./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX --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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:23:24,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:23:24,210 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 16:23:24,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:23:24,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:23:24,255 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:23:24,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:23:24,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:23:24,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:23:24,259 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:23:24,259 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:23:24,260 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:23:24,260 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:23:24,261 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:23:24,261 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:23:24,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:23:24,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 16:23:24,264 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:23:24,264 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:23:24,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:23:24,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:23:24,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 16:23:24,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:23:24,270 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 16:23:24,270 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:23:24,270 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:23:24,270 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 16:23:24,271 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:23:24,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:23:24,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:23:24,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:23:24,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:23:24,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:23:24,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:23:24,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:23:24,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 16:23:24,276 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:23:24,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:23:24,276 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:23:24,276 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:23:24,277 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:23:24,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:23:24,278 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_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2024-11-08 16:23:24,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:23:24,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:23:24,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:23:24,601 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:23:24,602 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:23:24,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c Unable to find full path for "g++" [2024-11-08 16:23:26,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:23:26,857 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:23:26,857 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-11-08 16:23:26,865 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/data/5170b7751/ca063c01a4364d44b0c7fef4a517b2f6/FLAG3325aac00 [2024-11-08 16:23:26,879 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/data/5170b7751/ca063c01a4364d44b0c7fef4a517b2f6 [2024-11-08 16:23:26,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:23:26,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:23:26,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:23:26,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:23:26,888 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:23:26,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:23:26" (1/1) ... [2024-11-08 16:23:26,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cacccb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:26, skipping insertion in model container [2024-11-08 16:23:26,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:23:26" (1/1) ... [2024-11-08 16:23:26,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:23:27,127 WARN L250 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_61f5c811-37b6-4aac-bcb2-9042326feb84/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-08 16:23:27,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:23:27,142 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:23:27,165 WARN L250 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_61f5c811-37b6-4aac-bcb2-9042326feb84/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2024-11-08 16:23:27,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:23:27,185 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:23:27,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27 WrapperNode [2024-11-08 16:23:27,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:23:27,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:23:27,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:23:27,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:23:27,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,216 INFO L138 Inliner]: procedures = 20, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 48 [2024-11-08 16:23:27,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:23:27,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:23:27,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:23:27,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:23:27,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,231 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,245 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-08 16:23:27,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,246 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,257 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:23:27,264 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:23:27,264 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:23:27,268 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:23:27,269 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (1/1) ... [2024-11-08 16:23:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:23:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:23:27,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:23:27,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:23:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:23:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:23:27,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:23:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:23:27,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:23:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:23:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 16:23:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 16:23:27,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:23:27,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:23:27,328 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:23:27,422 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:23:27,424 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:23:27,609 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:23:27,609 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:23:27,809 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:23:27,810 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 16:23:27,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:23:27 BoogieIcfgContainer [2024-11-08 16:23:27,811 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:23:27,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:23:27,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:23:27,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:23:27,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:23:26" (1/3) ... [2024-11-08 16:23:27,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee1dc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:23:27, skipping insertion in model container [2024-11-08 16:23:27,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:23:27" (2/3) ... [2024-11-08 16:23:27,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee1dc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:23:27, skipping insertion in model container [2024-11-08 16:23:27,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:23:27" (3/3) ... [2024-11-08 16:23:27,824 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2024-11-08 16:23:27,843 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:23:27,844 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 16:23:27,844 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:23:27,909 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 16:23:27,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 76 flow [2024-11-08 16:23:27,998 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-11-08 16:23:27,998 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 16:23:28,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 4/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-08 16:23:28,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 76 flow [2024-11-08 16:23:28,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 28 transitions, 68 flow [2024-11-08 16:23:28,016 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:23:28,023 INFO L333 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, 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;@1663defd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:23:28,024 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-08 16:23:28,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:23:28,038 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-08 16:23:28,038 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 16:23:28,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:23:28,039 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:23:28,040 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:23:28,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:23:28,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1078656732, now seen corresponding path program 1 times [2024-11-08 16:23:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:23:28,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867731703] [2024-11-08 16:23:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:23:28,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:23:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:23:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:23:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867731703] [2024-11-08 16:23:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867731703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:23:28,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:23:28,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:23:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891303648] [2024-11-08 16:23:28,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:23:28,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:23:28,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:23:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:23:28,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:23:28,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 31 [2024-11-08 16:23:28,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:28,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:23:28,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 31 [2024-11-08 16:23:28,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:23:28,915 INFO L124 PetriNetUnfolderBase]: 113/236 cut-off events. [2024-11-08 16:23:28,915 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-08 16:23:28,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 236 events. 113/236 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 953 event pairs, 24 based on Foata normal form. 28/239 useless extension candidates. Maximal degree in co-relation 399. Up to 98 conditions per place. [2024-11-08 16:23:28,920 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 29 selfloop transitions, 5 changer transitions 2/47 dead transitions. [2024-11-08 16:23:28,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 181 flow [2024-11-08 16:23:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:23:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:23:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-08 16:23:28,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6774193548387096 [2024-11-08 16:23:28,936 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 5 states and 105 transitions. [2024-11-08 16:23:28,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 181 flow [2024-11-08 16:23:28,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:23:28,943 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 101 flow [2024-11-08 16:23:28,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-11-08 16:23:28,948 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-11-08 16:23:28,948 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 101 flow [2024-11-08 16:23:28,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:28,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:23:28,949 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:23:28,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:23:28,949 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:23:28,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:23:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1777589580, now seen corresponding path program 1 times [2024-11-08 16:23:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:23:28,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036681129] [2024-11-08 16:23:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:23:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:23:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:23:29,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:23:29,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036681129] [2024-11-08 16:23:29,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036681129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:23:29,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11851327] [2024-11-08 16:23:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:23:29,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:23:29,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:23:29,953 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:23:29,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:23:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:23:30,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 16:23:30,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:23:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:23:38,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:23:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:23:39,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11851327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:23:39,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:23:39,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-08 16:23:39,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381297999] [2024-11-08 16:23:39,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:23:39,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 16:23:39,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:23:39,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 16:23:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=254, Unknown=2, NotChecked=0, Total=342 [2024-11-08 16:23:39,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-08 16:23:39,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 101 flow. Second operand has 19 states, 19 states have (on average 8.0) internal successors, (152), 19 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:23:39,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:23:39,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-08 16:23:39,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:23:52,435 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:24:00,603 WARN L286 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 38 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:24:12,770 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 28 DAG size of output: 24 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:24:16,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:24:30,724 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 36 DAG size of output: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:24:34,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:24:39,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:24:41,492 INFO L124 PetriNetUnfolderBase]: 1906/3022 cut-off events. [2024-11-08 16:24:41,492 INFO L125 PetriNetUnfolderBase]: For 764/764 co-relation queries the response was YES. [2024-11-08 16:24:41,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7045 conditions, 3022 events. 1906/3022 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14626 event pairs, 55 based on Foata normal form. 3/2720 useless extension candidates. Maximal degree in co-relation 2838. Up to 518 conditions per place. [2024-11-08 16:24:41,509 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 221 selfloop transitions, 91 changer transitions 60/375 dead transitions. [2024-11-08 16:24:41,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 375 transitions, 1795 flow [2024-11-08 16:24:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-08 16:24:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-08 16:24:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 563 transitions. [2024-11-08 16:24:41,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46567411083540117 [2024-11-08 16:24:41,515 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 101 flow. Second operand 39 states and 563 transitions. [2024-11-08 16:24:41,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 375 transitions, 1795 flow [2024-11-08 16:24:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 375 transitions, 1786 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:24:41,524 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 831 flow [2024-11-08 16:24:41,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=831, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-11-08 16:24:41,525 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 66 predicate places. [2024-11-08 16:24:41,525 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 831 flow [2024-11-08 16:24:41,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.0) internal successors, (152), 19 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:41,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:24:41,526 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:24:41,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:24:41,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:41,730 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:24:41,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:24:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash -931428406, now seen corresponding path program 2 times [2024-11-08 16:24:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:24:41,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076956177] [2024-11-08 16:24:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:24:41,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:24:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:42,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:24:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076956177] [2024-11-08 16:24:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076956177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:24:42,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:24:42,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:24:42,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686597402] [2024-11-08 16:24:42,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:24:42,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:24:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:24:42,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:24:42,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:24:42,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-11-08 16:24:42,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 831 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:42,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:24:42,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-11-08 16:24:42,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:24:42,623 INFO L124 PetriNetUnfolderBase]: 1140/2078 cut-off events. [2024-11-08 16:24:42,623 INFO L125 PetriNetUnfolderBase]: For 13984/14172 co-relation queries the response was YES. [2024-11-08 16:24:42,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7780 conditions, 2078 events. 1140/2078 cut-off events. For 13984/14172 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11519 event pairs, 33 based on Foata normal form. 181/2250 useless extension candidates. Maximal degree in co-relation 7731. Up to 543 conditions per place. [2024-11-08 16:24:42,649 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 171 selfloop transitions, 58 changer transitions 0/240 dead transitions. [2024-11-08 16:24:42,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 240 transitions, 2047 flow [2024-11-08 16:24:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:24:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 16:24:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-11-08 16:24:42,651 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4659498207885305 [2024-11-08 16:24:42,651 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 831 flow. Second operand 9 states and 130 transitions. [2024-11-08 16:24:42,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 240 transitions, 2047 flow [2024-11-08 16:24:42,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 240 transitions, 1974 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-11-08 16:24:42,709 INFO L231 Difference]: Finished difference. Result has 103 places, 151 transitions, 1228 flow [2024-11-08 16:24:42,710 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1228, PETRI_PLACES=103, PETRI_TRANSITIONS=151} [2024-11-08 16:24:42,712 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-11-08 16:24:42,712 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 151 transitions, 1228 flow [2024-11-08 16:24:42,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:42,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:24:42,713 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:24:42,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:24:42,713 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:24:42,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:24:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash -422926446, now seen corresponding path program 1 times [2024-11-08 16:24:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:24:42,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362288019] [2024-11-08 16:24:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:24:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:24:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:24:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362288019] [2024-11-08 16:24:43,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362288019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:24:43,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072965728] [2024-11-08 16:24:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:24:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:24:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:24:43,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:24:43,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:24:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:24:43,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 16:24:43,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:24:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:44,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:24:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:24:45,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072965728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:24:45,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:24:45,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2024-11-08 16:24:45,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908236513] [2024-11-08 16:24:45,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:24:45,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:24:45,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:24:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:24:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:24:46,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-11-08 16:24:46,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 151 transitions, 1228 flow. Second operand has 24 states, 24 states have (on average 13.541666666666666) internal successors, (325), 24 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:24:46,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:24:46,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-11-08 16:24:46,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:25:02,631 WARN L286 SmtUtils]: Spent 12.20s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:25:08,873 INFO L124 PetriNetUnfolderBase]: 2603/5432 cut-off events. [2024-11-08 16:25:08,873 INFO L125 PetriNetUnfolderBase]: For 32308/32562 co-relation queries the response was YES. [2024-11-08 16:25:08,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21270 conditions, 5432 events. 2603/5432 cut-off events. For 32308/32562 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 41672 event pairs, 105 based on Foata normal form. 133/5455 useless extension candidates. Maximal degree in co-relation 18332. Up to 835 conditions per place. [2024-11-08 16:25:08,942 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 253 selfloop transitions, 222 changer transitions 90/592 dead transitions. [2024-11-08 16:25:08,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 592 transitions, 5869 flow [2024-11-08 16:25:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-08 16:25:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-08 16:25:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 877 transitions. [2024-11-08 16:25:08,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5547122074636306 [2024-11-08 16:25:08,946 INFO L175 Difference]: Start difference. First operand has 103 places, 151 transitions, 1228 flow. Second operand 51 states and 877 transitions. [2024-11-08 16:25:08,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 592 transitions, 5869 flow [2024-11-08 16:25:09,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 592 transitions, 5767 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-11-08 16:25:09,078 INFO L231 Difference]: Finished difference. Result has 170 places, 344 transitions, 4033 flow [2024-11-08 16:25:09,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=4033, PETRI_PLACES=170, PETRI_TRANSITIONS=344} [2024-11-08 16:25:09,079 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 139 predicate places. [2024-11-08 16:25:09,079 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 344 transitions, 4033 flow [2024-11-08 16:25:09,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.541666666666666) internal successors, (325), 24 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:09,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:25:09,080 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:25:09,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:25:09,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:09,281 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:25:09,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:25:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1477893182, now seen corresponding path program 2 times [2024-11-08 16:25:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:25:09,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928553692] [2024-11-08 16:25:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:25:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:25:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:25:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:25:10,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:25:10,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928553692] [2024-11-08 16:25:10,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928553692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:25:10,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028027167] [2024-11-08 16:25:10,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:25:10,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:10,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:25:10,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:25:10,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:25:10,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:25:10,716 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:25:10,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 16:25:10,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:25:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:25:12,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:25:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:25:14,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028027167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:25:14,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:25:14,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-11-08 16:25:14,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586159355] [2024-11-08 16:25:14,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:25:14,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 16:25:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:25:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 16:25:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2024-11-08 16:25:14,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-11-08 16:25:14,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 344 transitions, 4033 flow. Second operand has 31 states, 31 states have (on average 13.0) internal successors, (403), 31 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:14,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:25:14,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-11-08 16:25:14,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:25:34,300 WARN L286 SmtUtils]: Spent 12.60s on a formula simplification. DAG size of input: 91 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:25:42,541 INFO L124 PetriNetUnfolderBase]: 4026/8340 cut-off events. [2024-11-08 16:25:42,542 INFO L125 PetriNetUnfolderBase]: For 56749/57359 co-relation queries the response was YES. [2024-11-08 16:25:42,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36527 conditions, 8340 events. 4026/8340 cut-off events. For 56749/57359 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 68111 event pairs, 114 based on Foata normal form. 369/8576 useless extension candidates. Maximal degree in co-relation 36403. Up to 1398 conditions per place. [2024-11-08 16:25:42,684 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 336 selfloop transitions, 405 changer transitions 117/885 dead transitions. [2024-11-08 16:25:42,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 885 transitions, 10819 flow [2024-11-08 16:25:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-08 16:25:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-11-08 16:25:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1148 transitions. [2024-11-08 16:25:42,693 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5366993922393641 [2024-11-08 16:25:42,693 INFO L175 Difference]: Start difference. First operand has 170 places, 344 transitions, 4033 flow. Second operand 69 states and 1148 transitions. [2024-11-08 16:25:42,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 885 transitions, 10819 flow [2024-11-08 16:25:43,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 885 transitions, 9906 flow, removed 433 selfloop flow, removed 18 redundant places. [2024-11-08 16:25:43,168 INFO L231 Difference]: Finished difference. Result has 238 places, 600 transitions, 8131 flow [2024-11-08 16:25:43,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=8131, PETRI_PLACES=238, PETRI_TRANSITIONS=600} [2024-11-08 16:25:43,171 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 207 predicate places. [2024-11-08 16:25:43,173 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 600 transitions, 8131 flow [2024-11-08 16:25:43,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 13.0) internal successors, (403), 31 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:25:43,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:25:43,174 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:25:43,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:25:43,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:43,378 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:25:43,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:25:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash 240786564, now seen corresponding path program 3 times [2024-11-08 16:25:43,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:25:43,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29221513] [2024-11-08 16:25:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:25:43,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:25:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:25:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:25:44,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:25:44,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29221513] [2024-11-08 16:25:44,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29221513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:25:44,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561515220] [2024-11-08 16:25:44,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:25:44,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:25:44,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:25:44,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:25:44,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:25:44,554 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 16:25:44,555 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:25:44,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 16:25:44,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:26:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:00,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:26:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:26:02,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561515220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:26:02,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:26:02,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-11-08 16:26:02,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430490359] [2024-11-08 16:26:02,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:26:02,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 16:26:02,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:26:02,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 16:26:02,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=738, Unknown=3, NotChecked=0, Total=930 [2024-11-08 16:26:06,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:26:06,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-11-08 16:26:06,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 600 transitions, 8131 flow. Second operand has 31 states, 31 states have (on average 11.193548387096774) internal successors, (347), 31 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:26:06,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:26:06,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-11-08 16:26:06,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:26:11,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:26:22,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:26:51,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:27:03,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:27:05,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:27:13,578 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 56 DAG size of output: 50 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:27:29,201 WARN L286 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 83 DAG size of output: 55 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:27:48,257 WARN L286 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 77 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:28:03,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:28:09,522 INFO L124 PetriNetUnfolderBase]: 7242/13687 cut-off events. [2024-11-08 16:28:09,522 INFO L125 PetriNetUnfolderBase]: For 104389/105035 co-relation queries the response was YES. [2024-11-08 16:28:09,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64879 conditions, 13687 events. 7242/13687 cut-off events. For 104389/105035 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 110578 event pairs, 347 based on Foata normal form. 480/14129 useless extension candidates. Maximal degree in co-relation 64686. Up to 3250 conditions per place. [2024-11-08 16:28:09,776 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 625 selfloop transitions, 534 changer transitions 101/1282 dead transitions. [2024-11-08 16:28:09,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1282 transitions, 17626 flow [2024-11-08 16:28:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-08 16:28:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-11-08 16:28:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 1153 transitions. [2024-11-08 16:28:09,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48303309593632177 [2024-11-08 16:28:09,780 INFO L175 Difference]: Start difference. First operand has 238 places, 600 transitions, 8131 flow. Second operand 77 states and 1153 transitions. [2024-11-08 16:28:09,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1282 transitions, 17626 flow [2024-11-08 16:28:10,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1282 transitions, 16775 flow, removed 392 selfloop flow, removed 19 redundant places. [2024-11-08 16:28:10,671 INFO L231 Difference]: Finished difference. Result has 314 places, 931 transitions, 14063 flow [2024-11-08 16:28:10,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=7617, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=14063, PETRI_PLACES=314, PETRI_TRANSITIONS=931} [2024-11-08 16:28:10,672 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 283 predicate places. [2024-11-08 16:28:10,672 INFO L471 AbstractCegarLoop]: Abstraction has has 314 places, 931 transitions, 14063 flow [2024-11-08 16:28:10,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.193548387096774) internal successors, (347), 31 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:10,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:28:10,673 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:28:10,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 16:28:10,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 16:28:10,874 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:28:10,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:28:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2070586024, now seen corresponding path program 4 times [2024-11-08 16:28:10,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:28:10,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066899569] [2024-11-08 16:28:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:28:10,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:28:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:28:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:28:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066899569] [2024-11-08 16:28:14,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066899569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:28:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711175038] [2024-11-08 16:28:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:28:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:28:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:28:14,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:28:14,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:28:14,546 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:28:14,546 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:28:14,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 16:28:14,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:28:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:27,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:28:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:28:35,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711175038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:28:35,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:28:35,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2024-11-08 16:28:35,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149730313] [2024-11-08 16:28:35,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:28:35,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 16:28:35,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:28:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 16:28:35,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=396, Unknown=3, NotChecked=0, Total=506 [2024-11-08 16:28:36,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-11-08 16:28:36,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 931 transitions, 14063 flow. Second operand has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:28:36,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:28:36,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-11-08 16:28:36,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:28:53,719 WARN L286 SmtUtils]: Spent 12.23s on a formula simplification. DAG size of input: 67 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:28:58,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:29:04,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:29:24,486 WARN L286 SmtUtils]: Spent 20.14s on a formula simplification. DAG size of input: 54 DAG size of output: 44 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:29:37,706 WARN L286 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 70 DAG size of output: 59 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:29:39,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:29:51,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:29:55,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:30:10,048 INFO L124 PetriNetUnfolderBase]: 8983/16810 cut-off events. [2024-11-08 16:30:10,048 INFO L125 PetriNetUnfolderBase]: For 166627/167583 co-relation queries the response was YES. [2024-11-08 16:30:10,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91034 conditions, 16810 events. 8983/16810 cut-off events. For 166627/167583 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 139101 event pairs, 417 based on Foata normal form. 750/17514 useless extension candidates. Maximal degree in co-relation 90845. Up to 4794 conditions per place. [2024-11-08 16:30:10,373 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 707 selfloop transitions, 643 changer transitions 88/1460 dead transitions. [2024-11-08 16:30:10,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1460 transitions, 23725 flow [2024-11-08 16:30:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-08 16:30:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-08 16:30:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 716 transitions. [2024-11-08 16:30:10,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4914207275223061 [2024-11-08 16:30:10,377 INFO L175 Difference]: Start difference. First operand has 314 places, 931 transitions, 14063 flow. Second operand 47 states and 716 transitions. [2024-11-08 16:30:10,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1460 transitions, 23725 flow [2024-11-08 16:30:12,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1460 transitions, 22117 flow, removed 770 selfloop flow, removed 23 redundant places. [2024-11-08 16:30:12,151 INFO L231 Difference]: Finished difference. Result has 352 places, 1183 transitions, 19264 flow [2024-11-08 16:30:12,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=13163, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=19264, PETRI_PLACES=352, PETRI_TRANSITIONS=1183} [2024-11-08 16:30:12,153 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 321 predicate places. [2024-11-08 16:30:12,153 INFO L471 AbstractCegarLoop]: Abstraction has has 352 places, 1183 transitions, 19264 flow [2024-11-08 16:30:12,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:30:12,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:30:12,153 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:30:12,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 16:30:12,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 16:30:12,354 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:30:12,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:30:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash 974246252, now seen corresponding path program 5 times [2024-11-08 16:30:12,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:30:12,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112826935] [2024-11-08 16:30:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:30:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:30:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:30:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:30:38,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:30:38,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112826935] [2024-11-08 16:30:38,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112826935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:30:38,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863913420] [2024-11-08 16:30:38,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:30:38,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:30:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:30:38,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:30:38,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:30:38,242 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 16:30:38,242 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:30:38,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 16:30:38,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:31:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:31:25,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:31:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:31:27,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863913420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:31:27,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:31:27,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 35 [2024-11-08 16:31:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375384964] [2024-11-08 16:31:27,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:31:27,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-08 16:31:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:31:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-08 16:31:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1017, Unknown=9, NotChecked=0, Total=1260 [2024-11-08 16:31:27,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-08 16:31:27,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1183 transitions, 19264 flow. Second operand has 36 states, 36 states have (on average 7.083333333333333) internal successors, (255), 36 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:31:27,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:31:27,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-08 16:31:27,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:31:49,590 WARN L286 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 37 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:31:58,559 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 49 DAG size of output: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:32:30,503 WARN L286 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 63 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:32:35,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:32:40,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:33:04,612 WARN L286 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 41 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:33:08,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:33:17,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:33:34,180 WARN L286 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 49 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:33:50,465 WARN L286 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 53 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:33:55,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:33:59,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:34:07,405 WARN L286 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 49 DAG size of output: 31 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:34:19,735 WARN L286 SmtUtils]: Spent 12.15s on a formula simplification. DAG size of input: 61 DAG size of output: 55 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:34:24,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:34:32,947 WARN L286 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 61 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:34:36,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:34:40,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:34:56,483 WARN L286 SmtUtils]: Spent 8.95s on a formula simplification. DAG size of input: 57 DAG size of output: 41 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:35:03,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:35:07,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:35:23,150 INFO L124 PetriNetUnfolderBase]: 20564/34752 cut-off events. [2024-11-08 16:35:23,151 INFO L125 PetriNetUnfolderBase]: For 425377/425377 co-relation queries the response was YES. [2024-11-08 16:35:23,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198280 conditions, 34752 events. 20564/34752 cut-off events. For 425377/425377 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 273994 event pairs, 447 based on Foata normal form. 20/34771 useless extension candidates. Maximal degree in co-relation 198103. Up to 9906 conditions per place. [2024-11-08 16:35:24,123 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 1132 selfloop transitions, 1500 changer transitions 247/2882 dead transitions. [2024-11-08 16:35:24,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 2882 transitions, 48650 flow [2024-11-08 16:35:24,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-08 16:35:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-11-08 16:35:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 1311 transitions. [2024-11-08 16:35:24,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3742506423065943 [2024-11-08 16:35:24,142 INFO L175 Difference]: Start difference. First operand has 352 places, 1183 transitions, 19264 flow. Second operand 113 states and 1311 transitions. [2024-11-08 16:35:24,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 2882 transitions, 48650 flow [2024-11-08 16:35:29,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 2882 transitions, 48165 flow, removed 182 selfloop flow, removed 17 redundant places. [2024-11-08 16:35:29,514 INFO L231 Difference]: Finished difference. Result has 511 places, 2071 transitions, 39593 flow [2024-11-08 16:35:29,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=19083, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=39593, PETRI_PLACES=511, PETRI_TRANSITIONS=2071} [2024-11-08 16:35:29,516 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 480 predicate places. [2024-11-08 16:35:29,516 INFO L471 AbstractCegarLoop]: Abstraction has has 511 places, 2071 transitions, 39593 flow [2024-11-08 16:35:29,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.083333333333333) internal successors, (255), 36 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:29,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:35:29,517 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:29,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:35:29,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-08 16:35:29,718 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:35:29,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash -592345670, now seen corresponding path program 6 times [2024-11-08 16:35:29,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:29,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379103061] [2024-11-08 16:35:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:29,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:31,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:31,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379103061] [2024-11-08 16:35:31,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379103061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:31,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825377210] [2024-11-08 16:35:31,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:35:31,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:31,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:31,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:31,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:35:31,488 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 16:35:31,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:31,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 16:35:31,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:33,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:37,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825377210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:37,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:37,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-08 16:35:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732008703] [2024-11-08 16:35:37,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:37,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 16:35:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 16:35:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:35:38,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-11-08 16:35:38,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 2071 transitions, 39593 flow. Second operand has 27 states, 27 states have (on average 13.407407407407407) internal successors, (362), 27 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) [2024-11-08 16:35:38,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:35:38,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-11-08 16:35:38,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:36:13,247 INFO L124 PetriNetUnfolderBase]: 16092/31241 cut-off events. [2024-11-08 16:36:13,248 INFO L125 PetriNetUnfolderBase]: For 716931/719246 co-relation queries the response was YES. [2024-11-08 16:36:14,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233001 conditions, 31241 events. 16092/31241 cut-off events. For 716931/719246 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 295570 event pairs, 769 based on Foata normal form. 919/31574 useless extension candidates. Maximal degree in co-relation 232634. Up to 9123 conditions per place. [2024-11-08 16:36:14,332 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 1359 selfloop transitions, 1300 changer transitions 48/2823 dead transitions. [2024-11-08 16:36:14,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 2823 transitions, 58388 flow [2024-11-08 16:36:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-08 16:36:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-11-08 16:36:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1043 transitions. [2024-11-08 16:36:14,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5515600211528292 [2024-11-08 16:36:14,336 INFO L175 Difference]: Start difference. First operand has 511 places, 2071 transitions, 39593 flow. Second operand 61 states and 1043 transitions. [2024-11-08 16:36:14,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 2823 transitions, 58388 flow [2024-11-08 16:36:26,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 2823 transitions, 56712 flow, removed 770 selfloop flow, removed 25 redundant places. [2024-11-08 16:36:26,789 INFO L231 Difference]: Finished difference. Result has 546 places, 2491 transitions, 52072 flow [2024-11-08 16:36:26,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=38336, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=930, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=52072, PETRI_PLACES=546, PETRI_TRANSITIONS=2491} [2024-11-08 16:36:26,791 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 515 predicate places. [2024-11-08 16:36:26,791 INFO L471 AbstractCegarLoop]: Abstraction has has 546 places, 2491 transitions, 52072 flow [2024-11-08 16:36:26,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.407407407407407) internal successors, (362), 27 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) [2024-11-08 16:36:26,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:36:26,791 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:26,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 16:36:26,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:26,992 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 16:36:26,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash 728676822, now seen corresponding path program 7 times [2024-11-08 16:36:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:26,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598249275] [2024-11-08 16:36:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:28,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598249275] [2024-11-08 16:36:28,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598249275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841213136] [2024-11-08 16:36:28,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:36:28,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:28,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:28,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f5c811-37b6-4aac-bcb2-9042326feb84/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:36:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:28,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 16:36:28,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:38,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841213136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:41,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:41,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2024-11-08 16:36:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858978326] [2024-11-08 16:36:41,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:41,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 16:36:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 16:36:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=816, Unknown=2, NotChecked=0, Total=992 [2024-11-08 16:36:43,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:36:47,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:36:51,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:36:53,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:36:57,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:37:00,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:37:01,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-08 16:37:01,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 2491 transitions, 52072 flow. Second operand has 32 states, 32 states have (on average 7.6875) internal successors, (246), 32 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:01,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:37:01,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-08 16:37:01,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:37:13,457 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 51 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:37:22,741 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 63 DAG size of output: 44 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:37:29,542 WARN L286 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 84 DAG size of output: 52 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 16:37:46,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-08 16:37:58,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []