./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.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_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/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_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/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_466f7e79-e9fe-4a01-9180-d58686ba6f14/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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:41,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:41,573 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:47:41,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:41,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:41,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:41,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:41,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:41,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:41,631 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:41,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:41,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:41,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:41,635 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:41,636 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:41,636 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:41,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:41,637 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:41,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:41,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:41,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:41,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:41,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:41,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:41,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:41,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:41,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:41,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:41,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:41,643 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:41,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:41,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:41,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:41,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:41,646 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:41,646 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:41,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:41,647 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:41,647 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:41,647 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:41,648 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:41,648 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:41,648 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2023-11-26 10:47:42,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:42,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:42,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:42,064 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:42,064 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:42,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-26 10:47:45,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:45,545 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:45,546 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-26 10:47:45,562 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/data/da884ef6c/b1a0c63015034680be836ddf4d1da8b2/FLAG825cf304b [2023-11-26 10:47:45,604 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/data/da884ef6c/b1a0c63015034680be836ddf4d1da8b2 [2023-11-26 10:47:45,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:45,612 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:45,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:45,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:45,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:45,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:45,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b9e216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45, skipping insertion in model container [2023-11-26 10:47:45,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:45,668 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:45,904 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_466f7e79-e9fe-4a01-9180-d58686ba6f14/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-26 10:47:45,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:45,936 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:45,966 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_466f7e79-e9fe-4a01-9180-d58686ba6f14/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-26 10:47:45,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:45,989 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:45,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45 WrapperNode [2023-11-26 10:47:45,990 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:45,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:45,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:45,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:46,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,048 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 282 [2023-11-26 10:47:46,048 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:46,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:46,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:46,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:46,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,068 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,089 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 2, 9, 2]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 3, 1]. [2023-11-26 10:47:46,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,090 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,120 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:46,121 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:46,121 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:46,121 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:46,122 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (1/1) ... [2023-11-26 10:47:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:46,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:46,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:47:46,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:47:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:47:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:47:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:47:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:47:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:47:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:47:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:47:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:47:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:47:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:47:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:47:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:47:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:47:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:47:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:47:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:47:46,236 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 10:47:46,422 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:46,425 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:47,019 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:47,595 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:47,596 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 10:47:47,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:47 BoogieIcfgContainer [2023-11-26 10:47:47,597 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:47,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:47,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:47,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:47,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:45" (1/3) ... [2023-11-26 10:47:47,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e900ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:47, skipping insertion in model container [2023-11-26 10:47:47,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:45" (2/3) ... [2023-11-26 10:47:47,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e900ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:47, skipping insertion in model container [2023-11-26 10:47:47,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:47" (3/3) ... [2023-11-26 10:47:47,609 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-11-26 10:47:47,619 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:47:47,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:47,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:47:47,631 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:47:47,710 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:47:47,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2023-11-26 10:47:47,805 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-26 10:47:47,806 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:47:47,810 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 10:47:47,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2023-11-26 10:47:47,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-26 10:47:47,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:47,843 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;@1ca4b8a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:47,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 10:47:47,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:47:47,862 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-26 10:47:47,863 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:47:47,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:47,864 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 10:47:47,864 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 10:47:47,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash 552748514, now seen corresponding path program 1 times [2023-11-26 10:47:47,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:47,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458398923] [2023-11-26 10:47:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:48,533 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 10:47:48,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:48,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458398923] [2023-11-26 10:47:48,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458398923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:48,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:48,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464254116] [2023-11-26 10:47:48,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:48,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:48,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:48,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:48,599 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 10:47:48,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:48,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:48,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:48,792 INFO L124 PetriNetUnfolderBase]: 223/335 cut-off events. [2023-11-26 10:47:48,792 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-26 10:47:48,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 335 events. 223/335 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2023-11-26 10:47:48,802 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-11-26 10:47:48,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 144 flow [2023-11-26 10:47:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-26 10:47:48,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-11-26 10:47:48,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-26 10:47:48,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-26 10:47:48,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:48,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-26 10:47:48,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 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 10:47:48,826 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 10:47:48,826 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 10:47:48,828 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 46 transitions. [2023-11-26 10:47:48,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 144 flow [2023-11-26 10:47:48,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:47:48,835 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 96 flow [2023-11-26 10:47:48,837 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2023-11-26 10:47:48,841 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-26 10:47:48,841 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 96 flow [2023-11-26 10:47:48,842 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 10:47:48,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:48,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:48,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:47:48,843 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 10:47:48,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash -724749522, now seen corresponding path program 1 times [2023-11-26 10:47:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:48,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497246238] [2023-11-26 10:47:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:48,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:47:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:49,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497246238] [2023-11-26 10:47:49,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497246238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:49,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:49,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:47:49,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876598158] [2023-11-26 10:47:49,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:49,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:49,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:49,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 10:47:49,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:49,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:49,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:49,484 INFO L124 PetriNetUnfolderBase]: 341/506 cut-off events. [2023-11-26 10:47:49,484 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-26 10:47:49,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 506 events. 341/506 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1386 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1010. Up to 335 conditions per place. [2023-11-26 10:47:49,492 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 41 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-11-26 10:47:49,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 217 flow [2023-11-26 10:47:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-26 10:47:49,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-26 10:47:49,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-26 10:47:49,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-26 10:47:49,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:49,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-26 10:47:49,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:49,502 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 10:47:49,502 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 10:47:49,502 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 96 flow. Second operand 3 states and 55 transitions. [2023-11-26 10:47:49,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 217 flow [2023-11-26 10:47:49,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:49,508 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 102 flow [2023-11-26 10:47:49,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-11-26 10:47:49,510 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-11-26 10:47:49,510 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 102 flow [2023-11-26 10:47:49,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 10:47:49,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:49,512 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 10:47:49,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:47:49,513 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 10:47:49,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:49,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1297276284, now seen corresponding path program 1 times [2023-11-26 10:47:49,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:49,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63784414] [2023-11-26 10:47:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:49,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,788 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 10:47:49,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:49,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63784414] [2023-11-26 10:47:49,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63784414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:49,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663084879] [2023-11-26 10:47:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:49,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:49,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:49,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:47:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:49,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:47:49,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:50,053 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 10:47:50,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:50,085 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 10:47:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663084879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:50,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-26 10:47:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053019956] [2023-11-26 10:47:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:50,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:47:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:47:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:50,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:50,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:50,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:50,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:50,301 INFO L124 PetriNetUnfolderBase]: 341/515 cut-off events. [2023-11-26 10:47:50,302 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-26 10:47:50,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 515 events. 341/515 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1353 event pairs, 228 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 1109. Up to 503 conditions per place. [2023-11-26 10:47:50,311 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 26 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2023-11-26 10:47:50,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 220 flow [2023-11-26 10:47:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:47:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-26 10:47:50,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2023-11-26 10:47:50,314 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-26 10:47:50,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-26 10:47:50,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:50,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-26 10:47:50,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,317 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 10:47:50,317 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 10:47:50,318 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 102 flow. Second operand 6 states and 73 transitions. [2023-11-26 10:47:50,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 220 flow [2023-11-26 10:47:50,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:50,322 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 196 flow [2023-11-26 10:47:50,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2023-11-26 10:47:50,323 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-26 10:47:50,323 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 196 flow [2023-11-26 10:47:50,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:50,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:50,324 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 10:47:50,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:50,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,532 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 10:47:50,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1716219622, now seen corresponding path program 2 times [2023-11-26 10:47:50,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:50,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797454382] [2023-11-26 10:47:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797454382] [2023-11-26 10:47:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797454382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070826222] [2023-11-26 10:47:50,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:50,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:50,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:50,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:47:51,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:47:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:51,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:47:51,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 10:47:51,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:51,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070826222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:51,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:51,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-26 10:47:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784007084] [2023-11-26 10:47:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:51,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:51,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:51,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:51,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:51,441 INFO L124 PetriNetUnfolderBase]: 567/861 cut-off events. [2023-11-26 10:47:51,441 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-26 10:47:51,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 861 events. 567/861 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2926 event pairs, 228 based on Foata normal form. 22/725 useless extension candidates. Maximal degree in co-relation 1849. Up to 515 conditions per place. [2023-11-26 10:47:51,464 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 67 selfloop transitions, 3 changer transitions 2/73 dead transitions. [2023-11-26 10:47:51,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 423 flow [2023-11-26 10:47:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:47:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2023-11-26 10:47:51,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-26 10:47:51,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 74 transitions. [2023-11-26 10:47:51,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 74 transitions. [2023-11-26 10:47:51,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:51,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 74 transitions. [2023-11-26 10:47:51,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 10:47:51,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,470 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,470 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 196 flow. Second operand 4 states and 74 transitions. [2023-11-26 10:47:51,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 423 flow [2023-11-26 10:47:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 399 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:51,475 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 192 flow [2023-11-26 10:47:51,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-26 10:47:51,477 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-11-26 10:47:51,477 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 192 flow [2023-11-26 10:47:51,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:51,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:51,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 10:47:51,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:51,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 10:47:51,685 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 10:47:51,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1266254996, now seen corresponding path program 3 times [2023-11-26 10:47:51,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:51,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327907007] [2023-11-26 10:47:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:51,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:51,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327907007] [2023-11-26 10:47:51,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327907007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:51,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432160594] [2023-11-26 10:47:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:47:51,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:51,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:52,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:47:52,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 10:47:52,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:52,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:47:52,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-26 10:47:52,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:52,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432160594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:52,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:52,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-26 10:47:52,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748469418] [2023-11-26 10:47:52,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:52,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:52,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:52,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:52,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:52,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:52,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:52,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:52,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:52,550 INFO L124 PetriNetUnfolderBase]: 625/943 cut-off events. [2023-11-26 10:47:52,550 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2023-11-26 10:47:52,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 943 events. 625/943 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3365 event pairs, 110 based on Foata normal form. 24/835 useless extension candidates. Maximal degree in co-relation 2399. Up to 652 conditions per place. [2023-11-26 10:47:52,558 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 61 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2023-11-26 10:47:52,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 406 flow [2023-11-26 10:47:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:47:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-26 10:47:52,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-11-26 10:47:52,563 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-26 10:47:52,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-26 10:47:52,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:52,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-26 10:47:52,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 10:47:52,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:52,569 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:52,569 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 192 flow. Second operand 4 states and 65 transitions. [2023-11-26 10:47:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 406 flow [2023-11-26 10:47:52,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:52,574 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 217 flow [2023-11-26 10:47:52,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-11-26 10:47:52,577 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2023-11-26 10:47:52,577 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 217 flow [2023-11-26 10:47:52,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:52,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:52,578 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 10:47:52,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:52,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:52,786 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:47:52,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash 707335756, now seen corresponding path program 4 times [2023-11-26 10:47:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:52,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226633171] [2023-11-26 10:47:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:52,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:53,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226633171] [2023-11-26 10:47:53,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226633171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080947919] [2023-11-26 10:47:53,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:47:53,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:53,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:53,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:47:53,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:47:53,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:53,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:47:53,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:53,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:47:53,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080947919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:53,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-26 10:47:53,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609789604] [2023-11-26 10:47:53,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:53,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:47:53,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:47:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:47:53,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:53,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 217 flow. Second operand has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 10:47:53,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:53,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:53,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:53,868 INFO L124 PetriNetUnfolderBase]: 625/946 cut-off events. [2023-11-26 10:47:53,868 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2023-11-26 10:47:53,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2616 conditions, 946 events. 625/946 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3105 event pairs, 418 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 2521. Up to 930 conditions per place. [2023-11-26 10:47:53,877 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-11-26 10:47:53,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 331 flow [2023-11-26 10:47:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:47:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:47:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-26 10:47:53,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203463203463203 [2023-11-26 10:47:53,879 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-26 10:47:53,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-26 10:47:53,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:53,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-26 10:47:53,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 10:47:53,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:47:53,881 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:47:53,881 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 217 flow. Second operand 7 states and 74 transitions. [2023-11-26 10:47:53,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 331 flow [2023-11-26 10:47:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:53,886 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 282 flow [2023-11-26 10:47:53,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=282, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-26 10:47:53,887 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2023-11-26 10:47:53,887 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 282 flow [2023-11-26 10:47:53,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 10:47:53,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:53,887 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:47:53,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:54,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:47:54,094 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 10:47:54,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1838598006, now seen corresponding path program 5 times [2023-11-26 10:47:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:54,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282364459] [2023-11-26 10:47:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:54,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:47:54,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:54,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282364459] [2023-11-26 10:47:54,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282364459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:54,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:54,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:47:54,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077029712] [2023-11-26 10:47:54,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:54,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:54,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:54,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:54,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:54,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:54,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 282 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 10:47:54,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:54,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:55,035 INFO L124 PetriNetUnfolderBase]: 1105/1680 cut-off events. [2023-11-26 10:47:55,036 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2023-11-26 10:47:55,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1680 events. 1105/1680 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6976 event pairs, 406 based on Foata normal form. 20/1450 useless extension candidates. Maximal degree in co-relation 4422. Up to 979 conditions per place. [2023-11-26 10:47:55,049 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 78 selfloop transitions, 3 changer transitions 16/98 dead transitions. [2023-11-26 10:47:55,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 98 transitions, 663 flow [2023-11-26 10:47:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:47:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2023-11-26 10:47:55,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2023-11-26 10:47:55,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2023-11-26 10:47:55,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2023-11-26 10:47:55,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:55,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2023-11-26 10:47:55,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 10:47:55,053 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 10:47:55,054 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 10:47:55,054 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 282 flow. Second operand 5 states and 87 transitions. [2023-11-26 10:47:55,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 98 transitions, 663 flow [2023-11-26 10:47:55,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 98 transitions, 627 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-26 10:47:55,060 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 268 flow [2023-11-26 10:47:55,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-11-26 10:47:55,061 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-26 10:47:55,061 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 268 flow [2023-11-26 10:47:55,061 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 10:47:55,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:55,062 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:47:55,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:47:55,062 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 10:47:55,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:55,063 INFO L85 PathProgramCache]: Analyzing trace with hash -80311858, now seen corresponding path program 6 times [2023-11-26 10:47:55,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:55,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518132064] [2023-11-26 10:47:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:55,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:47:55,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518132064] [2023-11-26 10:47:55,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518132064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:55,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:55,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:47:55,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374261001] [2023-11-26 10:47:55,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:55,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:55,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:55,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:55,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:55,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:55,741 INFO L124 PetriNetUnfolderBase]: 843/1260 cut-off events. [2023-11-26 10:47:55,741 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2023-11-26 10:47:55,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 1260 events. 843/1260 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4674 event pairs, 352 based on Foata normal form. 48/1176 useless extension candidates. Maximal degree in co-relation 3912. Up to 885 conditions per place. [2023-11-26 10:47:55,754 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 69 selfloop transitions, 6 changer transitions 3/79 dead transitions. [2023-11-26 10:47:55,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 535 flow [2023-11-26 10:47:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:47:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-26 10:47:55,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-26 10:47:55,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-26 10:47:55,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-26 10:47:55,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:55,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-26 10:47:55,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,757 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,757 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 268 flow. Second operand 4 states and 69 transitions. [2023-11-26 10:47:55,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 535 flow [2023-11-26 10:47:55,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 518 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:55,764 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 285 flow [2023-11-26 10:47:55,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-26 10:47:55,765 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2023-11-26 10:47:55,766 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 285 flow [2023-11-26 10:47:55,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:55,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:55,766 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:47:55,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:47:55,767 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 10:47:55,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash -897593779, now seen corresponding path program 1 times [2023-11-26 10:47:55,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:55,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454334823] [2023-11-26 10:47:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:55,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:47:56,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:56,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454334823] [2023-11-26 10:47:56,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454334823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:56,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:56,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:47:56,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056745091] [2023-11-26 10:47:56,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:56,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:56,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:56,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:56,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 285 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 10:47:56,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:56,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:56,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:56,638 INFO L124 PetriNetUnfolderBase]: 920/1366 cut-off events. [2023-11-26 10:47:56,638 INFO L125 PetriNetUnfolderBase]: For 2281/2281 co-relation queries the response was YES. [2023-11-26 10:47:56,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 1366 events. 920/1366 cut-off events. For 2281/2281 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5167 event pairs, 293 based on Foata normal form. 14/1240 useless extension candidates. Maximal degree in co-relation 4318. Up to 763 conditions per place. [2023-11-26 10:47:56,652 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 73 selfloop transitions, 6 changer transitions 14/94 dead transitions. [2023-11-26 10:47:56,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 651 flow [2023-11-26 10:47:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:47:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2023-11-26 10:47:56,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2023-11-26 10:47:56,654 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 86 transitions. [2023-11-26 10:47:56,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 86 transitions. [2023-11-26 10:47:56,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:56,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 86 transitions. [2023-11-26 10:47:56,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 10:47:56,657 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 10:47:56,657 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 10:47:56,658 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 285 flow. Second operand 5 states and 86 transitions. [2023-11-26 10:47:56,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 651 flow [2023-11-26 10:47:56,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 611 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-26 10:47:56,665 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 309 flow [2023-11-26 10:47:56,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-26 10:47:56,667 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2023-11-26 10:47:56,668 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 309 flow [2023-11-26 10:47:56,668 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 10:47:56,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:56,668 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:47:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:47:56,669 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 10:47:56,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash 208249095, now seen corresponding path program 2 times [2023-11-26 10:47:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243303572] [2023-11-26 10:47:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:47:57,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:57,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243303572] [2023-11-26 10:47:57,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243303572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:57,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227477955] [2023-11-26 10:47:57,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:57,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:57,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:57,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:57,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:47:57,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:57,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:57,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:47:57,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:47:57,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:47:57,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227477955] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:57,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:57,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-11-26 10:47:57,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336787036] [2023-11-26 10:47:57,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:57,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:47:57,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:57,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 309 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 10:47:57,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:57,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:57,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:57,914 INFO L124 PetriNetUnfolderBase]: 930/1371 cut-off events. [2023-11-26 10:47:57,914 INFO L125 PetriNetUnfolderBase]: For 2500/2500 co-relation queries the response was YES. [2023-11-26 10:47:57,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 1371 events. 930/1371 cut-off events. For 2500/2500 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4972 event pairs, 155 based on Foata normal form. 24/1255 useless extension candidates. Maximal degree in co-relation 4554. Up to 515 conditions per place. [2023-11-26 10:47:57,927 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 91 selfloop transitions, 9 changer transitions 3/104 dead transitions. [2023-11-26 10:47:57,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 752 flow [2023-11-26 10:47:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:47:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-26 10:47:57,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-26 10:47:57,929 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-26 10:47:57,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-26 10:47:57,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:57,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-26 10:47:57,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 10:47:57,931 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 10:47:57,931 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 10:47:57,931 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 309 flow. Second operand 5 states and 83 transitions. [2023-11-26 10:47:57,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 752 flow [2023-11-26 10:47:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 737 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:57,942 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 362 flow [2023-11-26 10:47:57,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-26 10:47:57,943 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2023-11-26 10:47:57,943 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 362 flow [2023-11-26 10:47:57,943 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 10:47:57,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:57,944 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:47:57,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:58,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:47:58,151 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 10:47:58,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash -36227667, now seen corresponding path program 3 times [2023-11-26 10:47:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104708215] [2023-11-26 10:47:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:47:58,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:58,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104708215] [2023-11-26 10:47:58,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104708215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:58,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183801844] [2023-11-26 10:47:58,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:47:58,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:58,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:58,551 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:58,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:47:59,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:47:59,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:59,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:47:59,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:47:59,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:47:59,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183801844] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:59,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:59,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-26 10:47:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252784487] [2023-11-26 10:47:59,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:47:59,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:47:59,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 362 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 10:47:59,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:59,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:47:59,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:59,724 INFO L124 PetriNetUnfolderBase]: 988/1453 cut-off events. [2023-11-26 10:47:59,724 INFO L125 PetriNetUnfolderBase]: For 3293/3293 co-relation queries the response was YES. [2023-11-26 10:47:59,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5089 conditions, 1453 events. 988/1453 cut-off events. For 3293/3293 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5412 event pairs, 301 based on Foata normal form. 24/1333 useless extension candidates. Maximal degree in co-relation 4984. Up to 811 conditions per place. [2023-11-26 10:47:59,740 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 83 selfloop transitions, 10 changer transitions 1/95 dead transitions. [2023-11-26 10:47:59,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 695 flow [2023-11-26 10:47:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:47:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2023-11-26 10:47:59,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2023-11-26 10:47:59,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 84 transitions. [2023-11-26 10:47:59,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 84 transitions. [2023-11-26 10:47:59,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:59,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 84 transitions. [2023-11-26 10:47:59,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 10:47:59,744 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 10:47:59,744 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 10:47:59,744 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 362 flow. Second operand 5 states and 84 transitions. [2023-11-26 10:47:59,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 695 flow [2023-11-26 10:47:59,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 686 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:59,756 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 384 flow [2023-11-26 10:47:59,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-26 10:47:59,757 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2023-11-26 10:47:59,757 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 384 flow [2023-11-26 10:47:59,757 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 10:47:59,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:59,758 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:47:59,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:59,965 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 10:47:59,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1473161755, now seen corresponding path program 4 times [2023-11-26 10:47:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544223840] [2023-11-26 10:47:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:48:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544223840] [2023-11-26 10:48:00,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544223840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:00,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353083056] [2023-11-26 10:48:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:00,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:00,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:00,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:00,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:00,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:48:00,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 384 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 10:48:00,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:00,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:48:00,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:00,782 INFO L124 PetriNetUnfolderBase]: 974/1439 cut-off events. [2023-11-26 10:48:00,783 INFO L125 PetriNetUnfolderBase]: For 3823/3823 co-relation queries the response was YES. [2023-11-26 10:48:00,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 1439 events. 974/1439 cut-off events. For 3823/3823 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5343 event pairs, 315 based on Foata normal form. 14/1309 useless extension candidates. Maximal degree in co-relation 5183. Up to 968 conditions per place. [2023-11-26 10:48:00,800 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 8 changer transitions 16/101 dead transitions. [2023-11-26 10:48:00,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 782 flow [2023-11-26 10:48:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:48:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-26 10:48:00,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-26 10:48:00,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-26 10:48:00,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-26 10:48:00,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:00,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-26 10:48:00,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 10:48:00,804 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 10:48:00,804 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 10:48:00,804 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 384 flow. Second operand 5 states and 83 transitions. [2023-11-26 10:48:00,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 782 flow [2023-11-26 10:48:00,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 754 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-26 10:48:00,818 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 436 flow [2023-11-26 10:48:00,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-26 10:48:00,820 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2023-11-26 10:48:00,820 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 436 flow [2023-11-26 10:48:00,820 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 10:48:00,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:00,821 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:48:00,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:48:00,821 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 10:48:00,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:00,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1593966465, now seen corresponding path program 5 times [2023-11-26 10:48:00,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:00,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472393106] [2023-11-26 10:48:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 10:48:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:01,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472393106] [2023-11-26 10:48:01,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472393106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:01,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:01,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144924415] [2023-11-26 10:48:01,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:01,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:01,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:01,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:48:01,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 436 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 10:48:01,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:01,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:48:01,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:01,631 INFO L124 PetriNetUnfolderBase]: 864/1269 cut-off events. [2023-11-26 10:48:01,632 INFO L125 PetriNetUnfolderBase]: For 3726/3726 co-relation queries the response was YES. [2023-11-26 10:48:01,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 1269 events. 864/1269 cut-off events. For 3726/3726 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4507 event pairs, 259 based on Foata normal form. 24/1157 useless extension candidates. Maximal degree in co-relation 4619. Up to 806 conditions per place. [2023-11-26 10:48:01,647 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 9 changer transitions 4/99 dead transitions. [2023-11-26 10:48:01,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 777 flow [2023-11-26 10:48:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:48:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2023-11-26 10:48:01,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-26 10:48:01,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2023-11-26 10:48:01,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2023-11-26 10:48:01,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:01,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2023-11-26 10:48:01,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 10:48:01,651 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 10:48:01,651 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 10:48:01,651 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 436 flow. Second operand 5 states and 81 transitions. [2023-11-26 10:48:01,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 777 flow [2023-11-26 10:48:01,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 759 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 10:48:01,668 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 434 flow [2023-11-26 10:48:01,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-26 10:48:01,669 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-11-26 10:48:01,669 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 434 flow [2023-11-26 10:48:01,669 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 10:48:01,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:01,670 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:48:01,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:48:01,670 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 10:48:01,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -617366413, now seen corresponding path program 1 times [2023-11-26 10:48:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:01,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698926878] [2023-11-26 10:48:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:03,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:03,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698926878] [2023-11-26 10:48:03,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698926878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969747355] [2023-11-26 10:48:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:03,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:03,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:03,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:03,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:48:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:03,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 10:48:03,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:04,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:04,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-26 10:48:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:04,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:04,765 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-26 10:48:04,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-26 10:48:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:04,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969747355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:04,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:04,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 24 [2023-11-26 10:48:04,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152507941] [2023-11-26 10:48:04,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:04,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:48:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:48:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:48:04,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:48:04,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 434 flow. Second operand has 24 states, 24 states have (on average 6.5) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:04,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:04,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:48:04,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:07,258 INFO L124 PetriNetUnfolderBase]: 1997/2916 cut-off events. [2023-11-26 10:48:07,258 INFO L125 PetriNetUnfolderBase]: For 6854/6854 co-relation queries the response was YES. [2023-11-26 10:48:07,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10411 conditions, 2916 events. 1997/2916 cut-off events. For 6854/6854 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12828 event pairs, 166 based on Foata normal form. 1/2499 useless extension candidates. Maximal degree in co-relation 10302. Up to 928 conditions per place. [2023-11-26 10:48:07,307 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 65 changer transitions 9/232 dead transitions. [2023-11-26 10:48:07,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 232 transitions, 1809 flow [2023-11-26 10:48:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:48:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 10:48:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 232 transitions. [2023-11-26 10:48:07,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41354723707664887 [2023-11-26 10:48:07,310 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 232 transitions. [2023-11-26 10:48:07,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 232 transitions. [2023-11-26 10:48:07,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:07,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 232 transitions. [2023-11-26 10:48:07,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 13.647058823529411) internal successors, (232), 17 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 10:48:07,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 10:48:07,316 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 10:48:07,316 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 434 flow. Second operand 17 states and 232 transitions. [2023-11-26 10:48:07,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 232 transitions, 1809 flow [2023-11-26 10:48:07,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 232 transitions, 1657 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-26 10:48:07,359 INFO L231 Difference]: Finished difference. Result has 88 places, 124 transitions, 1078 flow [2023-11-26 10:48:07,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1078, PETRI_PLACES=88, PETRI_TRANSITIONS=124} [2023-11-26 10:48:07,360 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2023-11-26 10:48:07,360 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 124 transitions, 1078 flow [2023-11-26 10:48:07,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.5) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:48:07,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:07,361 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:48:07,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:07,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:48:07,579 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 10:48:07,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1347741755, now seen corresponding path program 2 times [2023-11-26 10:48:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:07,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612345643] [2023-11-26 10:48:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:09,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:09,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612345643] [2023-11-26 10:48:09,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612345643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:09,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094782993] [2023-11-26 10:48:09,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:48:09,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:09,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:09,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:09,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:48:09,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:48:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:09,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 10:48:09,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:10,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:10,288 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 59 treesize of output 75 [2023-11-26 10:48:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:10,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:11,076 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-26 10:48:11,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-26 10:48:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:11,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094782993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:11,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:11,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2023-11-26 10:48:11,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603086854] [2023-11-26 10:48:11,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:11,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:48:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:48:11,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:48:11,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:48:11,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 124 transitions, 1078 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 10:48:11,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:11,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:48:11,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:14,011 INFO L124 PetriNetUnfolderBase]: 2325/3396 cut-off events. [2023-11-26 10:48:14,011 INFO L125 PetriNetUnfolderBase]: For 11669/11669 co-relation queries the response was YES. [2023-11-26 10:48:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13791 conditions, 3396 events. 2325/3396 cut-off events. For 11669/11669 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15364 event pairs, 254 based on Foata normal form. 1/3397 useless extension candidates. Maximal degree in co-relation 13674. Up to 1135 conditions per place. [2023-11-26 10:48:14,049 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 160 selfloop transitions, 81 changer transitions 46/288 dead transitions. [2023-11-26 10:48:14,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 288 transitions, 2445 flow [2023-11-26 10:48:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 10:48:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 10:48:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 283 transitions. [2023-11-26 10:48:14,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2023-11-26 10:48:14,052 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 283 transitions. [2023-11-26 10:48:14,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 283 transitions. [2023-11-26 10:48:14,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:14,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 283 transitions. [2023-11-26 10:48:14,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 13.476190476190476) internal successors, (283), 21 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 10:48:14,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states 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 10:48:14,058 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 states 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 10:48:14,058 INFO L175 Difference]: Start difference. First operand has 88 places, 124 transitions, 1078 flow. Second operand 21 states and 283 transitions. [2023-11-26 10:48:14,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 288 transitions, 2445 flow [2023-11-26 10:48:14,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 288 transitions, 2402 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-26 10:48:14,141 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1461 flow [2023-11-26 10:48:14,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1461, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2023-11-26 10:48:14,143 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 81 predicate places. [2023-11-26 10:48:14,143 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1461 flow [2023-11-26 10:48:14,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 10:48:14,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:14,144 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:48:14,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:14,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:48:14,350 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:48:14,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1280045217, now seen corresponding path program 3 times [2023-11-26 10:48:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:14,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686315540] [2023-11-26 10:48:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:15,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686315540] [2023-11-26 10:48:15,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686315540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:15,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921385520] [2023-11-26 10:48:15,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:48:15,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:15,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:15,839 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:15,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:48:16,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:48:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:16,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 10:48:16,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:16,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:16,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-26 10:48:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:16,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:17,053 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-26 10:48:17,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-26 10:48:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:17,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921385520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:17,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:17,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-26 10:48:17,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124281289] [2023-11-26 10:48:17,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:17,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:48:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:48:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:48:17,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:48:17,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1461 flow. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 10:48:17,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:17,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:48:17,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:19,393 INFO L124 PetriNetUnfolderBase]: 2080/3047 cut-off events. [2023-11-26 10:48:19,393 INFO L125 PetriNetUnfolderBase]: For 22763/22763 co-relation queries the response was YES. [2023-11-26 10:48:19,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16511 conditions, 3047 events. 2080/3047 cut-off events. For 22763/22763 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13478 event pairs, 341 based on Foata normal form. 1/3048 useless extension candidates. Maximal degree in co-relation 16386. Up to 1182 conditions per place. [2023-11-26 10:48:19,444 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 75 changer transitions 3/236 dead transitions. [2023-11-26 10:48:19,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 236 transitions, 2434 flow [2023-11-26 10:48:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:48:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 10:48:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 206 transitions. [2023-11-26 10:48:19,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2023-11-26 10:48:19,447 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 206 transitions. [2023-11-26 10:48:19,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 206 transitions. [2023-11-26 10:48:19,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:19,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 206 transitions. [2023-11-26 10:48:19,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 10:48:19,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 10:48:19,451 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 10:48:19,452 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1461 flow. Second operand 16 states and 206 transitions. [2023-11-26 10:48:19,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 236 transitions, 2434 flow [2023-11-26 10:48:19,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 236 transitions, 2300 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-11-26 10:48:19,583 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1540 flow [2023-11-26 10:48:19,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1540, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2023-11-26 10:48:19,584 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2023-11-26 10:48:19,584 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1540 flow [2023-11-26 10:48:19,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 10:48:19,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:19,585 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:48:19,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:19,794 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:48:19,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash 879594951, now seen corresponding path program 4 times [2023-11-26 10:48:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:19,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379280000] [2023-11-26 10:48:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:19,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379280000] [2023-11-26 10:48:21,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379280000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57455265] [2023-11-26 10:48:21,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:48:21,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:21,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:21,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:48:21,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:48:21,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:21,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 10:48:21,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:21,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:48:21,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-26 10:48:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:21,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:22,270 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-26 10:48:22,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-26 10:48:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:22,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57455265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:22,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:22,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 23 [2023-11-26 10:48:22,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761523057] [2023-11-26 10:48:22,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:22,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:48:22,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:48:22,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:48:22,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-26 10:48:22,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1540 flow. Second operand has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 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 10:48:22,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:48:22,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-26 10:48:22,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:48:24,932 INFO L124 PetriNetUnfolderBase]: 2096/3078 cut-off events. [2023-11-26 10:48:24,933 INFO L125 PetriNetUnfolderBase]: For 24409/24409 co-relation queries the response was YES. [2023-11-26 10:48:24,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 3078 events. 2096/3078 cut-off events. For 24409/24409 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13696 event pairs, 327 based on Foata normal form. 1/3065 useless extension candidates. Maximal degree in co-relation 16962. Up to 1152 conditions per place. [2023-11-26 10:48:24,967 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 162 selfloop transitions, 85 changer transitions 3/251 dead transitions. [2023-11-26 10:48:24,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 251 transitions, 2562 flow [2023-11-26 10:48:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:48:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 10:48:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 242 transitions. [2023-11-26 10:48:24,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38596491228070173 [2023-11-26 10:48:24,970 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 242 transitions. [2023-11-26 10:48:24,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 242 transitions. [2023-11-26 10:48:24,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:48:24,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 242 transitions. [2023-11-26 10:48:24,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 10:48:24,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 10:48:24,974 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 10:48:24,974 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1540 flow. Second operand 19 states and 242 transitions. [2023-11-26 10:48:24,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 251 transitions, 2562 flow [2023-11-26 10:48:25,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 2445 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-11-26 10:48:25,094 INFO L231 Difference]: Finished difference. Result has 126 places, 150 transitions, 1624 flow [2023-11-26 10:48:25,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1624, PETRI_PLACES=126, PETRI_TRANSITIONS=150} [2023-11-26 10:48:25,095 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2023-11-26 10:48:25,095 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 150 transitions, 1624 flow [2023-11-26 10:48:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 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 10:48:25,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:48:25,096 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 10:48:25,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:25,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:48:25,302 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:48:25,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1725020341, now seen corresponding path program 5 times [2023-11-26 10:48:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:25,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748586912] [2023-11-26 10:48:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:25,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 10:48:26,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:26,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748586912] [2023-11-26 10:48:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748586912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:26,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791447693] [2023-11-26 10:48:26,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:48:26,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:26,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:26,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:26,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_466f7e79-e9fe-4a01-9180-d58686ba6f14/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process