./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1 --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 6fdb5189ea0a06d32886b44c2108d225ef2901fa5113fdc3856a252d0f653190 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:05:15,157 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:05:15,229 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 07:05:15,233 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:05:15,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:05:15,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:05:15,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:05:15,261 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:05:15,262 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:05:15,262 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:05:15,262 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:05:15,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:05:15,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:05:15,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:05:15,263 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:05:15,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:05:15,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 07:05:15,264 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:05:15,265 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 07:05:15,265 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:05:15,265 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:05:15,265 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:05:15,265 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:05:15,265 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:05:15,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:05:15,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:05:15,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:05:15,266 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:05:15,266 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:05:15,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:05:15,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:05:15,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:05:15,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:05:15,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:05:15,268 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1 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 -> 6fdb5189ea0a06d32886b44c2108d225ef2901fa5113fdc3856a252d0f653190 [2024-12-02 07:05:15,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:05:15,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:05:15,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:05:15,560 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:05:15,561 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:05:15,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2024-12-02 07:05:18,641 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/data/460d5aff2/10a6f83beb8a43c9bbf439c2291c3e18/FLAG39b8451d7 [2024-12-02 07:05:18,856 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:05:18,856 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2024-12-02 07:05:18,867 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/data/460d5aff2/10a6f83beb8a43c9bbf439c2291c3e18/FLAG39b8451d7 [2024-12-02 07:05:18,885 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/data/460d5aff2/10a6f83beb8a43c9bbf439c2291c3e18 [2024-12-02 07:05:18,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:05:18,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:05:18,891 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:05:18,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:05:18,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:05:18,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:05:18" (1/1) ... [2024-12-02 07:05:18,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34590ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:18, skipping insertion in model container [2024-12-02 07:05:18,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:05:18" (1/1) ... [2024-12-02 07:05:18,916 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:05:19,113 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_4c249128-6a76-4b49-a8e2-ca592cbe8344/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3221,3234] [2024-12-02 07:05:19,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:05:19,135 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:05:19,168 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_4c249128-6a76-4b49-a8e2-ca592cbe8344/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3221,3234] [2024-12-02 07:05:19,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:05:19,192 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:05:19,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19 WrapperNode [2024-12-02 07:05:19,193 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:05:19,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:05:19,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:05:19,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:05:19,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,245 INFO L138 Inliner]: procedures = 27, calls = 59, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 353 [2024-12-02 07:05:19,245 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:05:19,246 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:05:19,246 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:05:19,246 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:05:19,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,262 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,284 INFO L175 MemorySlicer]: Split 30 memory accesses to 3 slices as follows [2, 4, 24]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 1, 3]. [2024-12-02 07:05:19,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,298 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,310 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:05:19,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:05:19,315 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:05:19,315 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:05:19,316 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (1/1) ... [2024-12-02 07:05:19,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:05:19,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:05:19,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:05:19,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:05:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:05:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 07:05:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 07:05:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 07:05:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 07:05:19,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 07:05:19,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 07:05:19,381 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 07:05:19,381 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 07:05:19,381 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 07:05:19,381 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 07:05:19,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:05:19,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:05:19,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 07:05:19,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 07:05:19,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 07:05:19,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:05:19,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:05:19,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:05:19,384 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 07:05:19,506 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:05:19,508 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:05:20,072 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 07:05:20,072 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:05:20,464 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:05:20,465 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-12-02 07:05:20,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:05:20 BoogieIcfgContainer [2024-12-02 07:05:20,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:05:20,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:05:20,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:05:20,471 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:05:20,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:05:18" (1/3) ... [2024-12-02 07:05:20,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc91a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:05:20, skipping insertion in model container [2024-12-02 07:05:20,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:05:19" (2/3) ... [2024-12-02 07:05:20,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc91a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:05:20, skipping insertion in model container [2024-12-02 07:05:20,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:05:20" (3/3) ... [2024-12-02 07:05:20,473 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2024-12-02 07:05:20,500 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:05:20,501 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-dot-product-alt.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2024-12-02 07:05:20,501 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 07:05:20,575 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 07:05:20,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 99 flow [2024-12-02 07:05:20,630 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-12-02 07:05:20,632 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 07:05:20,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 7/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-12-02 07:05:20,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 99 flow [2024-12-02 07:05:20,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 88 flow [2024-12-02 07:05:20,646 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:05:20,657 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;@7a06cbe8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:05:20,657 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 07:05:20,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 07:05:20,670 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2024-12-02 07:05:20,670 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 07:05:20,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:05:20,671 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:05:20,672 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:05:20,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:05:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash 283930529, now seen corresponding path program 1 times [2024-12-02 07:05:20,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:05:20,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540125037] [2024-12-02 07:05:20,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:20,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:05:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:05:20,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:05:20,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540125037] [2024-12-02 07:05:21,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540125037] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:05:21,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:05:21,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:05:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607789354] [2024-12-02 07:05:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:05:21,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:05:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:05:21,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:05:21,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:05:21,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 39 [2024-12-02 07:05:21,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:21,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:05:21,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 39 [2024-12-02 07:05:21,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:05:21,467 INFO L124 PetriNetUnfolderBase]: 1212/1743 cut-off events. [2024-12-02 07:05:21,467 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2024-12-02 07:05:21,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3640 conditions, 1743 events. 1212/1743 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6898 event pairs, 308 based on Foata normal form. 1/1434 useless extension candidates. Maximal degree in co-relation 3272. Up to 1239 conditions per place. [2024-12-02 07:05:21,482 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 49 selfloop transitions, 4 changer transitions 1/55 dead transitions. [2024-12-02 07:05:21,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 251 flow [2024-12-02 07:05:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:05:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 07:05:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-12-02 07:05:21,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-12-02 07:05:21,497 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 88 flow. Second operand 3 states and 67 transitions. [2024-12-02 07:05:21,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 251 flow [2024-12-02 07:05:21,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 55 transitions, 229 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 07:05:21,508 INFO L231 Difference]: Finished difference. Result has 35 places, 38 transitions, 102 flow [2024-12-02 07:05:21,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=35, PETRI_TRANSITIONS=38} [2024-12-02 07:05:21,513 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-12-02 07:05:21,514 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 38 transitions, 102 flow [2024-12-02 07:05:21,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:21,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:05:21,514 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:05:21,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:05:21,515 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:05:21,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:05:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -454551309, now seen corresponding path program 1 times [2024-12-02 07:05:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:05:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706168026] [2024-12-02 07:05:21,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:05:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:05:21,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:05:21,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706168026] [2024-12-02 07:05:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706168026] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:05:21,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:05:21,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:05:21,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618883569] [2024-12-02 07:05:21,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:05:21,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:05:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:05:21,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:05:21,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:05:21,796 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 39 [2024-12-02 07:05:21,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 38 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:21,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:05:21,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 39 [2024-12-02 07:05:21,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:05:22,211 INFO L124 PetriNetUnfolderBase]: 1218/1756 cut-off events. [2024-12-02 07:05:22,211 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-12-02 07:05:22,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 1756 events. 1218/1756 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6787 event pairs, 885 based on Foata normal form. 0/1440 useless extension candidates. Maximal degree in co-relation 1068. Up to 1743 conditions per place. [2024-12-02 07:05:22,219 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 35 selfloop transitions, 4 changer transitions 11/51 dead transitions. [2024-12-02 07:05:22,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 228 flow [2024-12-02 07:05:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:05:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:05:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-12-02 07:05:22,221 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3487179487179487 [2024-12-02 07:05:22,221 INFO L175 Difference]: Start difference. First operand has 35 places, 38 transitions, 102 flow. Second operand 5 states and 68 transitions. [2024-12-02 07:05:22,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 228 flow [2024-12-02 07:05:22,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 07:05:22,224 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 132 flow [2024-12-02 07:05:22,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2024-12-02 07:05:22,225 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-12-02 07:05:22,225 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 132 flow [2024-12-02 07:05:22,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:22,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:05:22,225 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:05:22,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:05:22,225 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:05:22,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:05:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash 23369899, now seen corresponding path program 1 times [2024-12-02 07:05:22,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:05:22,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226556876] [2024-12-02 07:05:22,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:22,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:05:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:05:22,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:05:22,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226556876] [2024-12-02 07:05:22,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226556876] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:05:22,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:05:22,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:05:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619216569] [2024-12-02 07:05:22,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:05:22,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:05:22,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:05:22,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:05:22,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:05:22,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 39 [2024-12-02 07:05:22,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:22,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:05:22,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 39 [2024-12-02 07:05:22,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:05:22,704 INFO L124 PetriNetUnfolderBase]: 1254/1803 cut-off events. [2024-12-02 07:05:22,704 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2024-12-02 07:05:22,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3988 conditions, 1803 events. 1254/1803 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6912 event pairs, 426 based on Foata normal form. 0/1527 useless extension candidates. Maximal degree in co-relation 3963. Up to 912 conditions per place. [2024-12-02 07:05:22,711 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 51 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2024-12-02 07:05:22,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 284 flow [2024-12-02 07:05:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:05:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:05:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-12-02 07:05:22,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-12-02 07:05:22,713 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 132 flow. Second operand 4 states and 65 transitions. [2024-12-02 07:05:22,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 284 flow [2024-12-02 07:05:22,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 266 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-12-02 07:05:22,715 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 135 flow [2024-12-02 07:05:22,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-12-02 07:05:22,716 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-12-02 07:05:22,716 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 135 flow [2024-12-02 07:05:22,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:22,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:05:22,717 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:05:22,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:05:22,717 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:05:22,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:05:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1579132063, now seen corresponding path program 1 times [2024-12-02 07:05:22,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:05:22,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796070662] [2024-12-02 07:05:22,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:05:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:05:22,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:05:22,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796070662] [2024-12-02 07:05:22,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796070662] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:05:22,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816041179] [2024-12-02 07:05:22,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:22,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:05:22,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:05:22,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:05:22,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:05:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:23,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 07:05:23,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:05:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:05:23,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:05:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:05:23,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816041179] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 07:05:23,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:05:23,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-12-02 07:05:23,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746225257] [2024-12-02 07:05:23,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:05:23,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:05:23,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:05:23,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:05:23,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:05:23,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 39 [2024-12-02 07:05:23,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:23,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:05:23,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 39 [2024-12-02 07:05:23,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:05:23,656 INFO L124 PetriNetUnfolderBase]: 1305/1869 cut-off events. [2024-12-02 07:05:23,656 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2024-12-02 07:05:23,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 1869 events. 1305/1869 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7431 event pairs, 377 based on Foata normal form. 0/1680 useless extension candidates. Maximal degree in co-relation 4670. Up to 1030 conditions per place. [2024-12-02 07:05:23,667 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 54 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-12-02 07:05:23,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 317 flow [2024-12-02 07:05:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:05:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:05:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-12-02 07:05:23,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2024-12-02 07:05:23,669 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 135 flow. Second operand 5 states and 72 transitions. [2024-12-02 07:05:23,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 317 flow [2024-12-02 07:05:23,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 60 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:05:23,672 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 154 flow [2024-12-02 07:05:23,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-12-02 07:05:23,673 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2024-12-02 07:05:23,673 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 154 flow [2024-12-02 07:05:23,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:23,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:05:23,674 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:05:23,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:05:23,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:05:23,875 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:05:23,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:05:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1490588897, now seen corresponding path program 1 times [2024-12-02 07:05:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:05:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421483293] [2024-12-02 07:05:23,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:05:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:05:24,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:05:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421483293] [2024-12-02 07:05:24,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421483293] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:05:24,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:05:24,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:05:24,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094289957] [2024-12-02 07:05:24,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:05:24,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:05:24,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:05:24,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:05:24,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:05:24,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 39 [2024-12-02 07:05:24,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:24,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:05:24,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 39 [2024-12-02 07:05:24,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:05:24,864 INFO L124 PetriNetUnfolderBase]: 1351/1958 cut-off events. [2024-12-02 07:05:24,864 INFO L125 PetriNetUnfolderBase]: For 1421/1421 co-relation queries the response was YES. [2024-12-02 07:05:24,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5445 conditions, 1958 events. 1351/1958 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7273 event pairs, 1004 based on Foata normal form. 32/1872 useless extension candidates. Maximal degree in co-relation 5412. Up to 1863 conditions per place. [2024-12-02 07:05:24,875 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 41 selfloop transitions, 3 changer transitions 11/56 dead transitions. [2024-12-02 07:05:24,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 56 transitions, 304 flow [2024-12-02 07:05:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:05:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 07:05:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-12-02 07:05:24,876 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2024-12-02 07:05:24,876 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 154 flow. Second operand 4 states and 67 transitions. [2024-12-02 07:05:24,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 56 transitions, 304 flow [2024-12-02 07:05:24,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 297 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-12-02 07:05:24,881 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 170 flow [2024-12-02 07:05:24,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-12-02 07:05:24,881 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-12-02 07:05:24,882 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 170 flow [2024-12-02 07:05:24,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:24,882 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:05:24,882 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:05:24,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 07:05:24,882 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:05:24,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:05:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash -297430134, now seen corresponding path program 1 times [2024-12-02 07:05:24,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:05:24,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598871573] [2024-12-02 07:05:24,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:24,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:05:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:05:25,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:05:25,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598871573] [2024-12-02 07:05:25,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598871573] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:05:25,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:05:25,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:05:25,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185036021] [2024-12-02 07:05:25,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:05:25,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:05:25,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:05:25,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:05:25,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:05:25,289 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 39 [2024-12-02 07:05:25,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:25,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 07:05:25,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 39 [2024-12-02 07:05:25,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 07:05:25,715 INFO L124 PetriNetUnfolderBase]: 1355/1967 cut-off events. [2024-12-02 07:05:25,716 INFO L125 PetriNetUnfolderBase]: For 1640/1640 co-relation queries the response was YES. [2024-12-02 07:05:25,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5585 conditions, 1967 events. 1355/1967 cut-off events. For 1640/1640 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7337 event pairs, 1004 based on Foata normal form. 44/2010 useless extension candidates. Maximal degree in co-relation 5548. Up to 1866 conditions per place. [2024-12-02 07:05:25,728 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 36 selfloop transitions, 7 changer transitions 18/62 dead transitions. [2024-12-02 07:05:25,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 352 flow [2024-12-02 07:05:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:05:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 07:05:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-12-02 07:05:25,729 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2024-12-02 07:05:25,729 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 170 flow. Second operand 5 states and 77 transitions. [2024-12-02 07:05:25,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 352 flow [2024-12-02 07:05:25,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 07:05:25,733 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 208 flow [2024-12-02 07:05:25,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-12-02 07:05:25,734 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-12-02 07:05:25,734 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 208 flow [2024-12-02 07:05:25,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:05:25,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 07:05:25,734 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:05:25,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 07:05:25,735 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 07:05:25,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:05:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash 17340522, now seen corresponding path program 1 times [2024-12-02 07:05:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:05:25,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853276162] [2024-12-02 07:05:25,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:05:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:05:28,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:05:28,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853276162] [2024-12-02 07:05:28,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853276162] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:05:28,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137042703] [2024-12-02 07:05:28,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:05:28,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:05:28,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:05:28,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:05:28,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c249128-6a76-4b49-a8e2-ca592cbe8344/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:05:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:05:28,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 07:05:28,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:05:28,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-12-02 07:05:28,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:05:28,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:05:29,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-12-02 07:05:29,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-12-02 07:05:29,559 INFO L349 Elim1Store]: treesize reduction 80, result has 44.8 percent of original size [2024-12-02 07:05:29,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 83 [2024-12-02 07:05:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:05:29,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:05:38,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-12-02 07:05:38,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:05:38,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 474 treesize of output 442 [2024-12-02 07:05:38,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 418 treesize of output 402 [2024-12-02 07:05:38,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:05:38,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1238 treesize of output 1038 [2024-12-02 07:05:47,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:05:47,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1175 treesize of output 1151 [2024-12-02 07:05:47,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:05:47,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 19 [2024-12-02 07:05:55,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2024-12-02 07:05:55,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:05:55,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 107