637730] [2023-11-29 05:40:17,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419637730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865034966] [2023-11-29 05:40:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:17,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:17,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:17,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:40:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:17,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:40:17,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:40:17,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:40:17,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865034966] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:17,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:40:17,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-29 05:40:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642704072] [2023-11-29 05:40:17,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:40:17,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:40:17,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:17,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:40:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:40:17,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-29 05:40:17,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:17,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:17,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-29 05:40:17,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:19,115 INFO L124 PetriNetUnfolderBase]: 8242/11892 cut-off events. [2023-11-29 05:40:19,115 INFO L125 PetriNetUnfolderBase]: For 1937/1937 co-relation queries the response was YES. [2023-11-29 05:40:19,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27617 conditions, 11892 events. 8242/11892 cut-off events. For 1937/1937 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 69339 event pairs, 2750 based on Foata normal form. 388/10322 useless extension candidates. Maximal degree in co-relation 27595. Up to 6098 conditions per place. [2023-11-29 05:40:19,171 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 68 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-11-29 05:40:19,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 394 flow [2023-11-29 05:40:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:40:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:40:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2023-11-29 05:40:19,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-29 05:40:19,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2023-11-29 05:40:19,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2023-11-29 05:40:19,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:19,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2023-11-29 05:40:19,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:19,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:19,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:19,176 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 178 flow. Second operand 5 states and 100 transitions. [2023-11-29 05:40:19,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 394 flow [2023-11-29 05:40:19,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 390 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 05:40:19,206 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 215 flow [2023-11-29 05:40:19,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-11-29 05:40:19,207 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2023-11-29 05:40:19,207 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 215 flow [2023-11-29 05:40:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:19,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:19,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:19,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:40:19,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:19,408 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)] === [2023-11-29 05:40:19,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1059553159, now seen corresponding path program 1 times [2023-11-29 05:40:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:19,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029648440] [2023-11-29 05:40:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:19,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:19,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:19,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029648440] [2023-11-29 05:40:19,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029648440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:19,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784018466] [2023-11-29 05:40:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:19,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:19,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:19,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:19,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:40:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:19,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:40:19,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:19,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 05:40:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:19,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:19,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-11-29 05:40:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:19,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784018466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:19,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:19,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:40:19,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840528417] [2023-11-29 05:40:19,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:19,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:40:19,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:40:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:40:19,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2023-11-29 05:40:19,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 215 flow. Second operand has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:19,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:19,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2023-11-29 05:40:19,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:21,426 INFO L124 PetriNetUnfolderBase]: 13406/18928 cut-off events. [2023-11-29 05:40:21,426 INFO L125 PetriNetUnfolderBase]: For 12244/12244 co-relation queries the response was YES. [2023-11-29 05:40:21,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48109 conditions, 18928 events. 13406/18928 cut-off events. For 12244/12244 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 110611 event pairs, 7280 based on Foata normal form. 0/15844 useless extension candidates. Maximal degree in co-relation 48083. Up to 7110 conditions per place. [2023-11-29 05:40:21,544 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 124 selfloop transitions, 15 changer transitions 0/142 dead transitions. [2023-11-29 05:40:21,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 142 transitions, 729 flow [2023-11-29 05:40:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:40:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:40:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2023-11-29 05:40:21,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2023-11-29 05:40:21,547 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 165 transitions. [2023-11-29 05:40:21,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 165 transitions. [2023-11-29 05:40:21,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:21,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 165 transitions. [2023-11-29 05:40:21,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:21,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:21,550 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:21,550 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 215 flow. Second operand 7 states and 165 transitions. [2023-11-29 05:40:21,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 142 transitions, 729 flow [2023-11-29 05:40:21,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 142 transitions, 718 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:40:21,642 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 314 flow [2023-11-29 05:40:21,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-11-29 05:40:21,643 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2023-11-29 05:40:21,643 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 314 flow [2023-11-29 05:40:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:21,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:21,644 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, 1, 1, 1] [2023-11-29 05:40:21,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:40:21,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:21,848 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)] === [2023-11-29 05:40:21,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash -749270169, now seen corresponding path program 2 times [2023-11-29 05:40:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:21,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978054590] [2023-11-29 05:40:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:40:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978054590] [2023-11-29 05:40:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978054590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620040877] [2023-11-29 05:40:21,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:40:21,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:21,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:21,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:40:22,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:40:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:22,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:40:22,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:40:22,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:40:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620040877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:22,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:22,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-29 05:40:22,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003298725] [2023-11-29 05:40:22,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:40:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:40:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:40:22,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-29 05:40:22,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:22,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:22,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-29 05:40:22,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:23,941 INFO L124 PetriNetUnfolderBase]: 13293/19050 cut-off events. [2023-11-29 05:40:23,941 INFO L125 PetriNetUnfolderBase]: For 29798/30441 co-relation queries the response was YES. [2023-11-29 05:40:23,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51634 conditions, 19050 events. 13293/19050 cut-off events. For 29798/30441 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 114755 event pairs, 4081 based on Foata normal form. 643/16738 useless extension candidates. Maximal degree in co-relation 51604. Up to 10840 conditions per place. [2023-11-29 05:40:24,040 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 85 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2023-11-29 05:40:24,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 677 flow [2023-11-29 05:40:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:40:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:40:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2023-11-29 05:40:24,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2023-11-29 05:40:24,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 92 transitions. [2023-11-29 05:40:24,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 92 transitions. [2023-11-29 05:40:24,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:24,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 92 transitions. [2023-11-29 05:40:24,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:24,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:24,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:24,044 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 314 flow. Second operand 4 states and 92 transitions. [2023-11-29 05:40:24,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 677 flow [2023-11-29 05:40:24,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 644 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-29 05:40:24,069 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 318 flow [2023-11-29 05:40:24,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2023-11-29 05:40:24,071 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-11-29 05:40:24,071 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 318 flow [2023-11-29 05:40:24,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:24,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:24,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:24,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:40:24,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:40:24,276 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)] === [2023-11-29 05:40:24,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -920894698, now seen corresponding path program 1 times [2023-11-29 05:40:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:24,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294880011] [2023-11-29 05:40:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:24,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:40:24,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:24,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294880011] [2023-11-29 05:40:24,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294880011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:40:24,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:40:24,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:40:24,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148710364] [2023-11-29 05:40:24,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:40:24,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:40:24,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:24,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:40:24,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:40:24,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2023-11-29 05:40:24,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:24,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:24,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2023-11-29 05:40:24,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:26,114 INFO L124 PetriNetUnfolderBase]: 13763/19251 cut-off events. [2023-11-29 05:40:26,114 INFO L125 PetriNetUnfolderBase]: For 30686/31309 co-relation queries the response was YES. [2023-11-29 05:40:26,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56104 conditions, 19251 events. 13763/19251 cut-off events. For 30686/31309 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 107809 event pairs, 9223 based on Foata normal form. 623/17592 useless extension candidates. Maximal degree in co-relation 56073. Up to 14233 conditions per place. [2023-11-29 05:40:26,192 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 122 selfloop transitions, 8 changer transitions 0/135 dead transitions. [2023-11-29 05:40:26,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 853 flow [2023-11-29 05:40:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:40:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:40:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2023-11-29 05:40:26,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2023-11-29 05:40:26,193 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2023-11-29 05:40:26,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2023-11-29 05:40:26,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:26,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2023-11-29 05:40:26,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:26,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:26,195 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:26,195 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 318 flow. Second operand 6 states and 148 transitions. [2023-11-29 05:40:26,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 853 flow [2023-11-29 05:40:26,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 135 transitions, 844 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:40:26,226 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 369 flow [2023-11-29 05:40:26,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-11-29 05:40:26,227 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 28 predicate places. [2023-11-29 05:40:26,227 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 369 flow [2023-11-29 05:40:26,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:26,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:26,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:26,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:40:26,227 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)] === [2023-11-29 05:40:26,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -44190016, now seen corresponding path program 1 times [2023-11-29 05:40:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589812326] [2023-11-29 05:40:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:40:26,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:26,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589812326] [2023-11-29 05:40:26,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589812326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:26,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684608375] [2023-11-29 05:40:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:26,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:26,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:26,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:40:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:26,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:40:26,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:26,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 05:40:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:40:26,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:26,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-11-29 05:40:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:40:26,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684608375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:26,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:26,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:40:26,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903883893] [2023-11-29 05:40:26,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:26,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:40:26,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:26,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:40:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:40:26,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 52 [2023-11-29 05:40:26,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 369 flow. Second operand has 15 states, 15 states have (on average 9.066666666666666) internal successors, (136), 15 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:26,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:26,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 52 [2023-11-29 05:40:26,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:28,584 INFO L124 PetriNetUnfolderBase]: 12679/17752 cut-off events. [2023-11-29 05:40:28,584 INFO L125 PetriNetUnfolderBase]: For 30820/31391 co-relation queries the response was YES. [2023-11-29 05:40:28,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54774 conditions, 17752 events. 12679/17752 cut-off events. For 30820/31391 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 98615 event pairs, 7421 based on Foata normal form. 571/16311 useless extension candidates. Maximal degree in co-relation 54739. Up to 8023 conditions per place. [2023-11-29 05:40:28,689 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 128 selfloop transitions, 15 changer transitions 0/148 dead transitions. [2023-11-29 05:40:28,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 148 transitions, 1017 flow [2023-11-29 05:40:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:40:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:40:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2023-11-29 05:40:28,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 05:40:28,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 156 transitions. [2023-11-29 05:40:28,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 156 transitions. [2023-11-29 05:40:28,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:28,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 156 transitions. [2023-11-29 05:40:28,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:28,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:28,693 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:28,693 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 369 flow. Second operand 7 states and 156 transitions. [2023-11-29 05:40:28,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 148 transitions, 1017 flow [2023-11-29 05:40:28,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 148 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:40:28,791 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 456 flow [2023-11-29 05:40:28,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2023-11-29 05:40:28,792 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 35 predicate places. [2023-11-29 05:40:28,792 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 456 flow [2023-11-29 05:40:28,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.066666666666666) internal successors, (136), 15 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:28,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:28,793 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:28,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:40:28,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:28,994 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)] === [2023-11-29 05:40:28,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash 658224414, now seen corresponding path program 1 times [2023-11-29 05:40:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:28,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495741544] [2023-11-29 05:40:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:30,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495741544] [2023-11-29 05:40:30,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495741544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924972268] [2023-11-29 05:40:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:30,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:30,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:30,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:40:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:30,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:40:30,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:30,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 05:40:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:40:30,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:30,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:40:30,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-29 05:40:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:40:31,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924972268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:31,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:31,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 38 [2023-11-29 05:40:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975506520] [2023-11-29 05:40:31,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 05:40:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 05:40:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:40:31,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-29 05:40:31,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 456 flow. Second operand has 39 states, 39 states have (on average 7.3076923076923075) internal successors, (285), 39 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:31,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:31,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-29 05:40:31,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:43,858 INFO L124 PetriNetUnfolderBase]: 67009/92220 cut-off events. [2023-11-29 05:40:43,858 INFO L125 PetriNetUnfolderBase]: For 137181/137181 co-relation queries the response was YES. [2023-11-29 05:40:44,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291318 conditions, 92220 events. 67009/92220 cut-off events. For 137181/137181 co-relation queries the response was YES. Maximal size of possible extension queue 2517. Compared 599727 event pairs, 23576 based on Foata normal form. 0/80614 useless extension candidates. Maximal degree in co-relation 224301. Up to 19881 conditions per place. [2023-11-29 05:40:44,439 INFO L140 encePairwiseOnDemand]: 32/52 looper letters, 969 selfloop transitions, 129 changer transitions 0/1100 dead transitions. [2023-11-29 05:40:44,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 1100 transitions, 6780 flow [2023-11-29 05:40:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 05:40:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 05:40:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1222 transitions. [2023-11-29 05:40:44,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-11-29 05:40:44,448 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 1222 transitions. [2023-11-29 05:40:44,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 1222 transitions. [2023-11-29 05:40:44,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:44,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 1222 transitions. [2023-11-29 05:40:44,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 23.96078431372549) internal successors, (1222), 51 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:44,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 52.0) internal successors, (2704), 52 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:44,463 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 52.0) internal successors, (2704), 52 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:44,464 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 456 flow. Second operand 51 states and 1222 transitions. [2023-11-29 05:40:44,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 1100 transitions, 6780 flow [2023-11-29 05:40:46,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 1100 transitions, 6460 flow, removed 152 selfloop flow, removed 3 redundant places. [2023-11-29 05:40:46,854 INFO L231 Difference]: Finished difference. Result has 173 places, 202 transitions, 1858 flow [2023-11-29 05:40:46,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1858, PETRI_PLACES=173, PETRI_TRANSITIONS=202} [2023-11-29 05:40:46,854 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 126 predicate places. [2023-11-29 05:40:46,855 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 202 transitions, 1858 flow [2023-11-29 05:40:46,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 7.3076923076923075) internal successors, (285), 39 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:46,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:46,855 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:46,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:40:47,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:40:47,056 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)] === [2023-11-29 05:40:47,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:47,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2096065770, now seen corresponding path program 2 times [2023-11-29 05:40:47,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:47,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341925566] [2023-11-29 05:40:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:47,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:47,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341925566] [2023-11-29 05:40:47,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341925566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392098827] [2023-11-29 05:40:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:40:47,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:47,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:47,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:47,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:40:47,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:40:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:47,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:40:47,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:48,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 05:40:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:40:48,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:48,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:40:48,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-29 05:40:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:40:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392098827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:48,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 38 [2023-11-29 05:40:48,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122554803] [2023-11-29 05:40:48,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:48,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 05:40:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 05:40:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:40:48,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-29 05:40:48,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 202 transitions, 1858 flow. Second operand has 38 states, 38 states have (on average 7.157894736842105) internal successors, (272), 38 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:48,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:48,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-29 05:40:48,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:22,307 INFO L124 PetriNetUnfolderBase]: 137946/192325 cut-off events. [2023-11-29 05:41:22,307 INFO L125 PetriNetUnfolderBase]: For 1948012/1948012 co-relation queries the response was YES. [2023-11-29 05:41:23,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988814 conditions, 192325 events. 137946/192325 cut-off events. For 1948012/1948012 co-relation queries the response was YES. Maximal size of possible extension queue 4428. Compared 1369945 event pairs, 12800 based on Foata normal form. 304/167481 useless extension candidates. Maximal degree in co-relation 868369. Up to 32003 conditions per place. [2023-11-29 05:41:24,597 INFO L140 encePairwiseOnDemand]: 29/52 looper letters, 1592 selfloop transitions, 510 changer transitions 132/2236 dead transitions. [2023-11-29 05:41:24,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 2236 transitions, 26612 flow [2023-11-29 05:41:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 05:41:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-11-29 05:41:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 1376 transitions. [2023-11-29 05:41:24,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3624868282402529 [2023-11-29 05:41:24,605 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 1376 transitions. [2023-11-29 05:41:24,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 1376 transitions. [2023-11-29 05:41:24,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:24,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 1376 transitions. [2023-11-29 05:41:24,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 18.84931506849315) internal successors, (1376), 73 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:24,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 52.0) internal successors, (3848), 74 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:24,618 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 52.0) internal successors, (3848), 74 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:24,618 INFO L175 Difference]: Start difference. First operand has 173 places, 202 transitions, 1858 flow. Second operand 73 states and 1376 transitions. [2023-11-29 05:41:24,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 2236 transitions, 26612 flow [2023-11-29 05:41:45,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 2236 transitions, 25638 flow, removed 486 selfloop flow, removed 1 redundant places. [2023-11-29 05:41:45,384 INFO L231 Difference]: Finished difference. Result has 308 places, 698 transitions, 9445 flow [2023-11-29 05:41:45,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=9445, PETRI_PLACES=308, PETRI_TRANSITIONS=698} [2023-11-29 05:41:45,385 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 261 predicate places. [2023-11-29 05:41:45,385 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 698 transitions, 9445 flow [2023-11-29 05:41:45,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.157894736842105) internal successors, (272), 38 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:45,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:45,385 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:45,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:41:45,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:41:45,586 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)] === [2023-11-29 05:41:45,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:45,586 INFO L85 PathProgramCache]: Analyzing trace with hash -562637636, now seen corresponding path program 2 times [2023-11-29 05:41:45,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:45,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022829297] [2023-11-29 05:41:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:45,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:46,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:46,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022829297] [2023-11-29 05:41:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022829297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:46,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344975280] [2023-11-29 05:41:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:41:46,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:46,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:46,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:46,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:41:46,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:41:46,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:46,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:41:46,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:46,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 05:41:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:46,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:47,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:47,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 05:41:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344975280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:47,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 35 [2023-11-29 05:41:47,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743570409] [2023-11-29 05:41:47,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:47,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 05:41:47,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:47,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 05:41:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:41:47,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-29 05:41:47,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 698 transitions, 9445 flow. Second operand has 36 states, 36 states have (on average 7.444444444444445) internal successors, (268), 36 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:47,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:47,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-29 05:41:47,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:47,061 INFO L124 PetriNetUnfolderBase]: 152447/209442 cut-off events. [2023-11-29 05:42:47,061 INFO L125 PetriNetUnfolderBase]: For 8034416/8034416 co-relation queries the response was YES. [2023-11-29 05:42:49,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732120 conditions, 209442 events. 152447/209442 cut-off events. For 8034416/8034416 co-relation queries the response was YES. Maximal size of possible extension queue 5039. Compared 1467230 event pairs, 59048 based on Foata normal form. 1492/194676 useless extension candidates. Maximal degree in co-relation 1531304. Up to 89352 conditions per place. [2023-11-29 05:42:51,042 INFO L140 encePairwiseOnDemand]: 33/52 looper letters, 1803 selfloop transitions, 427 changer transitions 0/2232 dead transitions. [2023-11-29 05:42:51,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 2232 transitions, 36737 flow [2023-11-29 05:42:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:42:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 05:42:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 574 transitions. [2023-11-29 05:42:51,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2023-11-29 05:42:51,045 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 574 transitions. [2023-11-29 05:42:51,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 574 transitions. [2023-11-29 05:42:51,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:51,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 574 transitions. [2023-11-29 05:42:51,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 20.5) internal successors, (574), 28 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:51,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 52.0) internal successors, (1508), 29 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:51,049 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 52.0) internal successors, (1508), 29 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:51,049 INFO L175 Difference]: Start difference. First operand has 308 places, 698 transitions, 9445 flow. Second operand 28 states and 574 transitions. [2023-11-29 05:42:51,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 2232 transitions, 36737 flow [2023-11-29 05:44:48,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 2232 transitions, 33972 flow, removed 1375 selfloop flow, removed 6 redundant places. [2023-11-29 05:44:48,467 INFO L231 Difference]: Finished difference. Result has 348 places, 963 transitions, 15546 flow [2023-11-29 05:44:48,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=8334, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=15546, PETRI_PLACES=348, PETRI_TRANSITIONS=963} [2023-11-29 05:44:48,468 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 301 predicate places. [2023-11-29 05:44:48,468 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 963 transitions, 15546 flow [2023-11-29 05:44:48,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.444444444444445) internal successors, (268), 36 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:48,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:48,468 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:48,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 05:44:48,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:44:48,669 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)] === [2023-11-29 05:44:48,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash -629511660, now seen corresponding path program 3 times [2023-11-29 05:44:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:48,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315434751] [2023-11-29 05:44:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:48,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:44:49,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:49,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315434751] [2023-11-29 05:44:49,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315434751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:49,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856119469] [2023-11-29 05:44:49,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:44:49,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:49,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:49,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:49,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0cb92ae-c34a-49a3-aa61-de02828e8181/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:44:49,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:44:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:49,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:44:49,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:49,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 05:44:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:49,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:49,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:44:49,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 05:44:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:49,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856119469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:49,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:49,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-11-29 05:44:49,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261846740] [2023-11-29 05:44:49,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:49,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 05:44:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 05:44:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:44:50,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-29 05:44:50,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 963 transitions, 15546 flow. Second operand has 36 states, 36 states have (on average 7.25) internal successors, (261), 36 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:50,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:50,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-29 05:44:50,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand