./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:24:39,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:24:39,137 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:24:39,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:24:39,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:24:39,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:24:39,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:24:39,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:24:39,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:24:39,187 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:24:39,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:24:39,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:24:39,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:24:39,189 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:24:39,189 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:24:39,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:24:39,189 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:24:39,189 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:24:39,189 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:24:39,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:24:39,190 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:24:39,190 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:24:39,190 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:24:39,190 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:24:39,191 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:24:39,191 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:24:39,191 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:24:39,191 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:24:39,191 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:24:39,191 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:24:39,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:24:39,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:24:39,192 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:24:39,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:24:39,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:24:39,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:24:39,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:24:39,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:24:39,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:24:39,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:24:39,193 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:24:39,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:24:39,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:24:39,194 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:24:39,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:24:39,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:24:39,194 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:24:39,194 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_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2024-11-27 20:24:39,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:24:39,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:24:39,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:24:39,554 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:24:39,554 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:24:39,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2024-11-27 20:24:42,557 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/data/452b13737/c20238d4d2054373b1938ca24e127877/FLAGf3bafeb54 [2024-11-27 20:24:42,820 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:24:42,820 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2024-11-27 20:24:42,828 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/data/452b13737/c20238d4d2054373b1938ca24e127877/FLAGf3bafeb54 [2024-11-27 20:24:42,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/data/452b13737/c20238d4d2054373b1938ca24e127877 [2024-11-27 20:24:42,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:24:42,854 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:24:42,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:24:42,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:24:42,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:24:42,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:24:42" (1/1) ... [2024-11-27 20:24:42,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97c373c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:42, skipping insertion in model container [2024-11-27 20:24:42,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:24:42" (1/1) ... [2024-11-27 20:24:42,887 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:24:43,080 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 20:24:43,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:24:43,095 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:24:43,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:24:43,144 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:24:43,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43 WrapperNode [2024-11-27 20:24:43,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:24:43,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:24:43,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:24:43,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:24:43,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,180 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2024-11-27 20:24:43,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:24:43,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:24:43,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:24:43,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:24:43,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,196 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,222 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 20:24:43,222 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,240 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,241 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,248 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,257 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,260 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:24:43,261 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:24:43,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:24:43,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:24:43,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (1/1) ... [2024-11-27 20:24:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:24:43,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:43,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:24:43,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:24:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:24:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:24:43,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:24:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:24:43,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:24:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 20:24:43,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 20:24:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:24:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:24:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:24:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:24:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 20:24:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 20:24:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:24:43,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:24:43,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:24:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:24:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:24:43,345 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:24:43,440 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:24:43,442 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:24:43,857 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:24:43,857 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:24:44,145 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:24:44,146 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:24:44,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:24:44 BoogieIcfgContainer [2024-11-27 20:24:44,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:24:44,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:24:44,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:24:44,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:24:44,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:24:42" (1/3) ... [2024-11-27 20:24:44,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287a6f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:24:44, skipping insertion in model container [2024-11-27 20:24:44,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:24:43" (2/3) ... [2024-11-27 20:24:44,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287a6f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:24:44, skipping insertion in model container [2024-11-27 20:24:44,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:24:44" (3/3) ... [2024-11-27 20:24:44,158 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2024-11-27 20:24:44,173 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:24:44,174 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-min-array.wvr.c that has 4 procedures, 47 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2024-11-27 20:24:44,175 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:24:44,257 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 20:24:44,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-27 20:24:44,342 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-27 20:24:44,346 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:24:44,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-27 20:24:44,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-27 20:24:44,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-27 20:24:44,362 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:24:44,374 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=None, 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;@9ce7367, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:24:44,375 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-27 20:24:44,380 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:24:44,380 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 20:24:44,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:24:44,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:44,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:24:44,381 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:44,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 491139, now seen corresponding path program 1 times [2024-11-27 20:24:44,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:44,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456156798] [2024-11-27 20:24:44,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:44,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:24:44,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:44,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456156798] [2024-11-27 20:24:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456156798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:24:44,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:24:44,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:24:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321326126] [2024-11-27 20:24:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:24:44,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:24:44,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:44,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:24:44,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:24:44,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:44,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-27 20:24:44,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:44,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:44,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:45,334 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-27 20:24:45,335 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-27 20:24:45,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9884 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-27 20:24:45,367 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-27 20:24:45,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-27 20:24:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:24:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:24:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-27 20:24:45,385 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-27 20:24:45,388 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-27 20:24:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-27 20:24:45,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 20:24:45,403 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-27 20:24:45,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-27 20:24:45,411 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-27 20:24:45,411 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-27 20:24:45,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-27 20:24:45,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:45,411 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:24:45,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:24:45,412 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:45,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash 491140, now seen corresponding path program 1 times [2024-11-27 20:24:45,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:45,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607446336] [2024-11-27 20:24:45,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:45,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:24:45,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:45,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607446336] [2024-11-27 20:24:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607446336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:24:45,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:24:45,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:24:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728835904] [2024-11-27 20:24:45,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:24:45,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:24:45,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:45,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:24:45,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:24:45,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:45,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 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) [2024-11-27 20:24:45,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:45,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:45,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:46,331 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-27 20:24:46,331 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-27 20:24:46,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9820 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-27 20:24:46,344 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-27 20:24:46,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-27 20:24:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:24:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:24:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-27 20:24:46,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-27 20:24:46,346 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-27 20:24:46,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-27 20:24:46,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:24:46,349 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-27 20:24:46,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-27 20:24:46,351 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-27 20:24:46,352 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-27 20:24:46,352 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) [2024-11-27 20:24:46,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:46,352 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 20:24:46,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:24:46,352 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:46,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash 472000985, now seen corresponding path program 1 times [2024-11-27 20:24:46,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:46,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639036440] [2024-11-27 20:24:46,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:46,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:24:46,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639036440] [2024-11-27 20:24:46,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639036440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954686474] [2024-11-27 20:24:46,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:46,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:46,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:46,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:24:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:46,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:24:46,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:46,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-27 20:24:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:24:47,276 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:24:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:24:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954686474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:24:47,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:24:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-27 20:24:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6599129] [2024-11-27 20:24:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:24:47,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:24:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:47,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:24:47,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:24:47,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:47,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2024-11-27 20:24:47,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:47,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:47,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:48,082 INFO L124 PetriNetUnfolderBase]: 1318/1935 cut-off events. [2024-11-27 20:24:48,082 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-27 20:24:48,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 1935 events. 1318/1935 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9870 event pairs, 1060 based on Foata normal form. 0/1380 useless extension candidates. Maximal degree in co-relation 3850. Up to 1879 conditions per place. [2024-11-27 20:24:48,096 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2024-11-27 20:24:48,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 191 flow [2024-11-27 20:24:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:24:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:24:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-11-27 20:24:48,098 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28 [2024-11-27 20:24:48,098 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 8 states and 112 transitions. [2024-11-27 20:24:48,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 191 flow [2024-11-27 20:24:48,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:24:48,100 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2024-11-27 20:24:48,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-27 20:24:48,101 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-27 20:24:48,101 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2024-11-27 20:24:48,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2024-11-27 20:24:48,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:48,102 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:24:48,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:24:48,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:48,307 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:48,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1749920922, now seen corresponding path program 1 times [2024-11-27 20:24:48,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:48,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124978432] [2024-11-27 20:24:48,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:48,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:24:48,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124978432] [2024-11-27 20:24:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124978432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:24:48,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:24:48,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:24:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467728651] [2024-11-27 20:24:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:24:48,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:24:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:48,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:24:48,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:24:48,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:48,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 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) [2024-11-27 20:24:48,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:48,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:48,655 INFO L124 PetriNetUnfolderBase]: 794/1180 cut-off events. [2024-11-27 20:24:48,655 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-27 20:24:48,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2380 conditions, 1180 events. 794/1180 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5320 event pairs, 608 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 2342. Up to 1136 conditions per place. [2024-11-27 20:24:48,663 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-11-27 20:24:48,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 196 flow [2024-11-27 20:24:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:24:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:24:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-27 20:24:48,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-27 20:24:48,665 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 4 states and 68 transitions. [2024-11-27 20:24:48,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 196 flow [2024-11-27 20:24:48,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-27 20:24:48,670 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 92 flow [2024-11-27 20:24:48,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-27 20:24:48,671 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-27 20:24:48,672 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 92 flow [2024-11-27 20:24:48,672 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) [2024-11-27 20:24:48,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:48,672 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:24:48,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:24:48,673 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:48,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1749920923, now seen corresponding path program 1 times [2024-11-27 20:24:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892199140] [2024-11-27 20:24:48,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:48,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:24:48,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:48,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892199140] [2024-11-27 20:24:48,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892199140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:24:48,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:24:48,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:24:48,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355911563] [2024-11-27 20:24:48,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:24:48,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:24:48,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:48,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:24:48,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:24:48,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-27 20:24:48,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:24:48,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:48,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-27 20:24:48,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:48,990 INFO L124 PetriNetUnfolderBase]: 793/1179 cut-off events. [2024-11-27 20:24:48,990 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-27 20:24:48,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1179 events. 793/1179 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5328 event pairs, 608 based on Foata normal form. 1/966 useless extension candidates. Maximal degree in co-relation 2334. Up to 1141 conditions per place. [2024-11-27 20:24:49,005 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-27 20:24:49,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 156 flow [2024-11-27 20:24:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:24:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:24:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-27 20:24:49,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-11-27 20:24:49,010 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 92 flow. Second operand 3 states and 62 transitions. [2024-11-27 20:24:49,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 156 flow [2024-11-27 20:24:49,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:24:49,011 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 88 flow [2024-11-27 20:24:49,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-27 20:24:49,013 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-27 20:24:49,015 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 88 flow [2024-11-27 20:24:49,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:24:49,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:49,016 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:24:49,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:24:49,016 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:49,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -338311898, now seen corresponding path program 1 times [2024-11-27 20:24:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:49,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792522048] [2024-11-27 20:24:49,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:49,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:49,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792522048] [2024-11-27 20:24:49,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792522048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:49,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269135745] [2024-11-27 20:24:49,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:49,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:49,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:49,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:49,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:24:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:49,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:24:49,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:49,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 20:24:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:49,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:24:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:49,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269135745] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:49,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:24:49,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2024-11-27 20:24:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962896663] [2024-11-27 20:24:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:24:49,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:24:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:49,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:24:49,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:24:49,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-27 20:24:49,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 88 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-11-27 20:24:49,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:49,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-27 20:24:49,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:49,952 INFO L124 PetriNetUnfolderBase]: 1002/1505 cut-off events. [2024-11-27 20:24:49,953 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-27 20:24:49,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 1505 events. 1002/1505 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7199 event pairs, 483 based on Foata normal form. 0/1273 useless extension candidates. Maximal degree in co-relation 2951. Up to 926 conditions per place. [2024-11-27 20:24:49,962 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 43 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2024-11-27 20:24:49,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 226 flow [2024-11-27 20:24:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:24:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:24:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-11-27 20:24:49,967 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2024-11-27 20:24:49,967 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 88 flow. Second operand 6 states and 109 transitions. [2024-11-27 20:24:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 226 flow [2024-11-27 20:24:49,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:24:49,969 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 120 flow [2024-11-27 20:24:49,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-27 20:24:49,970 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-27 20:24:49,970 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 120 flow [2024-11-27 20:24:49,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2024-11-27 20:24:49,971 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:49,971 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:24:49,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:24:50,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 20:24:50,172 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:50,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1273018705, now seen corresponding path program 1 times [2024-11-27 20:24:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:50,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098731609] [2024-11-27 20:24:50,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:50,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:50,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098731609] [2024-11-27 20:24:50,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098731609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:50,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356647214] [2024-11-27 20:24:50,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:50,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:50,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:50,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:24:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:50,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:24:50,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:50,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:24:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:50,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356647214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:24:50,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:24:50,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-27 20:24:50,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964363760] [2024-11-27 20:24:50,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:24:50,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:24:50,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:50,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:24:50,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:24:50,635 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:50,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 120 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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) [2024-11-27 20:24:50,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:50,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:50,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:51,133 INFO L124 PetriNetUnfolderBase]: 1728/2519 cut-off events. [2024-11-27 20:24:51,134 INFO L125 PetriNetUnfolderBase]: For 1674/1674 co-relation queries the response was YES. [2024-11-27 20:24:51,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6297 conditions, 2519 events. 1728/2519 cut-off events. For 1674/1674 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11911 event pairs, 1148 based on Foata normal form. 0/2233 useless extension candidates. Maximal degree in co-relation 4243. Up to 1681 conditions per place. [2024-11-27 20:24:51,148 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-11-27 20:24:51,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 80 transitions, 406 flow [2024-11-27 20:24:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:24:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:24:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-27 20:24:51,150 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-27 20:24:51,150 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 120 flow. Second operand 7 states and 135 transitions. [2024-11-27 20:24:51,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 80 transitions, 406 flow [2024-11-27 20:24:51,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:24:51,154 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 145 flow [2024-11-27 20:24:51,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=145, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-27 20:24:51,155 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-11-27 20:24:51,155 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 145 flow [2024-11-27 20:24:51,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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) [2024-11-27 20:24:51,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:51,156 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:24:51,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:24:51,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:51,360 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:51,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1639058172, now seen corresponding path program 1 times [2024-11-27 20:24:51,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:51,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828066204] [2024-11-27 20:24:51,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:51,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828066204] [2024-11-27 20:24:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828066204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324789541] [2024-11-27 20:24:51,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:51,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:51,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:51,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:51,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:24:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:51,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:24:51,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:51,678 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:24:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324789541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:24:51,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:24:51,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 20:24:51,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370350592] [2024-11-27 20:24:51,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:24:51,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:24:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:51,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:24:51,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:24:51,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:51,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 145 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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) [2024-11-27 20:24:51,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:51,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:51,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:52,405 INFO L124 PetriNetUnfolderBase]: 1788/2627 cut-off events. [2024-11-27 20:24:52,406 INFO L125 PetriNetUnfolderBase]: For 1629/1713 co-relation queries the response was YES. [2024-11-27 20:24:52,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 2627 events. 1788/2627 cut-off events. For 1629/1713 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12755 event pairs, 1114 based on Foata normal form. 38/2425 useless extension candidates. Maximal degree in co-relation 4637. Up to 1826 conditions per place. [2024-11-27 20:24:52,422 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-27 20:24:52,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 445 flow [2024-11-27 20:24:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:24:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:24:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-27 20:24:52,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-27 20:24:52,424 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 145 flow. Second operand 8 states and 155 transitions. [2024-11-27 20:24:52,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 445 flow [2024-11-27 20:24:52,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 434 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:24:52,431 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 195 flow [2024-11-27 20:24:52,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=195, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-11-27 20:24:52,432 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-11-27 20:24:52,432 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 195 flow [2024-11-27 20:24:52,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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) [2024-11-27 20:24:52,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:52,432 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:24:52,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:24:52,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:52,633 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:52,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash 625185884, now seen corresponding path program 2 times [2024-11-27 20:24:52,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:52,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464005453] [2024-11-27 20:24:52,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:24:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:52,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:24:52,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:24:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:24:52,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:52,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464005453] [2024-11-27 20:24:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464005453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:52,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056467179] [2024-11-27 20:24:52,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:24:52,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:52,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:52,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:24:52,922 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:24:52,922 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:24:52,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:24:52,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:24:53,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:24:53,157 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 22 treesize of output 18 [2024-11-27 20:24:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:24:53,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056467179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:24:53,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:24:53,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-27 20:24:53,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734001542] [2024-11-27 20:24:53,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:24:53,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:24:53,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:53,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:24:53,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:24:53,373 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:53,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 195 flow. Second operand has 16 states, 16 states have (on average 11.125) internal successors, (178), 16 states have internal predecessors, (178), 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) [2024-11-27 20:24:53,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:53,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:53,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:54,533 INFO L124 PetriNetUnfolderBase]: 2082/2969 cut-off events. [2024-11-27 20:24:54,533 INFO L125 PetriNetUnfolderBase]: For 4259/4351 co-relation queries the response was YES. [2024-11-27 20:24:54,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8734 conditions, 2969 events. 2082/2969 cut-off events. For 4259/4351 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13832 event pairs, 468 based on Foata normal form. 0/2665 useless extension candidates. Maximal degree in co-relation 6541. Up to 819 conditions per place. [2024-11-27 20:24:54,551 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 111 selfloop transitions, 13 changer transitions 0/127 dead transitions. [2024-11-27 20:24:54,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 127 transitions, 747 flow [2024-11-27 20:24:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:24:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 20:24:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-11-27 20:24:54,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-11-27 20:24:54,553 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 195 flow. Second operand 11 states and 215 transitions. [2024-11-27 20:24:54,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 127 transitions, 747 flow [2024-11-27 20:24:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 127 transitions, 732 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-27 20:24:54,560 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 222 flow [2024-11-27 20:24:54,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=222, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-11-27 20:24:54,562 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-27 20:24:54,562 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 222 flow [2024-11-27 20:24:54,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.125) internal successors, (178), 16 states have internal predecessors, (178), 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) [2024-11-27 20:24:54,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:54,562 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:24:54,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:24:54,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:54,763 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:54,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:54,764 INFO L85 PathProgramCache]: Analyzing trace with hash -727393789, now seen corresponding path program 1 times [2024-11-27 20:24:54,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:54,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568000816] [2024-11-27 20:24:54,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:55,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568000816] [2024-11-27 20:24:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568000816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185555397] [2024-11-27 20:24:55,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:55,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:55,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:55,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:24:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:55,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:24:55,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:55,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 20:24:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:55,291 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:24:55,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185555397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:24:55,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:24:55,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-27 20:24:55,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996195729] [2024-11-27 20:24:55,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:24:55,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:24:55,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:55,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:24:55,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:24:55,334 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-27 20:24:55,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2024-11-27 20:24:55,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:55,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-27 20:24:55,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:55,825 INFO L124 PetriNetUnfolderBase]: 2381/3622 cut-off events. [2024-11-27 20:24:55,825 INFO L125 PetriNetUnfolderBase]: For 6060/6168 co-relation queries the response was YES. [2024-11-27 20:24:55,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11067 conditions, 3622 events. 2381/3622 cut-off events. For 6060/6168 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18664 event pairs, 1236 based on Foata normal form. 0/3485 useless extension candidates. Maximal degree in co-relation 7938. Up to 2497 conditions per place. [2024-11-27 20:24:55,848 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 62 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-11-27 20:24:55,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 499 flow [2024-11-27 20:24:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:24:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:24:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-11-27 20:24:55,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.376 [2024-11-27 20:24:55,851 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 222 flow. Second operand 5 states and 94 transitions. [2024-11-27 20:24:55,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 499 flow [2024-11-27 20:24:55,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 467 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-27 20:24:55,860 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 225 flow [2024-11-27 20:24:55,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-11-27 20:24:55,863 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-27 20:24:55,863 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 225 flow [2024-11-27 20:24:55,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2024-11-27 20:24:55,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:55,863 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:24:55,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 20:24:56,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 20:24:56,069 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:56,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1263890095, now seen corresponding path program 2 times [2024-11-27 20:24:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143871050] [2024-11-27 20:24:56,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:24:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:56,091 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:24:56,091 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:24:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:24:56,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:56,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143871050] [2024-11-27 20:24:56,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143871050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:56,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056047397] [2024-11-27 20:24:56,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:24:56,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:56,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:56,426 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:56,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:24:56,505 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:24:56,505 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:24:56,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 20:24:56,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:24:56,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:24:56,834 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 24 treesize of output 20 [2024-11-27 20:24:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:24:56,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056047397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:24:56,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:24:56,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-27 20:24:56,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113874392] [2024-11-27 20:24:56,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:24:56,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:24:56,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:56,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:24:56,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:24:57,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:57,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 225 flow. Second operand has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 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) [2024-11-27 20:24:57,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:57,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:57,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:24:58,992 INFO L124 PetriNetUnfolderBase]: 3908/5460 cut-off events. [2024-11-27 20:24:58,992 INFO L125 PetriNetUnfolderBase]: For 5210/5385 co-relation queries the response was YES. [2024-11-27 20:24:59,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17475 conditions, 5460 events. 3908/5460 cut-off events. For 5210/5385 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26470 event pairs, 579 based on Foata normal form. 196/5648 useless extension candidates. Maximal degree in co-relation 13898. Up to 1086 conditions per place. [2024-11-27 20:24:59,026 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 166 selfloop transitions, 18 changer transitions 0/188 dead transitions. [2024-11-27 20:24:59,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 188 transitions, 1113 flow [2024-11-27 20:24:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:24:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 20:24:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-11-27 20:24:59,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2024-11-27 20:24:59,028 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 225 flow. Second operand 14 states and 284 transitions. [2024-11-27 20:24:59,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 188 transitions, 1113 flow [2024-11-27 20:24:59,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 188 transitions, 1080 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:24:59,040 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 289 flow [2024-11-27 20:24:59,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=289, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-11-27 20:24:59,041 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-11-27 20:24:59,041 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 289 flow [2024-11-27 20:24:59,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 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) [2024-11-27 20:24:59,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:24:59,041 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:24:59,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 20:24:59,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:59,246 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:24:59,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:24:59,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1677774127, now seen corresponding path program 1 times [2024-11-27 20:24:59,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:24:59,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145956532] [2024-11-27 20:24:59,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:59,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:24:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:59,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:24:59,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145956532] [2024-11-27 20:24:59,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145956532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:24:59,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383301430] [2024-11-27 20:24:59,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:24:59,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:24:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:24:59,429 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:24:59,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:24:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:24:59,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:24:59,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:24:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:59,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:24:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:24:59,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383301430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:24:59,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:24:59,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 20:24:59,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367590501] [2024-11-27 20:24:59,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:24:59,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:24:59,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:24:59,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:24:59,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:24:59,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:24:59,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 289 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2024-11-27 20:24:59,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:24:59,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:24:59,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:00,509 INFO L124 PetriNetUnfolderBase]: 3490/4946 cut-off events. [2024-11-27 20:25:00,509 INFO L125 PetriNetUnfolderBase]: For 13012/13313 co-relation queries the response was YES. [2024-11-27 20:25:00,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17192 conditions, 4946 events. 3490/4946 cut-off events. For 13012/13313 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22873 event pairs, 2241 based on Foata normal form. 34/4950 useless extension candidates. Maximal degree in co-relation 14413. Up to 4047 conditions per place. [2024-11-27 20:25:00,537 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-27 20:25:00,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 645 flow [2024-11-27 20:25:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:25:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:25:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-11-27 20:25:00,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-27 20:25:00,539 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 289 flow. Second operand 8 states and 146 transitions. [2024-11-27 20:25:00,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 645 flow [2024-11-27 20:25:00,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 560 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-11-27 20:25:00,552 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 293 flow [2024-11-27 20:25:00,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=293, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-11-27 20:25:00,555 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-11-27 20:25:00,555 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 293 flow [2024-11-27 20:25:00,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2024-11-27 20:25:00,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:00,557 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:25:00,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:25:00,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:00,757 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:00,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash 401770150, now seen corresponding path program 2 times [2024-11-27 20:25:00,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:00,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443389223] [2024-11-27 20:25:00,758 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:25:00,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:00,781 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:25:00,781 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:25:01,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:01,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443389223] [2024-11-27 20:25:01,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443389223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:01,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680583625] [2024-11-27 20:25:01,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:25:01,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:01,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:01,004 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:25:01,083 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:25:01,084 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:01,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:25:01,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:01,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 20:25:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:25:01,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:25:01,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680583625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:01,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:01,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-27 20:25:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499190932] [2024-11-27 20:25:01,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:01,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 20:25:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:01,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 20:25:01,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:25:02,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:02,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 293 flow. Second operand has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 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) [2024-11-27 20:25:02,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:02,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:02,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:02,869 INFO L124 PetriNetUnfolderBase]: 3196/4498 cut-off events. [2024-11-27 20:25:02,869 INFO L125 PetriNetUnfolderBase]: For 7437/7665 co-relation queries the response was YES. [2024-11-27 20:25:02,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15044 conditions, 4498 events. 3196/4498 cut-off events. For 7437/7665 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20502 event pairs, 673 based on Foata normal form. 103/4593 useless extension candidates. Maximal degree in co-relation 12315. Up to 1506 conditions per place. [2024-11-27 20:25:02,889 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 106 selfloop transitions, 13 changer transitions 0/125 dead transitions. [2024-11-27 20:25:02,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 125 transitions, 893 flow [2024-11-27 20:25:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:25:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:25:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-11-27 20:25:02,890 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3657142857142857 [2024-11-27 20:25:02,891 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 293 flow. Second operand 7 states and 128 transitions. [2024-11-27 20:25:02,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 125 transitions, 893 flow [2024-11-27 20:25:02,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 125 transitions, 880 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-27 20:25:02,901 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 314 flow [2024-11-27 20:25:02,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-11-27 20:25:02,902 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-11-27 20:25:02,902 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 314 flow [2024-11-27 20:25:02,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 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) [2024-11-27 20:25:02,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:02,903 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] [2024-11-27 20:25:02,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:25:03,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 20:25:03,104 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:03,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:03,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1215388462, now seen corresponding path program 1 times [2024-11-27 20:25:03,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:03,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846215244] [2024-11-27 20:25:03,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:25:03,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:25:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:25:03,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:03,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846215244] [2024-11-27 20:25:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846215244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:03,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505852237] [2024-11-27 20:25:03,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:25:03,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:03,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:03,221 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:03,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:25:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:25:03,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:25:03,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:03,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:03,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505852237] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:03,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:25:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-27 20:25:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011762407] [2024-11-27 20:25:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:25:03,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:25:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:03,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:25:03,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:25:03,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:03,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:25:03,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:03,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:03,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:03,870 INFO L124 PetriNetUnfolderBase]: 3186/4557 cut-off events. [2024-11-27 20:25:03,870 INFO L125 PetriNetUnfolderBase]: For 10138/10335 co-relation queries the response was YES. [2024-11-27 20:25:03,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16189 conditions, 4557 events. 3186/4557 cut-off events. For 10138/10335 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 21862 event pairs, 902 based on Foata normal form. 124/4580 useless extension candidates. Maximal degree in co-relation 13430. Up to 2571 conditions per place. [2024-11-27 20:25:03,957 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 65 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-11-27 20:25:03,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 589 flow [2024-11-27 20:25:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:25:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:25:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-27 20:25:03,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-27 20:25:03,958 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 314 flow. Second operand 5 states and 88 transitions. [2024-11-27 20:25:03,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 589 flow [2024-11-27 20:25:03,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 537 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-27 20:25:03,974 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 308 flow [2024-11-27 20:25:03,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-11-27 20:25:03,974 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-11-27 20:25:03,975 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 308 flow [2024-11-27 20:25:03,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:25:03,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:03,975 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] [2024-11-27 20:25:03,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 20:25:04,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 20:25:04,176 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:04,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1543074844, now seen corresponding path program 1 times [2024-11-27 20:25:04,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:04,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104661143] [2024-11-27 20:25:04,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:25:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:25:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 20:25:04,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:04,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104661143] [2024-11-27 20:25:04,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104661143] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:25:04,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:25:04,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:25:04,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139088927] [2024-11-27 20:25:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:25:04,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:25:04,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:04,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:25:04,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:25:04,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:04,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-27 20:25:04,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:04,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:04,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:04,801 INFO L124 PetriNetUnfolderBase]: 2905/4204 cut-off events. [2024-11-27 20:25:04,801 INFO L125 PetriNetUnfolderBase]: For 10969/11193 co-relation queries the response was YES. [2024-11-27 20:25:04,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14640 conditions, 4204 events. 2905/4204 cut-off events. For 10969/11193 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20271 event pairs, 962 based on Foata normal form. 137/4233 useless extension candidates. Maximal degree in co-relation 12209. Up to 2222 conditions per place. [2024-11-27 20:25:04,822 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 62 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-11-27 20:25:04,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 572 flow [2024-11-27 20:25:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:25:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:25:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-27 20:25:04,823 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-27 20:25:04,824 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 308 flow. Second operand 4 states and 76 transitions. [2024-11-27 20:25:04,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 572 flow [2024-11-27 20:25:04,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 549 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-27 20:25:04,841 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 295 flow [2024-11-27 20:25:04,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2024-11-27 20:25:04,842 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-11-27 20:25:04,843 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 295 flow [2024-11-27 20:25:04,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-27 20:25:04,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:04,843 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] [2024-11-27 20:25:04,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 20:25:04,844 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:04,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:04,845 INFO L85 PathProgramCache]: Analyzing trace with hash -312957754, now seen corresponding path program 1 times [2024-11-27 20:25:04,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:04,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145346413] [2024-11-27 20:25:04,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:25:04,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:25:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:05,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145346413] [2024-11-27 20:25:05,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145346413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558698766] [2024-11-27 20:25:05,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:25:05,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:05,664 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:25:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:25:05,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 20:25:05,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:05,800 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 [2024-11-27 20:25:06,420 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 89 treesize of output 65 [2024-11-27 20:25:06,423 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 65 treesize of output 61 [2024-11-27 20:25:06,426 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 61 treesize of output 57 [2024-11-27 20:25:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:06,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:07,000 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 135 treesize of output 131 [2024-11-27 20:25:07,006 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 131 treesize of output 127 [2024-11-27 20:25:07,740 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 66 treesize of output 58 [2024-11-27 20:25:07,764 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 20:25:07,764 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 100 treesize of output 79 [2024-11-27 20:25:07,987 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 72 treesize of output 64 [2024-11-27 20:25:08,001 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:25:08,002 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 86 treesize of output 78 [2024-11-27 20:25:08,262 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 53 treesize of output 47 [2024-11-27 20:25:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:25:08,274 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2024-11-27 20:25:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:08,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558698766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:08,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:08,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-27 20:25:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014591928] [2024-11-27 20:25:08,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:08,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 20:25:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:08,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 20:25:08,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:25:08,938 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-27 20:25:08,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 295 flow. Second operand has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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) [2024-11-27 20:25:08,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:08,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-27 20:25:08,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:10,907 INFO L124 PetriNetUnfolderBase]: 2426/3728 cut-off events. [2024-11-27 20:25:10,907 INFO L125 PetriNetUnfolderBase]: For 8581/8766 co-relation queries the response was YES. [2024-11-27 20:25:10,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13228 conditions, 3728 events. 2426/3728 cut-off events. For 8581/8766 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18870 event pairs, 610 based on Foata normal form. 1/3723 useless extension candidates. Maximal degree in co-relation 10162. Up to 2906 conditions per place. [2024-11-27 20:25:10,924 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 74 selfloop transitions, 16 changer transitions 47/146 dead transitions. [2024-11-27 20:25:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 146 transitions, 956 flow [2024-11-27 20:25:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 20:25:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-27 20:25:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-27 20:25:10,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-27 20:25:10,926 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 295 flow. Second operand 16 states and 284 transitions. [2024-11-27 20:25:10,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 146 transitions, 956 flow [2024-11-27 20:25:10,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 146 transitions, 928 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:25:10,955 INFO L231 Difference]: Finished difference. Result has 94 places, 65 transitions, 391 flow [2024-11-27 20:25:10,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=391, PETRI_PLACES=94, PETRI_TRANSITIONS=65} [2024-11-27 20:25:10,956 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-11-27 20:25:10,956 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 65 transitions, 391 flow [2024-11-27 20:25:10,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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) [2024-11-27 20:25:10,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:10,956 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] [2024-11-27 20:25:10,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 20:25:11,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:25:11,160 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:11,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1808886258, now seen corresponding path program 2 times [2024-11-27 20:25:11,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:11,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873524378] [2024-11-27 20:25:11,161 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:25:11,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:11,181 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:25:11,181 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:11,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:11,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873524378] [2024-11-27 20:25:11,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873524378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:11,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419597898] [2024-11-27 20:25:11,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:25:11,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:11,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:11,809 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:11,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:25:11,904 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:25:11,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:11,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 20:25:11,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:11,957 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 [2024-11-27 20:25:12,332 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 89 treesize of output 65 [2024-11-27 20:25:12,337 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 65 treesize of output 61 [2024-11-27 20:25:12,340 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 61 treesize of output 57 [2024-11-27 20:25:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:12,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:12,636 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 135 treesize of output 131 [2024-11-27 20:25:12,639 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 131 treesize of output 127 [2024-11-27 20:25:13,982 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 53 treesize of output 47 [2024-11-27 20:25:14,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:25:14,002 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 64 treesize of output 58 [2024-11-27 20:25:14,077 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 66 treesize of output 58 [2024-11-27 20:25:14,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:25:14,086 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2024-11-27 20:25:14,116 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 72 treesize of output 64 [2024-11-27 20:25:14,129 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:25:14,129 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 86 treesize of output 78 [2024-11-27 20:25:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419597898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:14,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:14,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-27 20:25:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324604430] [2024-11-27 20:25:14,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:14,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 20:25:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:14,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 20:25:14,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:25:14,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:14,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 65 transitions, 391 flow. Second operand has 25 states, 25 states have (on average 11.72) internal successors, (293), 25 states have internal predecessors, (293), 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) [2024-11-27 20:25:14,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:14,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:14,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:17,742 INFO L124 PetriNetUnfolderBase]: 3150/4770 cut-off events. [2024-11-27 20:25:17,742 INFO L125 PetriNetUnfolderBase]: For 12694/12797 co-relation queries the response was YES. [2024-11-27 20:25:17,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17900 conditions, 4770 events. 3150/4770 cut-off events. For 12694/12797 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 24116 event pairs, 794 based on Foata normal form. 10/4654 useless extension candidates. Maximal degree in co-relation 17868. Up to 3822 conditions per place. [2024-11-27 20:25:17,763 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 115 selfloop transitions, 67 changer transitions 38/227 dead transitions. [2024-11-27 20:25:17,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 227 transitions, 1714 flow [2024-11-27 20:25:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 20:25:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-27 20:25:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 482 transitions. [2024-11-27 20:25:17,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30125 [2024-11-27 20:25:17,766 INFO L175 Difference]: Start difference. First operand has 94 places, 65 transitions, 391 flow. Second operand 32 states and 482 transitions. [2024-11-27 20:25:17,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 227 transitions, 1714 flow [2024-11-27 20:25:17,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 227 transitions, 1663 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-11-27 20:25:17,807 INFO L231 Difference]: Finished difference. Result has 129 places, 119 transitions, 1001 flow [2024-11-27 20:25:17,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1001, PETRI_PLACES=129, PETRI_TRANSITIONS=119} [2024-11-27 20:25:17,808 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 77 predicate places. [2024-11-27 20:25:17,808 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 119 transitions, 1001 flow [2024-11-27 20:25:17,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.72) internal successors, (293), 25 states have internal predecessors, (293), 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) [2024-11-27 20:25:17,809 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:17,809 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] [2024-11-27 20:25:17,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 20:25:18,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 20:25:18,009 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:18,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash 361235128, now seen corresponding path program 3 times [2024-11-27 20:25:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:18,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175256172] [2024-11-27 20:25:18,010 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:25:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:18,036 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:25:18,036 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:25:18,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:18,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175256172] [2024-11-27 20:25:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175256172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:18,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778464810] [2024-11-27 20:25:18,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:25:18,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:18,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:18,473 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:18,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:25:18,561 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:25:18,561 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:18,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 20:25:18,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:18,612 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 [2024-11-27 20:25:18,916 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 89 treesize of output 65 [2024-11-27 20:25:18,918 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 65 treesize of output 61 [2024-11-27 20:25:18,921 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 61 treesize of output 57 [2024-11-27 20:25:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:18,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:19,173 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 135 treesize of output 131 [2024-11-27 20:25:19,177 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 131 treesize of output 127 [2024-11-27 20:25:20,283 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 53 treesize of output 47 [2024-11-27 20:25:20,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:25:20,298 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 64 treesize of output 58 [2024-11-27 20:25:20,354 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 72 treesize of output 64 [2024-11-27 20:25:20,365 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:25:20,366 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 86 treesize of output 78 [2024-11-27 20:25:20,531 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 66 treesize of output 58 [2024-11-27 20:25:20,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:25:20,541 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2024-11-27 20:25:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:20,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778464810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:20,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:20,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-27 20:25:20,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886140687] [2024-11-27 20:25:20,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:20,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 20:25:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:20,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 20:25:20,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:25:20,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:20,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 119 transitions, 1001 flow. Second operand has 23 states, 23 states have (on average 11.782608695652174) internal successors, (271), 23 states have internal predecessors, (271), 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) [2024-11-27 20:25:20,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:20,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:20,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:23,394 INFO L124 PetriNetUnfolderBase]: 3306/5102 cut-off events. [2024-11-27 20:25:23,394 INFO L125 PetriNetUnfolderBase]: For 19662/19794 co-relation queries the response was YES. [2024-11-27 20:25:23,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21887 conditions, 5102 events. 3306/5102 cut-off events. For 19662/19794 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27490 event pairs, 805 based on Foata normal form. 11/4987 useless extension candidates. Maximal degree in co-relation 21829. Up to 3907 conditions per place. [2024-11-27 20:25:23,424 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 175 selfloop transitions, 90 changer transitions 28/300 dead transitions. [2024-11-27 20:25:23,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 300 transitions, 2833 flow [2024-11-27 20:25:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-27 20:25:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-27 20:25:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 464 transitions. [2024-11-27 20:25:23,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-11-27 20:25:23,427 INFO L175 Difference]: Start difference. First operand has 129 places, 119 transitions, 1001 flow. Second operand 29 states and 464 transitions. [2024-11-27 20:25:23,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 300 transitions, 2833 flow [2024-11-27 20:25:23,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 300 transitions, 2693 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-11-27 20:25:23,483 INFO L231 Difference]: Finished difference. Result has 152 places, 174 transitions, 1703 flow [2024-11-27 20:25:23,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1703, PETRI_PLACES=152, PETRI_TRANSITIONS=174} [2024-11-27 20:25:23,484 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 100 predicate places. [2024-11-27 20:25:23,484 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 174 transitions, 1703 flow [2024-11-27 20:25:23,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.782608695652174) internal successors, (271), 23 states have internal predecessors, (271), 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) [2024-11-27 20:25:23,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:23,484 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] [2024-11-27 20:25:23,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 20:25:23,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 20:25:23,685 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:23,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:23,685 INFO L85 PathProgramCache]: Analyzing trace with hash -140276740, now seen corresponding path program 4 times [2024-11-27 20:25:23,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:23,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983299230] [2024-11-27 20:25:23,686 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:25:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:23,711 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:25:23,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:24,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983299230] [2024-11-27 20:25:24,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983299230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:24,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81983850] [2024-11-27 20:25:24,105 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:25:24,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:24,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:24,107 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:24,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:25:24,190 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:25:24,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:24,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-27 20:25:24,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:24,247 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 [2024-11-27 20:25:24,546 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 79 treesize of output 55 [2024-11-27 20:25:24,548 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 55 treesize of output 51 [2024-11-27 20:25:24,550 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 51 treesize of output 47 [2024-11-27 20:25:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:24,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:24,773 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 135 treesize of output 131 [2024-11-27 20:25:24,776 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 131 treesize of output 127 [2024-11-27 20:25:25,649 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 66 treesize of output 58 [2024-11-27 20:25:25,665 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 20:25:25,666 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 100 treesize of output 79 [2024-11-27 20:25:25,846 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 53 treesize of output 47 [2024-11-27 20:25:25,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:25:25,859 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 64 treesize of output 58 [2024-11-27 20:25:25,934 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 72 treesize of output 64 [2024-11-27 20:25:25,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:25:25,951 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 86 treesize of output 82 [2024-11-27 20:25:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:26,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81983850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:26,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:26,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-27 20:25:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784910431] [2024-11-27 20:25:26,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:26,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 20:25:26,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:26,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 20:25:26,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:25:26,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:26,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 174 transitions, 1703 flow. Second operand has 24 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 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) [2024-11-27 20:25:26,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:26,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:26,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:29,007 INFO L124 PetriNetUnfolderBase]: 3257/5015 cut-off events. [2024-11-27 20:25:29,007 INFO L125 PetriNetUnfolderBase]: For 22264/22421 co-relation queries the response was YES. [2024-11-27 20:25:29,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22803 conditions, 5015 events. 3257/5015 cut-off events. For 22264/22421 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26903 event pairs, 1054 based on Foata normal form. 12/4900 useless extension candidates. Maximal degree in co-relation 22537. Up to 4113 conditions per place. [2024-11-27 20:25:29,040 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 154 selfloop transitions, 80 changer transitions 52/293 dead transitions. [2024-11-27 20:25:29,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 293 transitions, 2993 flow [2024-11-27 20:25:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 20:25:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-27 20:25:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 472 transitions. [2024-11-27 20:25:29,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.295 [2024-11-27 20:25:29,043 INFO L175 Difference]: Start difference. First operand has 152 places, 174 transitions, 1703 flow. Second operand 32 states and 472 transitions. [2024-11-27 20:25:29,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 293 transitions, 2993 flow [2024-11-27 20:25:29,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 293 transitions, 2793 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-11-27 20:25:29,108 INFO L231 Difference]: Finished difference. Result has 183 places, 185 transitions, 1818 flow [2024-11-27 20:25:29,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1818, PETRI_PLACES=183, PETRI_TRANSITIONS=185} [2024-11-27 20:25:29,109 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 131 predicate places. [2024-11-27 20:25:29,109 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 185 transitions, 1818 flow [2024-11-27 20:25:29,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 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) [2024-11-27 20:25:29,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:29,109 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] [2024-11-27 20:25:29,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 20:25:29,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:29,310 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:29,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:29,311 INFO L85 PathProgramCache]: Analyzing trace with hash -636414116, now seen corresponding path program 5 times [2024-11-27 20:25:29,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:29,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815682719] [2024-11-27 20:25:29,311 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:25:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:29,334 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:25:29,338 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:29,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815682719] [2024-11-27 20:25:29,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815682719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683366294] [2024-11-27 20:25:29,928 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:25:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:29,934 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:29,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:25:30,018 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:25:30,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:30,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-27 20:25:30,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:30,055 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 [2024-11-27 20:25:30,320 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 79 treesize of output 55 [2024-11-27 20:25:30,322 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 55 treesize of output 51 [2024-11-27 20:25:30,324 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 51 treesize of output 47 [2024-11-27 20:25:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:30,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:30,533 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 135 treesize of output 131 [2024-11-27 20:25:30,539 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 131 treesize of output 127 [2024-11-27 20:25:31,490 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 72 treesize of output 64 [2024-11-27 20:25:31,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:25:31,508 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 86 treesize of output 82 [2024-11-27 20:25:31,686 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 53 treesize of output 47 [2024-11-27 20:25:31,702 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 20:25:31,702 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 64 treesize of output 53 [2024-11-27 20:25:31,726 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 66 treesize of output 58 [2024-11-27 20:25:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:25:31,734 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2024-11-27 20:25:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:31,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683366294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:31,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:31,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-27 20:25:31,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712677227] [2024-11-27 20:25:31,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:31,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:25:31,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:31,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:25:31,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:25:32,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-27 20:25:32,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 185 transitions, 1818 flow. Second operand has 22 states, 22 states have (on average 12.863636363636363) internal successors, (283), 22 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:25:32,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:32,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-27 20:25:32,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:34,138 INFO L124 PetriNetUnfolderBase]: 2607/4124 cut-off events. [2024-11-27 20:25:34,139 INFO L125 PetriNetUnfolderBase]: For 18922/19146 co-relation queries the response was YES. [2024-11-27 20:25:34,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19117 conditions, 4124 events. 2607/4124 cut-off events. For 18922/19146 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22826 event pairs, 560 based on Foata normal form. 20/4143 useless extension candidates. Maximal degree in co-relation 19049. Up to 3286 conditions per place. [2024-11-27 20:25:34,162 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 162 selfloop transitions, 48 changer transitions 44/263 dead transitions. [2024-11-27 20:25:34,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 263 transitions, 2836 flow [2024-11-27 20:25:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 20:25:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-27 20:25:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 345 transitions. [2024-11-27 20:25:34,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2024-11-27 20:25:34,164 INFO L175 Difference]: Start difference. First operand has 183 places, 185 transitions, 1818 flow. Second operand 21 states and 345 transitions. [2024-11-27 20:25:34,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 263 transitions, 2836 flow [2024-11-27 20:25:34,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 263 transitions, 2667 flow, removed 52 selfloop flow, removed 17 redundant places. [2024-11-27 20:25:34,223 INFO L231 Difference]: Finished difference. Result has 183 places, 179 transitions, 1689 flow [2024-11-27 20:25:34,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1689, PETRI_PLACES=183, PETRI_TRANSITIONS=179} [2024-11-27 20:25:34,224 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 131 predicate places. [2024-11-27 20:25:34,224 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 179 transitions, 1689 flow [2024-11-27 20:25:34,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.863636363636363) internal successors, (283), 22 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:25:34,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:34,224 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] [2024-11-27 20:25:34,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 20:25:34,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:34,425 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:34,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash 27774700, now seen corresponding path program 6 times [2024-11-27 20:25:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:34,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989132257] [2024-11-27 20:25:34,426 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:25:34,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:34,448 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:25:34,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:25:34,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989132257] [2024-11-27 20:25:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989132257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262577613] [2024-11-27 20:25:34,937 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:25:34,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:34,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:34,939 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:34,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:25:35,024 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:25:35,025 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:35,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 20:25:35,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:35,066 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 [2024-11-27 20:25:35,366 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 79 treesize of output 55 [2024-11-27 20:25:35,368 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 55 treesize of output 51 [2024-11-27 20:25:35,371 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 51 treesize of output 47 [2024-11-27 20:25:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:35,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:35,691 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 116 treesize of output 112 [2024-11-27 20:25:35,694 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 112 treesize of output 108 [2024-11-27 20:25:36,556 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 68 treesize of output 60 [2024-11-27 20:25:36,558 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 82 treesize of output 74 [2024-11-27 20:25:36,603 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 45 treesize of output 39 [2024-11-27 20:25:36,605 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 56 treesize of output 50 [2024-11-27 20:25:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:36,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262577613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:36,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:36,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-11-27 20:25:36,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620953703] [2024-11-27 20:25:36,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:36,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:25:36,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:36,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:25:36,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:25:36,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:36,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 179 transitions, 1689 flow. Second operand has 22 states, 22 states have (on average 11.545454545454545) internal successors, (254), 22 states have internal predecessors, (254), 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) [2024-11-27 20:25:36,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:36,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:36,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:39,219 INFO L124 PetriNetUnfolderBase]: 4015/6138 cut-off events. [2024-11-27 20:25:39,219 INFO L125 PetriNetUnfolderBase]: For 30416/30637 co-relation queries the response was YES. [2024-11-27 20:25:39,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28151 conditions, 6138 events. 4015/6138 cut-off events. For 30416/30637 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33829 event pairs, 908 based on Foata normal form. 14/5975 useless extension candidates. Maximal degree in co-relation 28096. Up to 4383 conditions per place. [2024-11-27 20:25:39,261 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 201 selfloop transitions, 107 changer transitions 20/335 dead transitions. [2024-11-27 20:25:39,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 335 transitions, 3387 flow [2024-11-27 20:25:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 20:25:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-27 20:25:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 407 transitions. [2024-11-27 20:25:39,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3256 [2024-11-27 20:25:39,263 INFO L175 Difference]: Start difference. First operand has 183 places, 179 transitions, 1689 flow. Second operand 25 states and 407 transitions. [2024-11-27 20:25:39,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 335 transitions, 3387 flow [2024-11-27 20:25:39,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 335 transitions, 3256 flow, removed 15 selfloop flow, removed 15 redundant places. [2024-11-27 20:25:39,340 INFO L231 Difference]: Finished difference. Result has 191 places, 229 transitions, 2389 flow [2024-11-27 20:25:39,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2389, PETRI_PLACES=191, PETRI_TRANSITIONS=229} [2024-11-27 20:25:39,341 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 139 predicate places. [2024-11-27 20:25:39,341 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 229 transitions, 2389 flow [2024-11-27 20:25:39,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.545454545454545) internal successors, (254), 22 states have internal predecessors, (254), 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) [2024-11-27 20:25:39,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:39,341 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] [2024-11-27 20:25:39,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-27 20:25:39,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 20:25:39,542 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:39,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1034732824, now seen corresponding path program 7 times [2024-11-27 20:25:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:39,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082913777] [2024-11-27 20:25:39,542 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:25:39,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:25:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:40,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082913777] [2024-11-27 20:25:40,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082913777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:40,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247436622] [2024-11-27 20:25:40,081 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:25:40,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:40,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:40,083 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:40,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:25:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:25:40,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 20:25:40,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:40,221 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 [2024-11-27 20:25:40,513 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 89 treesize of output 65 [2024-11-27 20:25:40,516 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 65 treesize of output 61 [2024-11-27 20:25:40,518 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 61 treesize of output 57 [2024-11-27 20:25:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:40,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:40,832 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 116 treesize of output 112 [2024-11-27 20:25:40,836 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 112 treesize of output 108 [2024-11-27 20:25:41,713 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 117 treesize of output 105 [2024-11-27 20:25:41,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:25:41,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-11-27 20:25:42,495 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 100 treesize of output 92 [2024-11-27 20:25:42,528 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-27 20:25:42,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 110 [2024-11-27 20:25:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:25:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247436622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:43,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-11-27 20:25:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312279350] [2024-11-27 20:25:43,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:43,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 20:25:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:43,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 20:25:43,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:25:43,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-27 20:25:43,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 229 transitions, 2389 flow. Second operand has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 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) [2024-11-27 20:25:43,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:43,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-27 20:25:43,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:45,580 INFO L124 PetriNetUnfolderBase]: 3624/5663 cut-off events. [2024-11-27 20:25:45,580 INFO L125 PetriNetUnfolderBase]: For 31905/32264 co-relation queries the response was YES. [2024-11-27 20:25:45,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28009 conditions, 5663 events. 3624/5663 cut-off events. For 31905/32264 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32363 event pairs, 549 based on Foata normal form. 87/5683 useless extension candidates. Maximal degree in co-relation 27951. Up to 4699 conditions per place. [2024-11-27 20:25:45,627 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 171 selfloop transitions, 35 changer transitions 62/281 dead transitions. [2024-11-27 20:25:45,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 281 transitions, 3200 flow [2024-11-27 20:25:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 20:25:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-27 20:25:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 281 transitions. [2024-11-27 20:25:45,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3305882352941176 [2024-11-27 20:25:45,628 INFO L175 Difference]: Start difference. First operand has 191 places, 229 transitions, 2389 flow. Second operand 17 states and 281 transitions. [2024-11-27 20:25:45,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 281 transitions, 3200 flow [2024-11-27 20:25:45,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 281 transitions, 2852 flow, removed 101 selfloop flow, removed 15 redundant places. [2024-11-27 20:25:45,830 INFO L231 Difference]: Finished difference. Result has 193 places, 205 transitions, 1869 flow [2024-11-27 20:25:45,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1869, PETRI_PLACES=193, PETRI_TRANSITIONS=205} [2024-11-27 20:25:45,830 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 141 predicate places. [2024-11-27 20:25:45,830 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 205 transitions, 1869 flow [2024-11-27 20:25:45,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 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) [2024-11-27 20:25:45,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:45,831 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2024-11-27 20:25:45,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:25:46,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-27 20:25:46,031 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:46,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1318775041, now seen corresponding path program 8 times [2024-11-27 20:25:46,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:46,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814037721] [2024-11-27 20:25:46,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:25:46,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:46,041 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:25:46,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:25:46,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:46,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814037721] [2024-11-27 20:25:46,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814037721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:46,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161451324] [2024-11-27 20:25:46,120 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:25:46,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:46,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:46,123 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:46,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:25:46,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:25:46,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:46,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:25:46,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:25:46,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:25:46,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161451324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:46,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:46,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-27 20:25:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469040363] [2024-11-27 20:25:46,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:46,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:25:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:46,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:25:46,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:25:46,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-27 20:25:46,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 205 transitions, 1869 flow. Second operand has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 13 states have internal predecessors, (158), 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) [2024-11-27 20:25:46,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:46,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-27 20:25:46,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:47,383 INFO L124 PetriNetUnfolderBase]: 4290/6374 cut-off events. [2024-11-27 20:25:47,383 INFO L125 PetriNetUnfolderBase]: For 28728/29210 co-relation queries the response was YES. [2024-11-27 20:25:47,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29297 conditions, 6374 events. 4290/6374 cut-off events. For 28728/29210 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34574 event pairs, 561 based on Foata normal form. 311/6607 useless extension candidates. Maximal degree in co-relation 29247. Up to 2079 conditions per place. [2024-11-27 20:25:47,414 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 219 selfloop transitions, 40 changer transitions 0/269 dead transitions. [2024-11-27 20:25:47,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 269 transitions, 2799 flow [2024-11-27 20:25:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:25:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 20:25:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-11-27 20:25:47,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3488888888888889 [2024-11-27 20:25:47,416 INFO L175 Difference]: Start difference. First operand has 193 places, 205 transitions, 1869 flow. Second operand 9 states and 157 transitions. [2024-11-27 20:25:47,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 269 transitions, 2799 flow [2024-11-27 20:25:47,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 269 transitions, 2535 flow, removed 28 selfloop flow, removed 24 redundant places. [2024-11-27 20:25:47,499 INFO L231 Difference]: Finished difference. Result has 151 places, 204 transitions, 1713 flow [2024-11-27 20:25:47,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1713, PETRI_PLACES=151, PETRI_TRANSITIONS=204} [2024-11-27 20:25:47,500 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2024-11-27 20:25:47,500 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 204 transitions, 1713 flow [2024-11-27 20:25:47,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 13 states have internal predecessors, (158), 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) [2024-11-27 20:25:47,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:47,500 INFO L206 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, 1] [2024-11-27 20:25:47,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 20:25:47,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-27 20:25:47,701 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:47,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1041147555, now seen corresponding path program 9 times [2024-11-27 20:25:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002016119] [2024-11-27 20:25:47,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:25:47,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:47,714 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:25:47,714 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:25:47,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:47,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002016119] [2024-11-27 20:25:47,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002016119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030758751] [2024-11-27 20:25:47,802 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:25:47,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:47,804 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:47,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:25:47,892 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:25:47,892 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:47,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:25:47,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:25:48,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:25:48,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030758751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:48,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:48,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-27 20:25:48,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433958162] [2024-11-27 20:25:48,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:48,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:25:48,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:48,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:25:48,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:25:48,161 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-11-27 20:25:48,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 204 transitions, 1713 flow. Second operand has 18 states, 18 states have (on average 9.833333333333334) internal successors, (177), 18 states have internal predecessors, (177), 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) [2024-11-27 20:25:48,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:48,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-11-27 20:25:48,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:50,801 INFO L124 PetriNetUnfolderBase]: 12464/17678 cut-off events. [2024-11-27 20:25:50,802 INFO L125 PetriNetUnfolderBase]: For 66299/66299 co-relation queries the response was YES. [2024-11-27 20:25:50,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75650 conditions, 17678 events. 12464/17678 cut-off events. For 66299/66299 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 96004 event pairs, 1064 based on Foata normal form. 0/17269 useless extension candidates. Maximal degree in co-relation 75614. Up to 5535 conditions per place. [2024-11-27 20:25:50,920 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 720 selfloop transitions, 210 changer transitions 0/931 dead transitions. [2024-11-27 20:25:50,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 931 transitions, 9364 flow [2024-11-27 20:25:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-27 20:25:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-27 20:25:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 570 transitions. [2024-11-27 20:25:50,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32571428571428573 [2024-11-27 20:25:50,923 INFO L175 Difference]: Start difference. First operand has 151 places, 204 transitions, 1713 flow. Second operand 35 states and 570 transitions. [2024-11-27 20:25:50,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 931 transitions, 9364 flow [2024-11-27 20:25:51,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 931 transitions, 8974 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-27 20:25:51,391 INFO L231 Difference]: Finished difference. Result has 200 places, 401 transitions, 3928 flow [2024-11-27 20:25:51,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3928, PETRI_PLACES=200, PETRI_TRANSITIONS=401} [2024-11-27 20:25:51,391 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 148 predicate places. [2024-11-27 20:25:51,391 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 401 transitions, 3928 flow [2024-11-27 20:25:51,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.833333333333334) internal successors, (177), 18 states have internal predecessors, (177), 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) [2024-11-27 20:25:51,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:51,392 INFO L206 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, 1] [2024-11-27 20:25:51,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 20:25:51,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:51,592 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:51,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash 197647115, now seen corresponding path program 10 times [2024-11-27 20:25:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116676656] [2024-11-27 20:25:51,593 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:25:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:51,605 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:25:51,605 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:25:51,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:51,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116676656] [2024-11-27 20:25:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116676656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945497174] [2024-11-27 20:25:51,704 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:25:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:51,706 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:51,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:25:51,800 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:25:51,801 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:51,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:25:51,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:25:51,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:25:52,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945497174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:52,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:52,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-27 20:25:52,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427549534] [2024-11-27 20:25:52,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:52,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 20:25:52,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:52,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 20:25:52,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:25:52,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-11-27 20:25:52,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 401 transitions, 3928 flow. Second operand has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:25:52,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:52,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-11-27 20:25:52,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:25:56,306 INFO L124 PetriNetUnfolderBase]: 16240/23108 cut-off events. [2024-11-27 20:25:56,306 INFO L125 PetriNetUnfolderBase]: For 197617/197617 co-relation queries the response was YES. [2024-11-27 20:25:56,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127350 conditions, 23108 events. 16240/23108 cut-off events. For 197617/197617 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 132464 event pairs, 2348 based on Foata normal form. 0/22691 useless extension candidates. Maximal degree in co-relation 127292. Up to 7383 conditions per place. [2024-11-27 20:25:56,510 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 597 selfloop transitions, 295 changer transitions 0/893 dead transitions. [2024-11-27 20:25:56,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 893 transitions, 10818 flow [2024-11-27 20:25:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 20:25:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-27 20:25:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 435 transitions. [2024-11-27 20:25:56,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2024-11-27 20:25:56,512 INFO L175 Difference]: Start difference. First operand has 200 places, 401 transitions, 3928 flow. Second operand 27 states and 435 transitions. [2024-11-27 20:25:56,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 893 transitions, 10818 flow [2024-11-27 20:25:58,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 893 transitions, 10496 flow, removed 80 selfloop flow, removed 2 redundant places. [2024-11-27 20:25:58,558 INFO L231 Difference]: Finished difference. Result has 247 places, 607 transitions, 7110 flow [2024-11-27 20:25:58,558 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7110, PETRI_PLACES=247, PETRI_TRANSITIONS=607} [2024-11-27 20:25:58,559 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 195 predicate places. [2024-11-27 20:25:58,559 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 607 transitions, 7110 flow [2024-11-27 20:25:58,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:25:58,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:25:58,559 INFO L206 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, 1] [2024-11-27 20:25:58,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:25:58,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:58,760 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:25:58,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:25:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 404014933, now seen corresponding path program 11 times [2024-11-27 20:25:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:25:58,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966178144] [2024-11-27 20:25:58,760 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:25:58,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:25:58,776 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 20:25:58,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:25:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:25:58,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966178144] [2024-11-27 20:25:58,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966178144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:25:58,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490504973] [2024-11-27 20:25:58,907 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:25:58,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:25:58,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:25:58,909 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:25:58,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:25:59,010 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 20:25:59,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:25:59,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:25:59,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:25:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:25:59,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:25:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:25:59,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490504973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:25:59,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:25:59,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-27 20:25:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433476312] [2024-11-27 20:25:59,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:25:59,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 20:25:59,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:25:59,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 20:25:59,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:25:59,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-27 20:25:59,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 607 transitions, 7110 flow. Second operand has 19 states, 19 states have (on average 10.736842105263158) internal successors, (204), 19 states have internal predecessors, (204), 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) [2024-11-27 20:25:59,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:25:59,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-27 20:25:59,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:04,620 INFO L124 PetriNetUnfolderBase]: 14936/22128 cut-off events. [2024-11-27 20:26:04,620 INFO L125 PetriNetUnfolderBase]: For 452899/453203 co-relation queries the response was YES. [2024-11-27 20:26:04,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154866 conditions, 22128 events. 14936/22128 cut-off events. For 452899/453203 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 142691 event pairs, 1438 based on Foata normal form. 98/22157 useless extension candidates. Maximal degree in co-relation 154785. Up to 7904 conditions per place. [2024-11-27 20:26:04,916 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 781 selfloop transitions, 293 changer transitions 0/1108 dead transitions. [2024-11-27 20:26:04,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1108 transitions, 15240 flow [2024-11-27 20:26:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 20:26:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-27 20:26:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 292 transitions. [2024-11-27 20:26:04,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34352941176470586 [2024-11-27 20:26:04,918 INFO L175 Difference]: Start difference. First operand has 247 places, 607 transitions, 7110 flow. Second operand 17 states and 292 transitions. [2024-11-27 20:26:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1108 transitions, 15240 flow [2024-11-27 20:26:07,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 1108 transitions, 14452 flow, removed 327 selfloop flow, removed 1 redundant places. [2024-11-27 20:26:07,454 INFO L231 Difference]: Finished difference. Result has 272 places, 715 transitions, 9028 flow [2024-11-27 20:26:07,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6577, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9028, PETRI_PLACES=272, PETRI_TRANSITIONS=715} [2024-11-27 20:26:07,455 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 220 predicate places. [2024-11-27 20:26:07,455 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 715 transitions, 9028 flow [2024-11-27 20:26:07,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.736842105263158) internal successors, (204), 19 states have internal predecessors, (204), 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) [2024-11-27 20:26:07,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:07,455 INFO L206 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, 1] [2024-11-27 20:26:07,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-27 20:26:07,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-27 20:26:07,656 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:26:07,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1791003581, now seen corresponding path program 12 times [2024-11-27 20:26:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:07,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209052879] [2024-11-27 20:26:07,656 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:26:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:07,674 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:26:07,674 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:26:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:26:07,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:07,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209052879] [2024-11-27 20:26:07,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209052879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:26:07,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876473374] [2024-11-27 20:26:07,761 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:26:07,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:07,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:26:07,763 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:26:07,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:26:07,850 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:26:07,850 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:26:07,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:26:07,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:26:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:26:07,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:26:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:26:08,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876473374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:26:08,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:26:08,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-27 20:26:08,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141755601] [2024-11-27 20:26:08,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:26:08,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:26:08,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:08,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:26:08,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:26:08,036 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-11-27 20:26:08,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 715 transitions, 9028 flow. Second operand has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 17 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:08,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-11-27 20:26:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:19,578 INFO L124 PetriNetUnfolderBase]: 34157/47584 cut-off events. [2024-11-27 20:26:19,578 INFO L125 PetriNetUnfolderBase]: For 1239014/1239014 co-relation queries the response was YES. [2024-11-27 20:26:20,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372041 conditions, 47584 events. 34157/47584 cut-off events. For 1239014/1239014 co-relation queries the response was YES. Maximal size of possible extension queue 1380. Compared 287567 event pairs, 1495 based on Foata normal form. 8/47592 useless extension candidates. Maximal degree in co-relation 371949. Up to 15449 conditions per place. [2024-11-27 20:26:20,519 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 1099 selfloop transitions, 791 changer transitions 0/1891 dead transitions. [2024-11-27 20:26:20,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1891 transitions, 28726 flow [2024-11-27 20:26:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-27 20:26:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-27 20:26:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 682 transitions. [2024-11-27 20:26:20,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36864864864864866 [2024-11-27 20:26:20,522 INFO L175 Difference]: Start difference. First operand has 272 places, 715 transitions, 9028 flow. Second operand 37 states and 682 transitions. [2024-11-27 20:26:20,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1891 transitions, 28726 flow [2024-11-27 20:26:33,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 1891 transitions, 28509 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-11-27 20:26:33,243 INFO L231 Difference]: Finished difference. Result has 321 places, 1220 transitions, 18632 flow [2024-11-27 20:26:33,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=8961, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18632, PETRI_PLACES=321, PETRI_TRANSITIONS=1220} [2024-11-27 20:26:33,244 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 269 predicate places. [2024-11-27 20:26:33,244 INFO L471 AbstractCegarLoop]: Abstraction has has 321 places, 1220 transitions, 18632 flow [2024-11-27 20:26:33,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.647058823529411) internal successors, (164), 17 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:33,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:26:33,244 INFO L206 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, 1] [2024-11-27 20:26:33,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 20:26:33,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:33,445 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-27 20:26:33,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:26:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash 769180561, now seen corresponding path program 13 times [2024-11-27 20:26:33,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:26:33,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040054562] [2024-11-27 20:26:33,445 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:26:33,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:26:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:26:33,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:26:33,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040054562] [2024-11-27 20:26:33,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040054562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:26:33,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928936052] [2024-11-27 20:26:33,564 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:26:33,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:26:33,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:26:33,568 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:26:33,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_091e1634-7e3c-4a3d-9108-8ed6fef8e8e7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:26:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:26:33,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:26:33,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:26:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:26:33,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:26:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:26:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928936052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:26:33,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:26:33,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-27 20:26:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144626108] [2024-11-27 20:26:33,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:26:33,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:26:33,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:26:33,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:26:33,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:26:33,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-27 20:26:33,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1220 transitions, 18632 flow. Second operand has 18 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:26:33,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:26:33,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-27 20:26:33,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:26:46,003 INFO L124 PetriNetUnfolderBase]: 25474/36608 cut-off events. [2024-11-27 20:26:46,003 INFO L125 PetriNetUnfolderBase]: For 1450723/1451841 co-relation queries the response was YES. [2024-11-27 20:26:46,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320190 conditions, 36608 events. 25474/36608 cut-off events. For 1450723/1451841 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 240465 event pairs, 2021 based on Foata normal form. 164/36566 useless extension candidates. Maximal degree in co-relation 320082. Up to 12731 conditions per place. [2024-11-27 20:26:46,937 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 1031 selfloop transitions, 523 changer transitions 0/1588 dead transitions. [2024-11-27 20:26:46,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1588 transitions, 28400 flow [2024-11-27 20:26:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:26:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 20:26:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-11-27 20:26:46,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3353846153846154 [2024-11-27 20:26:46,941 INFO L175 Difference]: Start difference. First operand has 321 places, 1220 transitions, 18632 flow. Second operand 13 states and 218 transitions. [2024-11-27 20:26:46,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1588 transitions, 28400 flow