./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme --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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:02:32,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:02:32,108 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:02:32,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:02:32,113 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:02:32,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:02:32,143 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:02:32,143 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:02:32,144 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:02:32,145 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:02:32,146 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:02:32,146 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:02:32,147 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:02:32,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:02:32,148 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:02:32,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:02:32,150 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:02:32,150 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:02:32,151 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:02:32,152 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:02:32,152 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:02:32,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:02:32,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:02:32,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:02:32,155 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:02:32,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:02:32,156 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:02:32,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:02:32,157 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:02:32,157 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:02:32,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:02:32,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:32,159 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:02:32,160 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:02:32,160 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:02:32,160 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:02:32,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:02:32,161 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:02:32,161 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:02:32,162 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:02:32,162 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:02:32,163 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:02:32,163 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_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2023-11-26 12:02:32,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:02:32,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:02:32,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:02:32,519 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:02:32,520 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:02:32,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-26 12:02:35,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:02:35,963 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:02:35,964 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-11-26 12:02:35,977 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/data/e68d1ffbb/4784f70448c2442fb9f8800d236e614c/FLAG53fd7c294 [2023-11-26 12:02:35,996 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/data/e68d1ffbb/4784f70448c2442fb9f8800d236e614c [2023-11-26 12:02:36,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:02:36,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:02:36,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:36,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:02:36,021 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:02:36,022 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,023 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6cdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36, skipping insertion in model container [2023-11-26 12:02:36,024 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,061 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:02:36,334 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_117ad851-7635-4c2f-9509-1b812dd68fb0/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2023-11-26 12:02:36,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:36,371 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:02:36,416 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_117ad851-7635-4c2f-9509-1b812dd68fb0/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2023-11-26 12:02:36,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:36,450 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:02:36,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36 WrapperNode [2023-11-26 12:02:36,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:36,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:36,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:02:36,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:02:36,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,484 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,541 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 283 [2023-11-26 12:02:36,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:36,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:02:36,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:02:36,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:02:36,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,574 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,610 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 9, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 4, 1, 1]. [2023-11-26 12:02:36,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,611 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,631 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,669 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:02:36,675 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:02:36,675 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:02:36,675 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:02:36,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (1/1) ... [2023-11-26 12:02:36,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:36,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:36,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:02:36,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:02:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:02:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:02:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:02:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:02:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:02:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:02:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:02:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:02:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:02:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:02:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:02:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:02:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:02:36,766 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:02:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:02:36,766 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:02:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 12:02:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 12:02:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:02:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:02:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:02:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:02:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:02:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:02:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:02:36,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:02:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:02:36,774 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 12:02:36,955 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:02:36,958 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:02:37,588 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:02:38,090 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:02:38,091 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 12:02:38,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:38 BoogieIcfgContainer [2023-11-26 12:02:38,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:02:38,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:02:38,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:02:38,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:02:38,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:02:36" (1/3) ... [2023-11-26 12:02:38,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218662d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:38, skipping insertion in model container [2023-11-26 12:02:38,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:36" (2/3) ... [2023-11-26 12:02:38,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218662d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:38, skipping insertion in model container [2023-11-26 12:02:38,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:38" (3/3) ... [2023-11-26 12:02:38,104 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-11-26 12:02:38,116 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:02:38,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:02:38,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:02:38,129 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:02:38,217 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 12:02:38,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2023-11-26 12:02:38,315 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-26 12:02:38,315 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:02:38,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-26 12:02:38,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2023-11-26 12:02:38,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-26 12:02:38,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:02:38,361 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;@19d81837, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:02:38,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 12:02:38,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:02:38,377 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-26 12:02:38,377 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:02:38,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:38,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:38,379 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)] === [2023-11-26 12:02:38,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -783779341, now seen corresponding path program 1 times [2023-11-26 12:02:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:38,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139388935] [2023-11-26 12:02:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:02:39,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:39,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139388935] [2023-11-26 12:02:39,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139388935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:39,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:39,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:02:39,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761796558] [2023-11-26 12:02:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:02:39,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:02:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:02:39,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:39,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:39,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:39,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:39,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:39,523 INFO L124 PetriNetUnfolderBase]: 431/637 cut-off events. [2023-11-26 12:02:39,523 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-26 12:02:39,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350 conditions, 637 events. 431/637 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1990 event pairs, 138 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-26 12:02:39,539 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 42 selfloop transitions, 4 changer transitions 1/48 dead transitions. [2023-11-26 12:02:39,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 223 flow [2023-11-26 12:02:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:02:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:02:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-26 12:02:39,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2023-11-26 12:02:39,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-26 12:02:39,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-26 12:02:39,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:39,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-26 12:02:39,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:39,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:39,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:39,574 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 60 transitions. [2023-11-26 12:02:39,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 223 flow [2023-11-26 12:02:39,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 201 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 12:02:39,589 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 90 flow [2023-11-26 12:02:39,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2023-11-26 12:02:39,597 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-26 12:02:39,597 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 90 flow [2023-11-26 12:02:39,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:39,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:39,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:39,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:02:39,599 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)] === [2023-11-26 12:02:39,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash 695678084, now seen corresponding path program 1 times [2023-11-26 12:02:39,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:39,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064839005] [2023-11-26 12:02:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:02:39,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:39,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064839005] [2023-11-26 12:02:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064839005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:39,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:39,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:02:39,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571055805] [2023-11-26 12:02:39,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:39,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:02:39,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:39,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:02:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:02:39,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:39,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:39,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:39,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:39,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:40,313 INFO L124 PetriNetUnfolderBase]: 793/1195 cut-off events. [2023-11-26 12:02:40,313 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-11-26 12:02:40,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2851 conditions, 1195 events. 793/1195 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4346 event pairs, 457 based on Foata normal form. 46/1231 useless extension candidates. Maximal degree in co-relation 1030. Up to 637 conditions per place. [2023-11-26 12:02:40,324 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 65 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2023-11-26 12:02:40,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 81 transitions, 378 flow [2023-11-26 12:02:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:02:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:02:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2023-11-26 12:02:40,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2023-11-26 12:02:40,327 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 98 transitions. [2023-11-26 12:02:40,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 98 transitions. [2023-11-26 12:02:40,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:40,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 98 transitions. [2023-11-26 12:02:40,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,331 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,331 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 90 flow. Second operand 6 states and 98 transitions. [2023-11-26 12:02:40,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 81 transitions, 378 flow [2023-11-26 12:02:40,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 81 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:02:40,335 INFO L231 Difference]: Finished difference. Result has 38 places, 45 transitions, 190 flow [2023-11-26 12:02:40,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=38, PETRI_TRANSITIONS=45} [2023-11-26 12:02:40,337 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-11-26 12:02:40,337 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 45 transitions, 190 flow [2023-11-26 12:02:40,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:40,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:40,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:02:40,338 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)] === [2023-11-26 12:02:40,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1897048753, now seen corresponding path program 1 times [2023-11-26 12:02:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:40,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362853077] [2023-11-26 12:02:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:02:40,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:40,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362853077] [2023-11-26 12:02:40,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362853077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:40,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:40,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:02:40,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789539814] [2023-11-26 12:02:40,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:40,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:02:40,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:02:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:02:40,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:40,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 45 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:40,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:40,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:40,825 INFO L124 PetriNetUnfolderBase]: 691/1063 cut-off events. [2023-11-26 12:02:40,826 INFO L125 PetriNetUnfolderBase]: For 592/592 co-relation queries the response was YES. [2023-11-26 12:02:40,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2726 conditions, 1063 events. 691/1063 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3822 event pairs, 417 based on Foata normal form. 46/1106 useless extension candidates. Maximal degree in co-relation 1605. Up to 637 conditions per place. [2023-11-26 12:02:40,835 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 61 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2023-11-26 12:02:40,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 444 flow [2023-11-26 12:02:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:02:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:02:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2023-11-26 12:02:40,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-11-26 12:02:40,837 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 96 transitions. [2023-11-26 12:02:40,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 96 transitions. [2023-11-26 12:02:40,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:40,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 96 transitions. [2023-11-26 12:02:40,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,840 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,840 INFO L175 Difference]: Start difference. First operand has 38 places, 45 transitions, 190 flow. Second operand 6 states and 96 transitions. [2023-11-26 12:02:40,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 444 flow [2023-11-26 12:02:40,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 12:02:40,846 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 241 flow [2023-11-26 12:02:40,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-11-26 12:02:40,847 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-11-26 12:02:40,847 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 241 flow [2023-11-26 12:02:40,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:40,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:40,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:02:40,848 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)] === [2023-11-26 12:02:40,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1983241255, now seen corresponding path program 1 times [2023-11-26 12:02:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:40,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773696423] [2023-11-26 12:02:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:02:41,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:41,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773696423] [2023-11-26 12:02:41,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773696423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:41,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:41,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:02:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894361132] [2023-11-26 12:02:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:41,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:02:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:02:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:02:41,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:41,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:41,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:41,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:41,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:41,327 INFO L124 PetriNetUnfolderBase]: 575/892 cut-off events. [2023-11-26 12:02:41,327 INFO L125 PetriNetUnfolderBase]: For 869/869 co-relation queries the response was YES. [2023-11-26 12:02:41,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2597 conditions, 892 events. 575/892 cut-off events. For 869/869 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3030 event pairs, 369 based on Foata normal form. 26/915 useless extension candidates. Maximal degree in co-relation 1781. Up to 637 conditions per place. [2023-11-26 12:02:41,335 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 28 selfloop transitions, 6 changer transitions 37/72 dead transitions. [2023-11-26 12:02:41,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 469 flow [2023-11-26 12:02:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:02:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:02:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-26 12:02:41,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2023-11-26 12:02:41,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-26 12:02:41,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-26 12:02:41,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:41,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-26 12:02:41,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:41,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:41,340 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:41,340 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 241 flow. Second operand 6 states and 93 transitions. [2023-11-26 12:02:41,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 469 flow [2023-11-26 12:02:41,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 448 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 12:02:41,347 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 158 flow [2023-11-26 12:02:41,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-11-26 12:02:41,348 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-11-26 12:02:41,348 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 158 flow [2023-11-26 12:02:41,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:41,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:41,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:02:41,349 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)] === [2023-11-26 12:02:41,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1040787600, now seen corresponding path program 1 times [2023-11-26 12:02:41,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455030752] [2023-11-26 12:02:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:41,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:41,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455030752] [2023-11-26 12:02:41,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455030752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916776906] [2023-11-26 12:02:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:41,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:41,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:02:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:41,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:02:41,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:41,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:41,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916776906] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:41,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:41,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 12:02:41,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169719824] [2023-11-26 12:02:41,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:41,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:02:41,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:41,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:02:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:02:41,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:41,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:41,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:41,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:41,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:42,187 INFO L124 PetriNetUnfolderBase]: 416/614 cut-off events. [2023-11-26 12:02:42,188 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-11-26 12:02:42,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 614 events. 416/614 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1878 event pairs, 166 based on Foata normal form. 56/669 useless extension candidates. Maximal degree in co-relation 1856. Up to 427 conditions per place. [2023-11-26 12:02:42,195 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 43 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-26 12:02:42,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 310 flow [2023-11-26 12:02:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:02:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 12:02:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2023-11-26 12:02:42,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2023-11-26 12:02:42,198 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 62 transitions. [2023-11-26 12:02:42,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 62 transitions. [2023-11-26 12:02:42,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:42,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 62 transitions. [2023-11-26 12:02:42,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:42,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:42,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:42,204 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 158 flow. Second operand 5 states and 62 transitions. [2023-11-26 12:02:42,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 310 flow [2023-11-26 12:02:42,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 246 flow, removed 23 selfloop flow, removed 10 redundant places. [2023-11-26 12:02:42,211 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 131 flow [2023-11-26 12:02:42,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-11-26 12:02:42,215 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-26 12:02:42,215 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 131 flow [2023-11-26 12:02:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:42,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:42,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:42,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:42,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:42,423 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)] === [2023-11-26 12:02:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1722484891, now seen corresponding path program 1 times [2023-11-26 12:02:42,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243001967] [2023-11-26 12:02:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:42,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:42,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243001967] [2023-11-26 12:02:42,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243001967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:42,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23758557] [2023-11-26 12:02:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:42,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:42,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:42,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:42,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:02:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:42,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:02:42,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:42,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23758557] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:42,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 12:02:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824519550] [2023-11-26 12:02:42,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:42,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:02:42,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:02:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:02:42,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:42,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:42,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:42,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:43,149 INFO L124 PetriNetUnfolderBase]: 410/602 cut-off events. [2023-11-26 12:02:43,150 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2023-11-26 12:02:43,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 602 events. 410/602 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1819 event pairs, 183 based on Foata normal form. 42/641 useless extension candidates. Maximal degree in co-relation 1628. Up to 460 conditions per place. [2023-11-26 12:02:43,156 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 45 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-11-26 12:02:43,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 288 flow [2023-11-26 12:02:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:02:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 12:02:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2023-11-26 12:02:43,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2023-11-26 12:02:43,158 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 62 transitions. [2023-11-26 12:02:43,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 62 transitions. [2023-11-26 12:02:43,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:43,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 62 transitions. [2023-11-26 12:02:43,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:43,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:43,160 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:43,160 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 131 flow. Second operand 5 states and 62 transitions. [2023-11-26 12:02:43,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 288 flow [2023-11-26 12:02:43,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 270 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-26 12:02:43,163 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 141 flow [2023-11-26 12:02:43,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-11-26 12:02:43,164 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-26 12:02:43,164 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 141 flow [2023-11-26 12:02:43,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:43,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:43,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:43,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:43,371 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)] === [2023-11-26 12:02:43,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash 566843660, now seen corresponding path program 1 times [2023-11-26 12:02:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:43,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468232413] [2023-11-26 12:02:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:02:43,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468232413] [2023-11-26 12:02:43,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468232413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053572796] [2023-11-26 12:02:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:43,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:43,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:43,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:02:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:43,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:02:43,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:02:43,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:02:43,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053572796] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:43,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:43,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 12:02:43,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498985578] [2023-11-26 12:02:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:02:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:02:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:02:43,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:43,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:43,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:43,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:43,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:44,102 INFO L124 PetriNetUnfolderBase]: 468/686 cut-off events. [2023-11-26 12:02:44,102 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2023-11-26 12:02:44,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 686 events. 468/686 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2068 event pairs, 221 based on Foata normal form. 42/725 useless extension candidates. Maximal degree in co-relation 1990. Up to 544 conditions per place. [2023-11-26 12:02:44,108 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 47 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-26 12:02:44,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 312 flow [2023-11-26 12:02:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:02:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 12:02:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2023-11-26 12:02:44,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2023-11-26 12:02:44,110 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 62 transitions. [2023-11-26 12:02:44,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 62 transitions. [2023-11-26 12:02:44,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:44,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 62 transitions. [2023-11-26 12:02:44,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:44,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:44,112 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:44,112 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 141 flow. Second operand 5 states and 62 transitions. [2023-11-26 12:02:44,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 312 flow [2023-11-26 12:02:44,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 294 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-26 12:02:44,115 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 151 flow [2023-11-26 12:02:44,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-11-26 12:02:44,116 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-11-26 12:02:44,116 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 151 flow [2023-11-26 12:02:44,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:44,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:44,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:44,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:44,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:44,322 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)] === [2023-11-26 12:02:44,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2032112774, now seen corresponding path program 1 times [2023-11-26 12:02:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:44,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525596479] [2023-11-26 12:02:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:02:46,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:46,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525596479] [2023-11-26 12:02:46,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525596479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:46,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992564923] [2023-11-26 12:02:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:46,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:46,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:46,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:46,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:02:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:46,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-26 12:02:46,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:46,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 12:02:46,964 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 12:02:46,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-11-26 12:02:47,335 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-26 12:02:47,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-26 12:02:47,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:02:47,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-11-26 12:02:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:47,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:50,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:02:50,755 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 52 treesize of output 40 [2023-11-26 12:02:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992564923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:51,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:02:51,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 26 [2023-11-26 12:02:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439554032] [2023-11-26 12:02:51,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 12:02:51,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 12:02:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:02:51,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:51,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 151 flow. Second operand has 27 states, 27 states have (on average 6.222222222222222) internal successors, (168), 27 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:51,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:51,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:52,298 INFO L124 PetriNetUnfolderBase]: 682/999 cut-off events. [2023-11-26 12:02:52,299 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2023-11-26 12:02:52,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 999 events. 682/999 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3443 event pairs, 31 based on Foata normal form. 1/997 useless extension candidates. Maximal degree in co-relation 3104. Up to 729 conditions per place. [2023-11-26 12:02:52,308 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 73 selfloop transitions, 30 changer transitions 1/105 dead transitions. [2023-11-26 12:02:52,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 105 transitions, 605 flow [2023-11-26 12:02:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:02:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 12:02:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 162 transitions. [2023-11-26 12:02:52,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2023-11-26 12:02:52,311 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 162 transitions. [2023-11-26 12:02:52,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 162 transitions. [2023-11-26 12:02:52,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:52,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 162 transitions. [2023-11-26 12:02:52,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.8) internal successors, (162), 15 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:52,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:52,316 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:52,316 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 151 flow. Second operand 15 states and 162 transitions. [2023-11-26 12:02:52,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 105 transitions, 605 flow [2023-11-26 12:02:52,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 578 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-26 12:02:52,322 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 332 flow [2023-11-26 12:02:52,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=332, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-11-26 12:02:52,325 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-26 12:02:52,325 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 332 flow [2023-11-26 12:02:52,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.222222222222222) internal successors, (168), 27 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:52,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:52,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:52,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:52,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 12:02:52,533 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)] === [2023-11-26 12:02:52,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -234042114, now seen corresponding path program 2 times [2023-11-26 12:02:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:52,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425066771] [2023-11-26 12:02:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:02:54,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:54,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425066771] [2023-11-26 12:02:54,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425066771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:54,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692149661] [2023-11-26 12:02:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:02:54,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:54,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:54,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:54,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:02:54,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:02:54,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:02:54,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 12:02:54,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:54,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:02:54,861 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 28 treesize of output 20 [2023-11-26 12:02:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:54,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:55,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:02:55,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2023-11-26 12:02:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:55,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692149661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:55,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:02:55,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 21 [2023-11-26 12:02:55,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435937651] [2023-11-26 12:02:55,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:55,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:02:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:55,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:02:55,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:02:55,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:55,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 332 flow. Second operand has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:55,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:55,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:55,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:02:56,596 INFO L124 PetriNetUnfolderBase]: 801/1173 cut-off events. [2023-11-26 12:02:56,597 INFO L125 PetriNetUnfolderBase]: For 1633/1633 co-relation queries the response was YES. [2023-11-26 12:02:56,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4355 conditions, 1173 events. 801/1173 cut-off events. For 1633/1633 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4092 event pairs, 147 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 4305. Up to 1000 conditions per place. [2023-11-26 12:02:56,611 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 76 selfloop transitions, 35 changer transitions 1/113 dead transitions. [2023-11-26 12:02:56,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 810 flow [2023-11-26 12:02:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:02:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 12:02:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2023-11-26 12:02:56,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32634032634032634 [2023-11-26 12:02:56,614 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 140 transitions. [2023-11-26 12:02:56,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 140 transitions. [2023-11-26 12:02:56,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:02:56,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 140 transitions. [2023-11-26 12:02:56,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:56,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:56,617 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:56,617 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 332 flow. Second operand 13 states and 140 transitions. [2023-11-26 12:02:56,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 810 flow [2023-11-26 12:02:56,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 113 transitions, 745 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-11-26 12:02:56,625 INFO L231 Difference]: Finished difference. Result has 71 places, 81 transitions, 550 flow [2023-11-26 12:02:56,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=550, PETRI_PLACES=71, PETRI_TRANSITIONS=81} [2023-11-26 12:02:56,627 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-11-26 12:02:56,627 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 81 transitions, 550 flow [2023-11-26 12:02:56,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:56,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:02:56,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:56,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:56,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 12:02:56,835 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)] === [2023-11-26 12:02:56,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:56,835 INFO L85 PathProgramCache]: Analyzing trace with hash -860010222, now seen corresponding path program 3 times [2023-11-26 12:02:56,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:56,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351817369] [2023-11-26 12:02:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:56,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:02:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351817369] [2023-11-26 12:02:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351817369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892176057] [2023-11-26 12:02:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:02:58,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:58,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:58,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:58,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:02:58,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 12:02:58,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:02:58,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 12:02:58,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:58,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:02:58,812 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 28 treesize of output 20 [2023-11-26 12:02:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:58,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:59,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:02:59,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-11-26 12:02:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:02:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892176057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:59,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:02:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 22 [2023-11-26 12:02:59,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369312646] [2023-11-26 12:02:59,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:59,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:02:59,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:59,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:02:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:02:59,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:02:59,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 81 transitions, 550 flow. Second operand has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:02:59,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:02:59,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:02:59,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:00,637 INFO L124 PetriNetUnfolderBase]: 943/1380 cut-off events. [2023-11-26 12:03:00,637 INFO L125 PetriNetUnfolderBase]: For 2939/2939 co-relation queries the response was YES. [2023-11-26 12:03:00,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5639 conditions, 1380 events. 943/1380 cut-off events. For 2939/2939 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5006 event pairs, 184 based on Foata normal form. 1/1381 useless extension candidates. Maximal degree in co-relation 5582. Up to 1181 conditions per place. [2023-11-26 12:03:00,654 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 92 selfloop transitions, 45 changer transitions 1/139 dead transitions. [2023-11-26 12:03:00,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 139 transitions, 1115 flow [2023-11-26 12:03:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:03:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 12:03:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2023-11-26 12:03:00,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34032634032634035 [2023-11-26 12:03:00,657 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 146 transitions. [2023-11-26 12:03:00,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 146 transitions. [2023-11-26 12:03:00,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:00,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 146 transitions. [2023-11-26 12:03:00,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:00,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:00,659 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:00,660 INFO L175 Difference]: Start difference. First operand has 71 places, 81 transitions, 550 flow. Second operand 13 states and 146 transitions. [2023-11-26 12:03:00,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 139 transitions, 1115 flow [2023-11-26 12:03:00,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 139 transitions, 1069 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-11-26 12:03:00,677 INFO L231 Difference]: Finished difference. Result has 84 places, 101 transitions, 823 flow [2023-11-26 12:03:00,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=823, PETRI_PLACES=84, PETRI_TRANSITIONS=101} [2023-11-26 12:03:00,678 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2023-11-26 12:03:00,678 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 101 transitions, 823 flow [2023-11-26 12:03:00,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:00,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:00,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:00,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:00,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:00,886 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)] === [2023-11-26 12:03:00,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash 220072492, now seen corresponding path program 4 times [2023-11-26 12:03:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:00,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514831464] [2023-11-26 12:03:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:02,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:02,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514831464] [2023-11-26 12:03:02,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514831464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:02,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870506150] [2023-11-26 12:03:02,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:03:02,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:02,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:02,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:02,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:03:02,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:03:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:02,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 12:03:02,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:03,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:03,210 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 28 treesize of output 20 [2023-11-26 12:03:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:03,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:03,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:03,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2023-11-26 12:03:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870506150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:03,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:03,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 24 [2023-11-26 12:03:03,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515706245] [2023-11-26 12:03:03,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:03,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:03:03,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:03,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:03:03,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:03:03,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:03:03,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 101 transitions, 823 flow. Second operand has 25 states, 25 states have (on average 6.48) internal successors, (162), 25 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:03,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:03,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:03:03,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:04,887 INFO L124 PetriNetUnfolderBase]: 1075/1573 cut-off events. [2023-11-26 12:03:04,887 INFO L125 PetriNetUnfolderBase]: For 5015/5015 co-relation queries the response was YES. [2023-11-26 12:03:04,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7001 conditions, 1573 events. 1075/1573 cut-off events. For 5015/5015 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5823 event pairs, 271 based on Foata normal form. 1/1574 useless extension candidates. Maximal degree in co-relation 6937. Up to 1368 conditions per place. [2023-11-26 12:03:04,914 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 97 selfloop transitions, 54 changer transitions 1/153 dead transitions. [2023-11-26 12:03:04,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1428 flow [2023-11-26 12:03:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:03:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 12:03:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2023-11-26 12:03:04,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2023-11-26 12:03:04,917 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 150 transitions. [2023-11-26 12:03:04,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 150 transitions. [2023-11-26 12:03:04,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:04,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 150 transitions. [2023-11-26 12:03:04,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.0) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:04,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:04,922 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:04,922 INFO L175 Difference]: Start difference. First operand has 84 places, 101 transitions, 823 flow. Second operand 15 states and 150 transitions. [2023-11-26 12:03:04,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1428 flow [2023-11-26 12:03:04,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 153 transitions, 1340 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-26 12:03:04,959 INFO L231 Difference]: Finished difference. Result has 98 places, 120 transitions, 1121 flow [2023-11-26 12:03:04,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1121, PETRI_PLACES=98, PETRI_TRANSITIONS=120} [2023-11-26 12:03:04,960 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 65 predicate places. [2023-11-26 12:03:04,961 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 120 transitions, 1121 flow [2023-11-26 12:03:04,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.48) internal successors, (162), 25 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:04,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:04,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:04,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 12:03:05,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:05,169 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)] === [2023-11-26 12:03:05,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:05,170 INFO L85 PathProgramCache]: Analyzing trace with hash 9522100, now seen corresponding path program 5 times [2023-11-26 12:03:05,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:05,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487387398] [2023-11-26 12:03:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:05,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:03:06,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:06,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487387398] [2023-11-26 12:03:06,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487387398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:06,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43355749] [2023-11-26 12:03:06,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:03:06,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:06,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:06,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:03:06,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:03:06,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:06,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 12:03:06,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:07,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:07,072 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 28 treesize of output 20 [2023-11-26 12:03:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:07,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:07,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:07,251 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 20 treesize of output 17 [2023-11-26 12:03:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43355749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:07,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:07,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 22 [2023-11-26 12:03:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915503934] [2023-11-26 12:03:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:07,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:03:07,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:03:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:03:07,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:03:07,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 120 transitions, 1121 flow. Second operand has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:07,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:07,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:03:07,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:08,528 INFO L124 PetriNetUnfolderBase]: 1241/1818 cut-off events. [2023-11-26 12:03:08,528 INFO L125 PetriNetUnfolderBase]: For 7706/7706 co-relation queries the response was YES. [2023-11-26 12:03:08,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8671 conditions, 1818 events. 1241/1818 cut-off events. For 7706/7706 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7150 event pairs, 100 based on Foata normal form. 1/1819 useless extension candidates. Maximal degree in co-relation 8600. Up to 1335 conditions per place. [2023-11-26 12:03:08,563 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 101 selfloop transitions, 78 changer transitions 1/181 dead transitions. [2023-11-26 12:03:08,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 181 transitions, 1768 flow [2023-11-26 12:03:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:03:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 12:03:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2023-11-26 12:03:08,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776223776223776 [2023-11-26 12:03:08,566 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 162 transitions. [2023-11-26 12:03:08,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 162 transitions. [2023-11-26 12:03:08,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:08,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 162 transitions. [2023-11-26 12:03:08,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:08,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:08,570 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:08,570 INFO L175 Difference]: Start difference. First operand has 98 places, 120 transitions, 1121 flow. Second operand 13 states and 162 transitions. [2023-11-26 12:03:08,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 181 transitions, 1768 flow [2023-11-26 12:03:08,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 181 transitions, 1684 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-11-26 12:03:08,627 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1357 flow [2023-11-26 12:03:08,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1357, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2023-11-26 12:03:08,628 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 73 predicate places. [2023-11-26 12:03:08,628 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1357 flow [2023-11-26 12:03:08,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:08,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:08,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:08,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:08,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 12:03:08,836 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:03:08,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash 836351564, now seen corresponding path program 6 times [2023-11-26 12:03:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:08,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77212469] [2023-11-26 12:03:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:10,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:10,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77212469] [2023-11-26 12:03:10,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77212469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:10,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913635414] [2023-11-26 12:03:10,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 12:03:10,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:10,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:10,490 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:10,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:03:10,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 12:03:10,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:10,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 12:03:10,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:11,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:11,032 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 28 treesize of output 20 [2023-11-26 12:03:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:11,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:11,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:11,206 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 20 treesize of output 17 [2023-11-26 12:03:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913635414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:11,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:11,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 21 [2023-11-26 12:03:11,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855749269] [2023-11-26 12:03:11,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:11,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:03:11,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:03:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:03:11,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:03:11,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1357 flow. Second operand has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:11,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:11,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:03:11,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:12,508 INFO L124 PetriNetUnfolderBase]: 1331/1951 cut-off events. [2023-11-26 12:03:12,509 INFO L125 PetriNetUnfolderBase]: For 9634/9634 co-relation queries the response was YES. [2023-11-26 12:03:12,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9860 conditions, 1951 events. 1331/1951 cut-off events. For 9634/9634 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7797 event pairs, 176 based on Foata normal form. 1/1952 useless extension candidates. Maximal degree in co-relation 9785. Up to 1606 conditions per place. [2023-11-26 12:03:12,536 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 111 selfloop transitions, 72 changer transitions 1/185 dead transitions. [2023-11-26 12:03:12,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 185 transitions, 2021 flow [2023-11-26 12:03:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:03:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 12:03:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 162 transitions. [2023-11-26 12:03:12,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2023-11-26 12:03:12,538 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 162 transitions. [2023-11-26 12:03:12,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 162 transitions. [2023-11-26 12:03:12,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:12,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 162 transitions. [2023-11-26 12:03:12,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.8) internal successors, (162), 15 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:12,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:12,542 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:12,542 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1357 flow. Second operand 15 states and 162 transitions. [2023-11-26 12:03:12,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 185 transitions, 2021 flow [2023-11-26 12:03:12,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 185 transitions, 1825 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-11-26 12:03:12,607 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1543 flow [2023-11-26 12:03:12,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1543, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2023-11-26 12:03:12,609 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 83 predicate places. [2023-11-26 12:03:12,609 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1543 flow [2023-11-26 12:03:12,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:12,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:12,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:12,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:12,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 12:03:12,816 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:03:12,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1438899892, now seen corresponding path program 7 times [2023-11-26 12:03:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:12,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31031204] [2023-11-26 12:03:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:14,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:14,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31031204] [2023-11-26 12:03:14,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31031204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:14,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249817057] [2023-11-26 12:03:14,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 12:03:14,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:14,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:14,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:03:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:14,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 12:03:14,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:15,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:15,104 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 28 treesize of output 20 [2023-11-26 12:03:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:15,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:15,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:03:15,327 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 20 treesize of output 17 [2023-11-26 12:03:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:03:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249817057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:15,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:15,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 25 [2023-11-26 12:03:15,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490516296] [2023-11-26 12:03:15,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 12:03:15,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 12:03:15,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-11-26 12:03:15,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 12:03:15,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1543 flow. Second operand has 26 states, 26 states have (on average 6.576923076923077) internal successors, (171), 26 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:15,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:15,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 12:03:15,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:16,914 INFO L124 PetriNetUnfolderBase]: 1391/2040 cut-off events. [2023-11-26 12:03:16,914 INFO L125 PetriNetUnfolderBase]: For 10417/10417 co-relation queries the response was YES. [2023-11-26 12:03:16,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10456 conditions, 2040 events. 1391/2040 cut-off events. For 10417/10417 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8259 event pairs, 184 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 10376. Up to 1695 conditions per place. [2023-11-26 12:03:16,950 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 116 selfloop transitions, 74 changer transitions 1/192 dead transitions. [2023-11-26 12:03:16,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 192 transitions, 2132 flow [2023-11-26 12:03:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:03:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 12:03:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 164 transitions. [2023-11-26 12:03:16,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33131313131313134 [2023-11-26 12:03:16,954 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 164 transitions. [2023-11-26 12:03:16,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 164 transitions. [2023-11-26 12:03:16,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:16,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 164 transitions. [2023-11-26 12:03:16,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.933333333333334) internal successors, (164), 15 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:16,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:16,963 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:16,963 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1543 flow. Second operand 15 states and 164 transitions. [2023-11-26 12:03:16,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 192 transitions, 2132 flow [2023-11-26 12:03:17,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 192 transitions, 1954 flow, removed 42 selfloop flow, removed 9 redundant places. [2023-11-26 12:03:17,031 INFO L231 Difference]: Finished difference. Result has 123 places, 147 transitions, 1613 flow [2023-11-26 12:03:17,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1613, PETRI_PLACES=123, PETRI_TRANSITIONS=147} [2023-11-26 12:03:17,032 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 90 predicate places. [2023-11-26 12:03:17,032 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 147 transitions, 1613 flow [2023-11-26 12:03:17,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.576923076923077) internal successors, (171), 26 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:17,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:17,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:17,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_117ad851-7635-4c2f-9509-1b812dd68fb0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:17,240 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 12:03:17,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1015035542, now seen corresponding path program 8 times [2023-11-26 12:03:17,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101398441] [2023-11-26 12:03:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat