./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --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_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:44:36,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:44:36,258 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:44:36,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:44:36,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:44:36,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:44:36,296 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:44:36,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:44:36,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:44:36,298 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:44:36,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:44:36,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:44:36,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:44:36,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:44:36,302 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:44:36,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:44:36,303 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:44:36,304 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:44:36,304 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:44:36,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:44:36,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:44:36,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:44:36,307 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:44:36,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:44:36,308 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:44:36,308 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:44:36,309 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:44:36,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:44:36,310 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:44:36,310 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:44:36,311 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:44:36,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:44:36,312 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:44:36,312 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:44:36,312 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:44:36,313 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:44:36,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:44:36,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:44:36,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:44:36,313 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:44:36,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:44:36,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:44:36,314 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_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2023-11-29 06:44:36,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:44:36,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:44:36,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:44:36,572 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:44:36,572 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:44:36,574 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-29 06:44:39,550 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:44:39,821 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:44:39,821 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/sv-benchmarks/c/pthread/stack_longer-2.i [2023-11-29 06:44:39,839 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/data/3a2237b02/62280a54bedb4d5680d5e8e00b3bf38f/FLAG345464823 [2023-11-29 06:44:39,853 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/data/3a2237b02/62280a54bedb4d5680d5e8e00b3bf38f [2023-11-29 06:44:39,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:44:39,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:44:39,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:44:39,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:44:39,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:44:39,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:44:39" (1/1) ... [2023-11-29 06:44:39,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f9d6344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:39, skipping insertion in model container [2023-11-29 06:44:39,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:44:39" (1/1) ... [2023-11-29 06:44:39,913 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:44:40,352 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_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2023-11-29 06:44:40,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:44:40,397 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:44:40,444 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_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2023-11-29 06:44:40,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:44:40,539 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:44:40,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40 WrapperNode [2023-11-29 06:44:40,540 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:44:40,541 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:44:40,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:44:40,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:44:40,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,611 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2023-11-29 06:44:40,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:44:40,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:44:40,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:44:40,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:44:40,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,632 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,652 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 3, 5, 2, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 2, 0, 1, 1]. [2023-11-29 06:44:40,652 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,673 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,680 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:44:40,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:44:40,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:44:40,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:44:40,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (1/1) ... [2023-11-29 06:44:40,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:44:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:40,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:44:40,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:44:40,760 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 06:44:40,760 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 06:44:40,760 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 06:44:40,761 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 06:44:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:44:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:44:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 06:44:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:44:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:44:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:44:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:44:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:44:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:44:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:44:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:44:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:44:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:44:40,764 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 06:44:40,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:44:40,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:44:40,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:44:40,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:44:40,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:44:40,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:44:40,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:44:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:44:40,767 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:44:40,952 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:44:40,954 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:44:41,212 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:44:41,493 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:44:41,493 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 06:44:41,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:44:41 BoogieIcfgContainer [2023-11-29 06:44:41,494 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:44:41,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:44:41,498 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:44:41,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:44:41,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:44:39" (1/3) ... [2023-11-29 06:44:41,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59246c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:44:41, skipping insertion in model container [2023-11-29 06:44:41,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:40" (2/3) ... [2023-11-29 06:44:41,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59246c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:44:41, skipping insertion in model container [2023-11-29 06:44:41,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:44:41" (3/3) ... [2023-11-29 06:44:41,506 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-11-29 06:44:41,517 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:44:41,530 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:44:41,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-29 06:44:41,531 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:44:41,599 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:44:41,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2023-11-29 06:44:41,684 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2023-11-29 06:44:41,684 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:44:41,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2023-11-29 06:44:41,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2023-11-29 06:44:41,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2023-11-29 06:44:41,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:44:41,712 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;@688e25ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:44:41,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-29 06:44:41,724 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:44:41,724 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-29 06:44:41,724 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 06:44:41,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:41,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:41,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:41,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2023-11-29 06:44:41,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:41,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893140360] [2023-11-29 06:44:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:41,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893140360] [2023-11-29 06:44:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893140360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:42,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:42,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:44:42,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020964697] [2023-11-29 06:44:42,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:42,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:44:42,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:44:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:44:42,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-29 06:44:42,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:42,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:42,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-29 06:44:42,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:42,505 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2023-11-29 06:44:42,505 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-29 06:44:42,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 604 events. 321/604 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2742 event pairs, 57 based on Foata normal form. 45/610 useless extension candidates. Maximal degree in co-relation 1056. Up to 375 conditions per place. [2023-11-29 06:44:42,514 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2023-11-29 06:44:42,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2023-11-29 06:44:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:44:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:44:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2023-11-29 06:44:42,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2023-11-29 06:44:42,530 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 85 transitions. [2023-11-29 06:44:42,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 85 transitions. [2023-11-29 06:44:42,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:42,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 85 transitions. [2023-11-29 06:44:42,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:42,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:42,541 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:42,544 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 85 transitions. [2023-11-29 06:44:42,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 222 flow [2023-11-29 06:44:42,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:44:42,551 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2023-11-29 06:44:42,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-29 06:44:42,558 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-11-29 06:44:42,558 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2023-11-29 06:44:42,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:42,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:42,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:42,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:44:42,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:42,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2023-11-29 06:44:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:42,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135281380] [2023-11-29 06:44:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:42,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:42,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:42,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135281380] [2023-11-29 06:44:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135281380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:44:42,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904955869] [2023-11-29 06:44:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:42,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:42,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:42,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:42,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:44:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:42,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:44:42,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:43,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:43,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:43,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904955869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:43,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:44:43,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 06:44:43,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157017657] [2023-11-29 06:44:43,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:43,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:44:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:44:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:44:43,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:44:43,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:43,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:43,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:44:43,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:44,074 INFO L124 PetriNetUnfolderBase]: 1316/2465 cut-off events. [2023-11-29 06:44:44,075 INFO L125 PetriNetUnfolderBase]: For 306/308 co-relation queries the response was YES. [2023-11-29 06:44:44,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 2465 events. 1316/2465 cut-off events. For 306/308 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13438 event pairs, 164 based on Foata normal form. 52/2411 useless extension candidates. Maximal degree in co-relation 4582. Up to 383 conditions per place. [2023-11-29 06:44:44,096 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 168 selfloop transitions, 32 changer transitions 6/211 dead transitions. [2023-11-29 06:44:44,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 211 transitions, 928 flow [2023-11-29 06:44:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:44:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:44:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2023-11-29 06:44:44,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-29 06:44:44,101 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 320 transitions. [2023-11-29 06:44:44,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 320 transitions. [2023-11-29 06:44:44,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:44,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 320 transitions. [2023-11-29 06:44:44,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 21.333333333333332) internal successors, (320), 15 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,109 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 35.0) internal successors, (560), 16 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,109 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 15 states and 320 transitions. [2023-11-29 06:44:44,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 211 transitions, 928 flow [2023-11-29 06:44:44,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 211 transitions, 924 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:44:44,115 INFO L231 Difference]: Finished difference. Result has 55 places, 67 transitions, 331 flow [2023-11-29 06:44:44,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=331, PETRI_PLACES=55, PETRI_TRANSITIONS=67} [2023-11-29 06:44:44,116 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2023-11-29 06:44:44,116 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 67 transitions, 331 flow [2023-11-29 06:44:44,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:44,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:44,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:44:44,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:44,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:44,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2023-11-29 06:44:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:44,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405196077] [2023-11-29 06:44:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:44,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:44,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:44,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405196077] [2023-11-29 06:44:44,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405196077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:44,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:44,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:44:44,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328933734] [2023-11-29 06:44:44,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:44:44,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:44:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:44:44,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-29 06:44:44,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 67 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:44,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-29 06:44:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:44,687 INFO L124 PetriNetUnfolderBase]: 716/1463 cut-off events. [2023-11-29 06:44:44,687 INFO L125 PetriNetUnfolderBase]: For 615/615 co-relation queries the response was YES. [2023-11-29 06:44:44,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 1463 events. 716/1463 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7623 event pairs, 252 based on Foata normal form. 66/1512 useless extension candidates. Maximal degree in co-relation 3127. Up to 664 conditions per place. [2023-11-29 06:44:44,700 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 45 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-29 06:44:44,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 347 flow [2023-11-29 06:44:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:44:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:44:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-29 06:44:44,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 06:44:44,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-29 06:44:44,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-29 06:44:44,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:44,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-29 06:44:44,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,704 INFO L175 Difference]: Start difference. First operand has 55 places, 67 transitions, 331 flow. Second operand 3 states and 60 transitions. [2023-11-29 06:44:44,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 347 flow [2023-11-29 06:44:44,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 315 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-29 06:44:44,713 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 200 flow [2023-11-29 06:44:44,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-29 06:44:44,714 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-11-29 06:44:44,714 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 200 flow [2023-11-29 06:44:44,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:44,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:44,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:44,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:44:44,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:44,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1587857623, now seen corresponding path program 1 times [2023-11-29 06:44:44,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:44,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308618546] [2023-11-29 06:44:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:44,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308618546] [2023-11-29 06:44:45,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308618546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:45,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:45,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:44:45,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714152072] [2023-11-29 06:44:45,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:45,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:44:45,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:44:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:44:45,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2023-11-29 06:44:45,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:45,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:45,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2023-11-29 06:44:45,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:45,598 INFO L124 PetriNetUnfolderBase]: 894/1823 cut-off events. [2023-11-29 06:44:45,598 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-11-29 06:44:45,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1823 events. 894/1823 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9826 event pairs, 294 based on Foata normal form. 0/1801 useless extension candidates. Maximal degree in co-relation 3739. Up to 1052 conditions per place. [2023-11-29 06:44:45,611 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 59 selfloop transitions, 7 changer transitions 8/86 dead transitions. [2023-11-29 06:44:45,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 454 flow [2023-11-29 06:44:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:44:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:44:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2023-11-29 06:44:45,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 06:44:45,613 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2023-11-29 06:44:45,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2023-11-29 06:44:45,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:45,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2023-11-29 06:44:45,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:45,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:45,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:45,615 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 200 flow. Second operand 5 states and 100 transitions. [2023-11-29 06:44:45,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 454 flow [2023-11-29 06:44:45,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:44:45,622 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 253 flow [2023-11-29 06:44:45,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2023-11-29 06:44:45,623 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-29 06:44:45,623 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 253 flow [2023-11-29 06:44:45,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:45,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:45,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:45,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:44:45,624 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:45,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1957737570, now seen corresponding path program 1 times [2023-11-29 06:44:45,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:45,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146396207] [2023-11-29 06:44:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146396207] [2023-11-29 06:44:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146396207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:44:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477800689] [2023-11-29 06:44:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:46,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:46,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:46,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:44:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:46,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:44:46,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:46,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-11-29 06:44:46,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2023-11-29 06:44:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:44:46,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:44:46,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477800689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:46,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:44:46,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-29 06:44:46,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817122371] [2023-11-29 06:44:46,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:46,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:44:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:46,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:44:46,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:44:46,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:44:46,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:46,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:46,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:44:46,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:46,900 INFO L124 PetriNetUnfolderBase]: 1068/2117 cut-off events. [2023-11-29 06:44:46,900 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2023-11-29 06:44:46,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 2117 events. 1068/2117 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11642 event pairs, 547 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 4216. Up to 1170 conditions per place. [2023-11-29 06:44:46,912 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 53 selfloop transitions, 31 changer transitions 0/89 dead transitions. [2023-11-29 06:44:46,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 530 flow [2023-11-29 06:44:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:44:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:44:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2023-11-29 06:44:46,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-29 06:44:46,914 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 97 transitions. [2023-11-29 06:44:46,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 97 transitions. [2023-11-29 06:44:46,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:46,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 97 transitions. [2023-11-29 06:44:46,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:46,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:46,916 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:46,916 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 253 flow. Second operand 6 states and 97 transitions. [2023-11-29 06:44:46,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 530 flow [2023-11-29 06:44:46,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 522 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 06:44:46,922 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 386 flow [2023-11-29 06:44:46,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-11-29 06:44:46,923 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2023-11-29 06:44:46,923 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 386 flow [2023-11-29 06:44:46,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:46,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:46,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:46,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:44:47,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:47,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:47,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:47,129 INFO L85 PathProgramCache]: Analyzing trace with hash 742439305, now seen corresponding path program 1 times [2023-11-29 06:44:47,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:47,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85837153] [2023-11-29 06:44:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:47,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:44:47,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85837153] [2023-11-29 06:44:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85837153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:44:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6887660] [2023-11-29 06:44:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:47,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:47,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:47,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:47,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:44:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:47,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:44:47,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:47,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:47,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:47,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:44:47,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6887660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:47,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:44:47,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2023-11-29 06:44:47,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489136366] [2023-11-29 06:44:47,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:47,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:44:47,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:44:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:44:47,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:44:47,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:47,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:47,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:44:47,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:48,997 INFO L124 PetriNetUnfolderBase]: 1896/3753 cut-off events. [2023-11-29 06:44:48,997 INFO L125 PetriNetUnfolderBase]: For 2992/2992 co-relation queries the response was YES. [2023-11-29 06:44:49,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 3753 events. 1896/3753 cut-off events. For 2992/2992 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 21983 event pairs, 281 based on Foata normal form. 52/3787 useless extension candidates. Maximal degree in co-relation 8260. Up to 561 conditions per place. [2023-11-29 06:44:49,026 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 180 selfloop transitions, 61 changer transitions 18/264 dead transitions. [2023-11-29 06:44:49,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 264 transitions, 1572 flow [2023-11-29 06:44:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:44:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:44:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 362 transitions. [2023-11-29 06:44:49,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544360902255639 [2023-11-29 06:44:49,031 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 362 transitions. [2023-11-29 06:44:49,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 362 transitions. [2023-11-29 06:44:49,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:49,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 362 transitions. [2023-11-29 06:44:49,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 19.05263157894737) internal successors, (362), 19 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:49,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:49,038 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:49,038 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 386 flow. Second operand 19 states and 362 transitions. [2023-11-29 06:44:49,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 264 transitions, 1572 flow [2023-11-29 06:44:49,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 264 transitions, 1497 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-29 06:44:49,059 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 737 flow [2023-11-29 06:44:49,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=737, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2023-11-29 06:44:49,063 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-11-29 06:44:49,063 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 737 flow [2023-11-29 06:44:49,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.642857142857142) internal successors, (163), 14 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:49,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:49,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:49,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:44:49,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:49,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:49,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash -235686699, now seen corresponding path program 1 times [2023-11-29 06:44:49,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:49,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11997880] [2023-11-29 06:44:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:49,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:50,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:50,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11997880] [2023-11-29 06:44:50,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11997880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:44:50,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531089469] [2023-11-29 06:44:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:50,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:50,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:44:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:50,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:44:50,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:50,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:44:50,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-29 06:44:50,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-11-29 06:44:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:50,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:51,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531089469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:51,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:44:51,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-29 06:44:51,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332248987] [2023-11-29 06:44:51,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:51,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:44:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:44:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:44:51,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:44:51,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 737 flow. Second operand has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:51,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:51,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:44:51,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:53,179 INFO L124 PetriNetUnfolderBase]: 2936/5833 cut-off events. [2023-11-29 06:44:53,179 INFO L125 PetriNetUnfolderBase]: For 6879/6879 co-relation queries the response was YES. [2023-11-29 06:44:53,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14688 conditions, 5833 events. 2936/5833 cut-off events. For 6879/6879 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 33877 event pairs, 455 based on Foata normal form. 48/5871 useless extension candidates. Maximal degree in co-relation 13691. Up to 1003 conditions per place. [2023-11-29 06:44:53,215 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 187 selfloop transitions, 85 changer transitions 30/307 dead transitions. [2023-11-29 06:44:53,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 307 transitions, 2185 flow [2023-11-29 06:44:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:44:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:44:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 371 transitions. [2023-11-29 06:44:53,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2023-11-29 06:44:53,219 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 371 transitions. [2023-11-29 06:44:53,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 371 transitions. [2023-11-29 06:44:53,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:53,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 371 transitions. [2023-11-29 06:44:53,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 17.666666666666668) internal successors, (371), 21 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:53,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:53,223 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:53,223 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 737 flow. Second operand 21 states and 371 transitions. [2023-11-29 06:44:53,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 307 transitions, 2185 flow [2023-11-29 06:44:53,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 307 transitions, 2014 flow, removed 45 selfloop flow, removed 4 redundant places. [2023-11-29 06:44:53,244 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1240 flow [2023-11-29 06:44:53,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1240, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2023-11-29 06:44:53,245 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 74 predicate places. [2023-11-29 06:44:53,245 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1240 flow [2023-11-29 06:44:53,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:53,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:53,246 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-29 06:44:53,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:44:53,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:53,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:53,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:53,447 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2023-11-29 06:44:53,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:53,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351820082] [2023-11-29 06:44:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:53,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351820082] [2023-11-29 06:44:53,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351820082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:44:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966230282] [2023-11-29 06:44:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:44:53,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:53,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:53,745 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:53,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:44:53,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:44:53,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:44:53,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:44:53,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:53,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:54,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:54,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:54,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:44:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:54,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:54,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966230282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:54,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:44:54,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2023-11-29 06:44:54,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28647186] [2023-11-29 06:44:54,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:44:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:44:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=561, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:44:54,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:44:54,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1240 flow. Second operand has 29 states, 29 states have (on average 9.689655172413794) internal successors, (281), 29 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:54,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:54,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:44:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:58,937 INFO L124 PetriNetUnfolderBase]: 9390/18337 cut-off events. [2023-11-29 06:44:58,937 INFO L125 PetriNetUnfolderBase]: For 28352/28352 co-relation queries the response was YES. [2023-11-29 06:44:58,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48692 conditions, 18337 events. 9390/18337 cut-off events. For 28352/28352 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 129195 event pairs, 1848 based on Foata normal form. 178/18513 useless extension candidates. Maximal degree in co-relation 46604. Up to 2793 conditions per place. [2023-11-29 06:44:59,044 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 591 selfloop transitions, 338 changer transitions 36/970 dead transitions. [2023-11-29 06:44:59,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 970 transitions, 7421 flow [2023-11-29 06:44:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 06:44:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-29 06:44:59,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1101 transitions. [2023-11-29 06:44:59,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242857142857142 [2023-11-29 06:44:59,051 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 1101 transitions. [2023-11-29 06:44:59,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 1101 transitions. [2023-11-29 06:44:59,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:59,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 1101 transitions. [2023-11-29 06:44:59,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 18.35) internal successors, (1101), 60 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:59,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 35.0) internal successors, (2135), 61 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:59,063 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 35.0) internal successors, (2135), 61 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:59,063 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1240 flow. Second operand 60 states and 1101 transitions. [2023-11-29 06:44:59,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 970 transitions, 7421 flow [2023-11-29 06:44:59,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 970 transitions, 7243 flow, removed 88 selfloop flow, removed 1 redundant places. [2023-11-29 06:44:59,249 INFO L231 Difference]: Finished difference. Result has 181 places, 405 transitions, 4482 flow [2023-11-29 06:44:59,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4482, PETRI_PLACES=181, PETRI_TRANSITIONS=405} [2023-11-29 06:44:59,250 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 148 predicate places. [2023-11-29 06:44:59,250 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 405 transitions, 4482 flow [2023-11-29 06:44:59,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.689655172413794) internal successors, (281), 29 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:59,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:59,251 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:59,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:44:59,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:59,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:44:59,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1522174711, now seen corresponding path program 2 times [2023-11-29 06:44:59,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:59,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481238070] [2023-11-29 06:44:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:59,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481238070] [2023-11-29 06:45:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481238070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924818153] [2023-11-29 06:45:00,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:45:00,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:00,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:00,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:45:00,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:45:00,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:00,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:45:00,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:00,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:45:00,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2023-11-29 06:45:00,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2023-11-29 06:45:00,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-11-29 06:45:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:01,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:01,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924818153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:01,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:45:01,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2023-11-29 06:45:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574641309] [2023-11-29 06:45:01,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:01,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:45:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:45:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:45:01,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:45:01,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 405 transitions, 4482 flow. Second operand has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:01,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:01,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:45:01,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:45:09,507 INFO L124 PetriNetUnfolderBase]: 16031/31068 cut-off events. [2023-11-29 06:45:09,507 INFO L125 PetriNetUnfolderBase]: For 76950/76950 co-relation queries the response was YES. [2023-11-29 06:45:09,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89271 conditions, 31068 events. 16031/31068 cut-off events. For 76950/76950 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 238503 event pairs, 2681 based on Foata normal form. 232/31298 useless extension candidates. Maximal degree in co-relation 87469. Up to 4824 conditions per place. [2023-11-29 06:45:09,732 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 396 selfloop transitions, 550 changer transitions 42/993 dead transitions. [2023-11-29 06:45:09,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 993 transitions, 10706 flow [2023-11-29 06:45:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 06:45:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 06:45:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 633 transitions. [2023-11-29 06:45:09,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2023-11-29 06:45:09,736 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 633 transitions. [2023-11-29 06:45:09,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 633 transitions. [2023-11-29 06:45:09,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:09,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 633 transitions. [2023-11-29 06:45:09,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 17.583333333333332) internal successors, (633), 36 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:09,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 35.0) internal successors, (1295), 37 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:09,742 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 35.0) internal successors, (1295), 37 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:09,742 INFO L175 Difference]: Start difference. First operand has 181 places, 405 transitions, 4482 flow. Second operand 36 states and 633 transitions. [2023-11-29 06:45:09,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 993 transitions, 10706 flow [2023-11-29 06:45:10,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 993 transitions, 10318 flow, removed 194 selfloop flow, removed 0 redundant places. [2023-11-29 06:45:10,511 INFO L231 Difference]: Finished difference. Result has 227 places, 674 transitions, 8872 flow [2023-11-29 06:45:10,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8872, PETRI_PLACES=227, PETRI_TRANSITIONS=674} [2023-11-29 06:45:10,513 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 194 predicate places. [2023-11-29 06:45:10,513 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 674 transitions, 8872 flow [2023-11-29 06:45:10,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:10,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:10,513 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:10,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:45:10,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:10,714 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:45:10,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1275590689, now seen corresponding path program 1 times [2023-11-29 06:45:10,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:10,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712128670] [2023-11-29 06:45:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:11,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:11,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712128670] [2023-11-29 06:45:11,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712128670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:11,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136252321] [2023-11-29 06:45:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:11,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:11,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:11,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:11,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:45:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:11,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 06:45:11,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:11,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:11,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:11,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:11,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:11,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:45:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:11,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 06:45:12,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136252321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:12,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:45:12,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 8] total 28 [2023-11-29 06:45:12,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774093552] [2023-11-29 06:45:12,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:12,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:45:12,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:45:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:45:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:45:12,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 674 transitions, 8872 flow. Second operand has 28 states, 28 states have (on average 11.178571428571429) internal successors, (313), 28 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:12,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:12,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:45:12,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:45:30,056 INFO L124 PetriNetUnfolderBase]: 34538/66658 cut-off events. [2023-11-29 06:45:30,056 INFO L125 PetriNetUnfolderBase]: For 249615/249615 co-relation queries the response was YES. [2023-11-29 06:45:30,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203907 conditions, 66658 events. 34538/66658 cut-off events. For 249615/249615 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 538182 event pairs, 4700 based on Foata normal form. 702/67358 useless extension candidates. Maximal degree in co-relation 201994. Up to 10311 conditions per place. [2023-11-29 06:45:30,880 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 678 selfloop transitions, 1309 changer transitions 51/2043 dead transitions. [2023-11-29 06:45:30,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 2043 transitions, 25080 flow [2023-11-29 06:45:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 06:45:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-11-29 06:45:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1174 transitions. [2023-11-29 06:45:30,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516043956043956 [2023-11-29 06:45:30,885 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 1174 transitions. [2023-11-29 06:45:30,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 1174 transitions. [2023-11-29 06:45:30,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:30,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 1174 transitions. [2023-11-29 06:45:30,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 18.06153846153846) internal successors, (1174), 65 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:30,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 35.0) internal successors, (2310), 66 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:30,892 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 35.0) internal successors, (2310), 66 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:30,892 INFO L175 Difference]: Start difference. First operand has 227 places, 674 transitions, 8872 flow. Second operand 65 states and 1174 transitions. [2023-11-29 06:45:30,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 2043 transitions, 25080 flow [2023-11-29 06:45:33,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 2043 transitions, 24836 flow, removed 121 selfloop flow, removed 1 redundant places. [2023-11-29 06:45:34,012 INFO L231 Difference]: Finished difference. Result has 302 places, 1434 transitions, 22120 flow [2023-11-29 06:45:34,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8766, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=22120, PETRI_PLACES=302, PETRI_TRANSITIONS=1434} [2023-11-29 06:45:34,013 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 269 predicate places. [2023-11-29 06:45:34,013 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 1434 transitions, 22120 flow [2023-11-29 06:45:34,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.178571428571429) internal successors, (313), 28 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:34,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:34,013 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:34,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:45:34,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:45:34,214 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:45:34,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1054889729, now seen corresponding path program 3 times [2023-11-29 06:45:34,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383363600] [2023-11-29 06:45:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:42,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:42,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383363600] [2023-11-29 06:45:42,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383363600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:42,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308464405] [2023-11-29 06:45:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:45:42,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:42,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:42,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:42,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:45:42,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:45:42,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:42,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 06:45:42,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:42,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:45:43,031 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-11-29 06:45:43,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 19 [2023-11-29 06:45:43,316 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-11-29 06:45:43,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 19 [2023-11-29 06:45:43,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2023-11-29 06:45:44,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:45:44,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 38 [2023-11-29 06:45:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:44,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:46,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308464405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:46,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:45:46,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 35 [2023-11-29 06:45:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217047153] [2023-11-29 06:45:46,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:46,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 06:45:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 06:45:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 06:45:46,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:45:46,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1434 transitions, 22120 flow. Second operand has 35 states, 35 states have (on average 10.485714285714286) internal successors, (367), 35 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:46,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:46,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:45:46,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:46:05,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:07,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:48:00,235 INFO L124 PetriNetUnfolderBase]: 104627/201628 cut-off events. [2023-11-29 06:48:00,236 INFO L125 PetriNetUnfolderBase]: For 876566/876566 co-relation queries the response was YES. [2023-11-29 06:48:01,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651641 conditions, 201628 events. 104627/201628 cut-off events. For 876566/876566 co-relation queries the response was YES. Maximal size of possible extension queue 1732. Compared 1917295 event pairs, 13567 based on Foata normal form. 360/201986 useless extension candidates. Maximal degree in co-relation 649262. Up to 31476 conditions per place. [2023-11-29 06:48:02,263 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 1055 selfloop transitions, 4319 changer transitions 93/5472 dead transitions. [2023-11-29 06:48:02,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 5472 transitions, 85002 flow [2023-11-29 06:48:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-11-29 06:48:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2023-11-29 06:48:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 1830 transitions. [2023-11-29 06:48:02,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546583850931677 [2023-11-29 06:48:02,267 INFO L72 ComplementDD]: Start complementDD. Operand 115 states and 1830 transitions. [2023-11-29 06:48:02,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 1830 transitions. [2023-11-29 06:48:02,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:02,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 115 states and 1830 transitions. [2023-11-29 06:48:02,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 116 states, 115 states have (on average 15.91304347826087) internal successors, (1830), 115 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:02,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 116 states, 116 states have (on average 35.0) internal successors, (4060), 116 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:02,277 INFO L81 ComplementDD]: Finished complementDD. Result has 116 states, 116 states have (on average 35.0) internal successors, (4060), 116 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:02,277 INFO L175 Difference]: Start difference. First operand has 302 places, 1434 transitions, 22120 flow. Second operand 115 states and 1830 transitions. [2023-11-29 06:48:02,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 5472 transitions, 85002 flow [2023-11-29 06:48:26,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 5472 transitions, 83856 flow, removed 567 selfloop flow, removed 1 redundant places. [2023-11-29 06:48:26,255 INFO L231 Difference]: Finished difference. Result has 431 places, 4516 transitions, 79776 flow [2023-11-29 06:48:26,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=21815, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=115, PETRI_FLOW=79776, PETRI_PLACES=431, PETRI_TRANSITIONS=4516} [2023-11-29 06:48:26,256 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 398 predicate places. [2023-11-29 06:48:26,256 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 4516 transitions, 79776 flow [2023-11-29 06:48:26,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 10.485714285714286) internal successors, (367), 35 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:26,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:26,257 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:26,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:48:26,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:48:26,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:48:26,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:26,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1389488245, now seen corresponding path program 2 times [2023-11-29 06:48:26,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:26,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10594022] [2023-11-29 06:48:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 12 proven. 140 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:48:27,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:27,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10594022] [2023-11-29 06:48:27,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10594022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:27,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551447844] [2023-11-29 06:48:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:48:27,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:27,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:27,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:48:27,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:48:27,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:27,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 06:48:27,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:27,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:27,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:27,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:27,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:27,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:27,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:48:27,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-11-29 06:48:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:48:27,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 06:48:27,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551447844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:27,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:27,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24, 8] total 38 [2023-11-29 06:48:27,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657322496] [2023-11-29 06:48:27,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:27,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 06:48:27,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 06:48:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:48:27,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:48:27,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 4516 transitions, 79776 flow. Second operand has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:27,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:27,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:48:27,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:53:08,434 INFO L124 PetriNetUnfolderBase]: 191739/370222 cut-off events. [2023-11-29 06:53:08,434 INFO L125 PetriNetUnfolderBase]: For 2180633/2180633 co-relation queries the response was YES. [2023-11-29 06:53:12,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288016 conditions, 370222 events. 191739/370222 cut-off events. For 2180633/2180633 co-relation queries the response was YES. Maximal size of possible extension queue 2415. Compared 3757854 event pairs, 44634 based on Foata normal form. 1380/371602 useless extension candidates. Maximal degree in co-relation 1286934. Up to 57274 conditions per place. [2023-11-29 06:53:13,232 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 1136 selfloop transitions, 7814 changer transitions 0/8955 dead transitions. [2023-11-29 06:53:13,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 8955 transitions, 167553 flow [2023-11-29 06:53:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 06:53:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 06:53:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 819 transitions. [2023-11-29 06:53:13,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508695652173913 [2023-11-29 06:53:13,234 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 819 transitions. [2023-11-29 06:53:13,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 819 transitions. [2023-11-29 06:53:13,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:53:13,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 819 transitions. [2023-11-29 06:53:13,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 17.804347826086957) internal successors, (819), 46 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:53:13,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 35.0) internal successors, (1645), 47 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:53:13,238 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 35.0) internal successors, (1645), 47 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:53:13,238 INFO L175 Difference]: Start difference. First operand has 431 places, 4516 transitions, 79776 flow. Second operand 46 states and 819 transitions. [2023-11-29 06:53:13,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 8955 transitions, 167553 flow [2023-11-29 06:55:17,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 8955 transitions, 163721 flow, removed 1077 selfloop flow, removed 10 redundant places. [2023-11-29 06:55:17,543 INFO L231 Difference]: Finished difference. Result has 493 places, 8321 transitions, 169699 flow [2023-11-29 06:55:17,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=77016, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=169699, PETRI_PLACES=493, PETRI_TRANSITIONS=8321} [2023-11-29 06:55:17,547 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 460 predicate places. [2023-11-29 06:55:17,547 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 8321 transitions, 169699 flow [2023-11-29 06:55:17,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:17,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:17,547 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-29 06:55:17,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:55:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:17,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 06:55:17,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1297943087, now seen corresponding path program 3 times [2023-11-29 06:55:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934579215] [2023-11-29 06:55:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:18,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:18,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934579215] [2023-11-29 06:55:18,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934579215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:18,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603728710] [2023-11-29 06:55:18,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:55:18,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:18,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:18,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:18,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aa045d6-c0f4-4cf6-87ab-9e4e3f9c94a0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:55:19,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 06:55:19,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:19,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 06:55:19,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:19,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:19,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:20,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603728710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:20,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:20,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 22] total 54 [2023-11-29 06:55:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151365954] [2023-11-29 06:55:20,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-29 06:55:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-29 06:55:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=2059, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 06:55:20,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 06:55:20,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 8321 transitions, 169699 flow. Second operand has 55 states, 55 states have (on average 9.981818181818182) internal successors, (549), 55 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:20,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:20,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 06:55:20,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand