./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:31:32,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:31:32,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:31:32,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:31:32,190 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:31:32,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:31:32,227 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:31:32,227 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:31:32,228 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:31:32,229 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:31:32,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:31:32,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:31:32,231 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:31:32,231 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:31:32,233 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:31:32,233 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:31:32,234 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:31:32,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:31:32,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:31:32,234 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:31:32,235 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:31:32,237 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:31:32,238 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:31:32,238 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:31:32,238 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:31:32,238 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:31:32,239 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:31:32,239 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:31:32,239 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:31:32,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:31:32,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:31:32,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:31:32,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:31:32,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:31:32,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:31:32,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:31:32,241 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:31:32,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:31:32,243 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:31:32,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:31:32,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:31:32,244 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:31:32,244 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-12 16:31:32,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:31:32,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:31:32,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:31:32,538 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:31:32,539 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:31:32,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-12 16:31:33,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:31:34,150 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:31:34,151 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-12 16:31:34,162 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f3ca418/1ca743c4a21f46e5a284b4ff93571676/FLAG9f30ecb31 [2024-11-12 16:31:34,178 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6f3ca418/1ca743c4a21f46e5a284b4ff93571676 [2024-11-12 16:31:34,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:31:34,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:31:34,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:31:34,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:31:34,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:31:34,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48294f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34, skipping insertion in model container [2024-11-12 16:31:34,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,220 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:31:34,420 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:31:34,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:31:34,430 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:31:34,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:31:34,472 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:31:34,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34 WrapperNode [2024-11-12 16:31:34,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:31:34,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:31:34,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:31:34,474 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:31:34,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,514 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2024-11-12 16:31:34,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:31:34,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:31:34,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:31:34,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:31:34,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,528 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,542 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2024-11-12 16:31:34,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:31:34,561 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:31:34,561 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:31:34,561 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:31:34,562 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (1/1) ... [2024-11-12 16:31:34,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:31:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:34,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 16:31:34,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 16:31:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:31:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:31:34,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:31:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:31:34,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:31:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:31:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:31:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:31:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:31:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 16:31:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 16:31:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:31:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:31:34,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:31:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:31:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:31:34,646 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:31:34,735 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:31:34,738 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:31:35,097 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:31:35,097 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:31:35,297 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:31:35,297 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 16:31:35,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:31:35 BoogieIcfgContainer [2024-11-12 16:31:35,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:31:35,300 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:31:35,300 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:31:35,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:31:35,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:31:34" (1/3) ... [2024-11-12 16:31:35,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48fd946e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:31:35, skipping insertion in model container [2024-11-12 16:31:35,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:34" (2/3) ... [2024-11-12 16:31:35,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48fd946e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:31:35, skipping insertion in model container [2024-11-12 16:31:35,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:31:35" (3/3) ... [2024-11-12 16:31:35,307 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-12 16:31:35,326 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:31:35,326 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-12 16:31:35,326 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:31:35,385 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:31:35,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2024-11-12 16:31:35,455 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2024-11-12 16:31:35,458 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:31:35,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-12 16:31:35,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2024-11-12 16:31:35,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2024-11-12 16:31:35,479 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:31:35,489 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;@3ad2a106, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:31:35,489 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-12 16:31:35,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:31:35,493 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:31:35,494 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:31:35,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:35,494 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:31:35,495 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:35,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 456965, now seen corresponding path program 1 times [2024-11-12 16:31:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:35,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969590206] [2024-11-12 16:31:35,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:35,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:35,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969590206] [2024-11-12 16:31:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969590206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:35,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:31:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307731573] [2024-11-12 16:31:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:35,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:35,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-12 16:31:35,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 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) [2024-11-12 16:31:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:35,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-12 16:31:35,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:36,019 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2024-11-12 16:31:36,020 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-12 16:31:36,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2429 event pairs, 250 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2024-11-12 16:31:36,028 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-12 16:31:36,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2024-11-12 16:31:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-12 16:31:36,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-11-12 16:31:36,042 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2024-11-12 16:31:36,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2024-11-12 16:31:36,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:31:36,048 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-12 16:31:36,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-12 16:31:36,054 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-12 16:31:36,055 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-12 16:31:36,055 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) [2024-11-12 16:31:36,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:36,056 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:31:36,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:31:36,057 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:36,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:36,058 INFO L85 PathProgramCache]: Analyzing trace with hash 456966, now seen corresponding path program 1 times [2024-11-12 16:31:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:36,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461965193] [2024-11-12 16:31:36,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:36,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:36,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461965193] [2024-11-12 16:31:36,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461965193] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:36,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:36,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:31:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196401109] [2024-11-12 16:31:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:36,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:36,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-12 16:31:36,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 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) [2024-11-12 16:31:36,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:36,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-12 16:31:36,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:36,583 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2024-11-12 16:31:36,583 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:31:36,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2443 event pairs, 250 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2024-11-12 16:31:36,588 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-12 16:31:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2024-11-12 16:31:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-12 16:31:36,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-11-12 16:31:36,590 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-11-12 16:31:36,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2024-11-12 16:31:36,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:36,592 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-11-12 16:31:36,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-11-12 16:31:36,593 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-12 16:31:36,593 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-11-12 16:31:36,594 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) [2024-11-12 16:31:36,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:36,595 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:31:36,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:31:36,596 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:36,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash 439158271, now seen corresponding path program 1 times [2024-11-12 16:31:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595000835] [2024-11-12 16:31:36,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:36,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:36,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595000835] [2024-11-12 16:31:36,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595000835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:36,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138019352] [2024-11-12 16:31:36,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:36,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:36,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:36,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:31:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:36,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:31:36,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:37,019 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 [2024-11-12 16:31:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:37,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138019352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:37,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:37,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:31:37,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028973191] [2024-11-12 16:31:37,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:37,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:31:37,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:31:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:31:37,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-12 16:31:37,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 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) [2024-11-12 16:31:37,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:37,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-12 16:31:37,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:37,674 INFO L124 PetriNetUnfolderBase]: 309/552 cut-off events. [2024-11-12 16:31:37,674 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-12 16:31:37,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 552 events. 309/552 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2433 event pairs, 250 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1056. Up to 498 conditions per place. [2024-11-12 16:31:37,680 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 25 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-11-12 16:31:37,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 161 flow [2024-11-12 16:31:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:31:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:31:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-11-12 16:31:37,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-11-12 16:31:37,684 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 6 states and 87 transitions. [2024-11-12 16:31:37,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 161 flow [2024-11-12 16:31:37,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:37,686 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-12 16:31:37,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-12 16:31:37,688 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2024-11-12 16:31:37,688 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-12 16:31:37,689 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) [2024-11-12 16:31:37,689 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:37,689 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:37,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:31:37,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:37,894 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:37,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1210182854, now seen corresponding path program 1 times [2024-11-12 16:31:37,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:37,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2963808] [2024-11-12 16:31:37,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:37,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2963808] [2024-11-12 16:31:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2963808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:37,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:31:37,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168601893] [2024-11-12 16:31:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:37,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:37,940 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:37,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-12 16:31:37,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:37,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:37,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:38,058 INFO L124 PetriNetUnfolderBase]: 404/742 cut-off events. [2024-11-12 16:31:38,059 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-12 16:31:38,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 742 events. 404/742 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3426 event pairs, 186 based on Foata normal form. 22/525 useless extension candidates. Maximal degree in co-relation 1428. Up to 420 conditions per place. [2024-11-12 16:31:38,064 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 47 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-11-12 16:31:38,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 246 flow [2024-11-12 16:31:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-11-12 16:31:38,067 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-11-12 16:31:38,068 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 3 states and 80 transitions. [2024-11-12 16:31:38,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 246 flow [2024-11-12 16:31:38,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 216 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-12 16:31:38,070 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 101 flow [2024-11-12 16:31:38,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-11-12 16:31:38,071 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-12 16:31:38,071 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 101 flow [2024-11-12 16:31:38,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-12 16:31:38,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:38,071 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:38,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:31:38,071 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:38,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1340572448, now seen corresponding path program 1 times [2024-11-12 16:31:38,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:38,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601913886] [2024-11-12 16:31:38,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601913886] [2024-11-12 16:31:38,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601913886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:38,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:38,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:31:38,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109409412] [2024-11-12 16:31:38,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:38,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:38,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:38,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-12 16:31:38,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:38,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:38,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-12 16:31:38,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:38,261 INFO L124 PetriNetUnfolderBase]: 303/568 cut-off events. [2024-11-12 16:31:38,261 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-12 16:31:38,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 568 events. 303/568 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2437 event pairs, 246 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 460. Up to 510 conditions per place. [2024-11-12 16:31:38,265 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 28 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-12 16:31:38,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 155 flow [2024-11-12 16:31:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-12 16:31:38,267 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-11-12 16:31:38,267 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 101 flow. Second operand 4 states and 65 transitions. [2024-11-12 16:31:38,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 155 flow [2024-11-12 16:31:38,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:38,268 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 96 flow [2024-11-12 16:31:38,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-12 16:31:38,269 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-12 16:31:38,269 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 96 flow [2024-11-12 16:31:38,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:38,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:38,270 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:38,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:31:38,270 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:38,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1340572447, now seen corresponding path program 1 times [2024-11-12 16:31:38,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:38,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066447680] [2024-11-12 16:31:38,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:38,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:38,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066447680] [2024-11-12 16:31:38,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066447680] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:38,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:38,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:38,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222945667] [2024-11-12 16:31:38,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:38,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:38,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:38,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:38,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-11-12 16:31:38,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:38,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:38,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:38,461 INFO L124 PetriNetUnfolderBase]: 370/705 cut-off events. [2024-11-12 16:31:38,461 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-12 16:31:38,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 705 events. 370/705 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3132 event pairs, 314 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 1155. Up to 513 conditions per place. [2024-11-12 16:31:38,466 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 42 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2024-11-12 16:31:38,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 222 flow [2024-11-12 16:31:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-12 16:31:38,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-11-12 16:31:38,468 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 96 flow. Second operand 4 states and 85 transitions. [2024-11-12 16:31:38,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 222 flow [2024-11-12 16:31:38,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:38,470 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 101 flow [2024-11-12 16:31:38,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-12 16:31:38,471 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-12 16:31:38,472 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 101 flow [2024-11-12 16:31:38,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-11-12 16:31:38,472 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:38,472 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:38,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:31:38,472 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:38,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1756260920, now seen corresponding path program 1 times [2024-11-12 16:31:38,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:38,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531234583] [2024-11-12 16:31:38,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531234583] [2024-11-12 16:31:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531234583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036401525] [2024-11-12 16:31:38,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:38,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:38,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:38,635 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:38,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:31:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:38,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:31:38,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:38,823 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:31:38,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036401525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:38,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:31:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-12 16:31:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855667828] [2024-11-12 16:31:38,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:38,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:31:38,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:31:38,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:31:38,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:38,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 101 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) [2024-11-12 16:31:38,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:38,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:38,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:38,991 INFO L124 PetriNetUnfolderBase]: 281/562 cut-off events. [2024-11-12 16:31:38,992 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-12 16:31:38,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 562 events. 281/562 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2419 event pairs, 202 based on Foata normal form. 48/546 useless extension candidates. Maximal degree in co-relation 870. Up to 437 conditions per place. [2024-11-12 16:31:38,995 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 27 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-11-12 16:31:38,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 180 flow [2024-11-12 16:31:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-11-12 16:31:38,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-11-12 16:31:38,996 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 101 flow. Second operand 5 states and 84 transitions. [2024-11-12 16:31:38,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 180 flow [2024-11-12 16:31:38,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:39,000 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 104 flow [2024-11-12 16:31:39,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-11-12 16:31:39,001 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-12 16:31:39,002 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 104 flow [2024-11-12 16:31:39,002 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) [2024-11-12 16:31:39,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:39,002 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:39,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:31:39,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-12 16:31:39,204 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:39,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1108381587, now seen corresponding path program 1 times [2024-11-12 16:31:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539288400] [2024-11-12 16:31:39,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:39,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:39,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539288400] [2024-11-12 16:31:39,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539288400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:39,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:39,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:31:39,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962389476] [2024-11-12 16:31:39,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:39,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:39,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:39,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:39,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:39,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:39,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:39,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:39,337 INFO L124 PetriNetUnfolderBase]: 355/670 cut-off events. [2024-11-12 16:31:39,337 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2024-11-12 16:31:39,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 670 events. 355/670 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2786 event pairs, 220 based on Foata normal form. 3/600 useless extension candidates. Maximal degree in co-relation 1228. Up to 459 conditions per place. [2024-11-12 16:31:39,341 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 35 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-11-12 16:31:39,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 232 flow [2024-11-12 16:31:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-12 16:31:39,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-11-12 16:31:39,342 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 104 flow. Second operand 3 states and 68 transitions. [2024-11-12 16:31:39,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 232 flow [2024-11-12 16:31:39,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 210 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:31:39,344 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 97 flow [2024-11-12 16:31:39,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-12 16:31:39,345 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-12 16:31:39,345 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 97 flow [2024-11-12 16:31:39,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:39,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:39,346 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] [2024-11-12 16:31:39,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:31:39,346 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:39,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:39,347 INFO L85 PathProgramCache]: Analyzing trace with hash -258662319, now seen corresponding path program 1 times [2024-11-12 16:31:39,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:39,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328835332] [2024-11-12 16:31:39,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:40,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328835332] [2024-11-12 16:31:40,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328835332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:40,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042438409] [2024-11-12 16:31:40,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:40,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:40,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:31:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:40,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:31:40,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:40,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-12 16:31:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:40,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:40,997 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 61 treesize of output 55 [2024-11-12 16:31:41,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:31:41,015 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 78 treesize of output 68 [2024-11-12 16:31:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:31:41,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042438409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:41,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:41,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-12 16:31:41,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668255046] [2024-11-12 16:31:41,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:41,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:31:41,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:31:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:31:41,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:41,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 97 flow. Second operand has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2024-11-12 16:31:41,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:41,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:41,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:42,935 INFO L124 PetriNetUnfolderBase]: 1547/2943 cut-off events. [2024-11-12 16:31:42,936 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2024-11-12 16:31:42,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6366 conditions, 2943 events. 1547/2943 cut-off events. For 797/797 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 17465 event pairs, 321 based on Foata normal form. 35/2646 useless extension candidates. Maximal degree in co-relation 5178. Up to 521 conditions per place. [2024-11-12 16:31:42,948 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 144 selfloop transitions, 39 changer transitions 62/250 dead transitions. [2024-11-12 16:31:42,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 250 transitions, 1194 flow [2024-11-12 16:31:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-12 16:31:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-12 16:31:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 473 transitions. [2024-11-12 16:31:42,950 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-12 16:31:42,950 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 97 flow. Second operand 22 states and 473 transitions. [2024-11-12 16:31:42,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 250 transitions, 1194 flow [2024-11-12 16:31:42,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 250 transitions, 1162 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:42,956 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 465 flow [2024-11-12 16:31:42,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=465, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2024-11-12 16:31:42,957 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-11-12 16:31:42,957 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 465 flow [2024-11-12 16:31:42,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2024-11-12 16:31:42,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:42,958 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] [2024-11-12 16:31:42,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 16:31:43,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:43,162 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:43,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1644429965, now seen corresponding path program 1 times [2024-11-12 16:31:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:43,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623710565] [2024-11-12 16:31:43,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:31:43,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623710565] [2024-11-12 16:31:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623710565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:43,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:43,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:43,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969739126] [2024-11-12 16:31:43,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:43,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:43,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:43,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-11-12 16:31:43,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 465 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-12 16:31:43,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:43,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-11-12 16:31:43,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:43,532 INFO L124 PetriNetUnfolderBase]: 1606/2830 cut-off events. [2024-11-12 16:31:43,532 INFO L125 PetriNetUnfolderBase]: For 2542/2542 co-relation queries the response was YES. [2024-11-12 16:31:43,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7205 conditions, 2830 events. 1606/2830 cut-off events. For 2542/2542 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 15008 event pairs, 1054 based on Foata normal form. 22/2656 useless extension candidates. Maximal degree in co-relation 7164. Up to 2325 conditions per place. [2024-11-12 16:31:43,546 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 76 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2024-11-12 16:31:43,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 634 flow [2024-11-12 16:31:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-12 16:31:43,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-11-12 16:31:43,547 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 465 flow. Second operand 3 states and 64 transitions. [2024-11-12 16:31:43,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 634 flow [2024-11-12 16:31:43,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 550 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:43,558 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 326 flow [2024-11-12 16:31:43,558 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-11-12 16:31:43,559 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-11-12 16:31:43,559 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 326 flow [2024-11-12 16:31:43,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-12 16:31:43,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:43,559 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:43,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:31:43,559 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:43,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1682861776, now seen corresponding path program 2 times [2024-11-12 16:31:43,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:43,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734982534] [2024-11-12 16:31:43,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:31:44,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:44,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734982534] [2024-11-12 16:31:44,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734982534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:44,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708486905] [2024-11-12 16:31:44,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:31:44,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:44,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:44,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:31:44,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:31:44,283 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:31:44,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:31:44,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:31:44,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:44,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:31:44,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-12 16:31:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:31:44,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708486905] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:44,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:31:44,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 14 [2024-11-12 16:31:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22940870] [2024-11-12 16:31:44,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:44,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:44,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:44,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:31:44,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:44,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:44,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:44,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:44,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:44,869 INFO L124 PetriNetUnfolderBase]: 1310/2459 cut-off events. [2024-11-12 16:31:44,869 INFO L125 PetriNetUnfolderBase]: For 1953/1953 co-relation queries the response was YES. [2024-11-12 16:31:44,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6145 conditions, 2459 events. 1310/2459 cut-off events. For 1953/1953 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13901 event pairs, 362 based on Foata normal form. 1/2296 useless extension candidates. Maximal degree in co-relation 5663. Up to 975 conditions per place. [2024-11-12 16:31:44,882 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 80 selfloop transitions, 9 changer transitions 10/105 dead transitions. [2024-11-12 16:31:44,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 646 flow [2024-11-12 16:31:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-12 16:31:44,883 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2024-11-12 16:31:44,884 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 326 flow. Second operand 5 states and 114 transitions. [2024-11-12 16:31:44,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 646 flow [2024-11-12 16:31:44,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 644 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:44,892 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 358 flow [2024-11-12 16:31:44,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-11-12 16:31:44,893 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-11-12 16:31:44,893 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 358 flow [2024-11-12 16:31:44,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:44,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:44,894 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-12 16:31:44,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:31:45,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:45,095 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:45,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash 78307836, now seen corresponding path program 3 times [2024-11-12 16:31:45,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:45,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987679703] [2024-11-12 16:31:45,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:45,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:31:45,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987679703] [2024-11-12 16:31:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987679703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755174014] [2024-11-12 16:31:45,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:31:45,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:45,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:45,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:31:45,249 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:31:45,249 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:31:45,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 16:31:45,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:31:45,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:31:45,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755174014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:45,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:45,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-11-12 16:31:45,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095532926] [2024-11-12 16:31:45,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:45,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:31:45,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:31:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:31:45,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:45,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-12 16:31:45,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:45,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:45,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:45,778 INFO L124 PetriNetUnfolderBase]: 2099/4032 cut-off events. [2024-11-12 16:31:45,778 INFO L125 PetriNetUnfolderBase]: For 3919/3919 co-relation queries the response was YES. [2024-11-12 16:31:45,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10179 conditions, 4032 events. 2099/4032 cut-off events. For 3919/3919 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 25285 event pairs, 800 based on Foata normal form. 38/3817 useless extension candidates. Maximal degree in co-relation 9644. Up to 1862 conditions per place. [2024-11-12 16:31:45,803 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 85 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-11-12 16:31:45,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 804 flow [2024-11-12 16:31:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-12 16:31:45,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2024-11-12 16:31:45,805 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 358 flow. Second operand 4 states and 93 transitions. [2024-11-12 16:31:45,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 804 flow [2024-11-12 16:31:45,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 760 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-12 16:31:45,819 INFO L231 Difference]: Finished difference. Result has 69 places, 86 transitions, 558 flow [2024-11-12 16:31:45,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=558, PETRI_PLACES=69, PETRI_TRANSITIONS=86} [2024-11-12 16:31:45,822 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-11-12 16:31:45,822 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 86 transitions, 558 flow [2024-11-12 16:31:45,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-12 16:31:45,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:45,823 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:45,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:31:46,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-12 16:31:46,024 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:46,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1690052271, now seen corresponding path program 4 times [2024-11-12 16:31:46,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:46,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88931137] [2024-11-12 16:31:46,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:46,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-12 16:31:46,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88931137] [2024-11-12 16:31:46,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88931137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:46,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:46,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:31:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064465801] [2024-11-12 16:31:46,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:46,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:46,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:46,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-11-12 16:31:46,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 86 transitions, 558 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-11-12 16:31:46,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:46,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-11-12 16:31:46,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:46,605 INFO L124 PetriNetUnfolderBase]: 2594/4508 cut-off events. [2024-11-12 16:31:46,606 INFO L125 PetriNetUnfolderBase]: For 5328/5328 co-relation queries the response was YES. [2024-11-12 16:31:46,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 4508 events. 2594/4508 cut-off events. For 5328/5328 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 24512 event pairs, 530 based on Foata normal form. 242/4408 useless extension candidates. Maximal degree in co-relation 12271. Up to 2229 conditions per place. [2024-11-12 16:31:46,636 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 81 selfloop transitions, 4 changer transitions 4/91 dead transitions. [2024-11-12 16:31:46,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 764 flow [2024-11-12 16:31:46,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-12 16:31:46,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-11-12 16:31:46,637 INFO L175 Difference]: Start difference. First operand has 69 places, 86 transitions, 558 flow. Second operand 4 states and 76 transitions. [2024-11-12 16:31:46,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 764 flow [2024-11-12 16:31:46,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 742 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:46,651 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 399 flow [2024-11-12 16:31:46,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=399, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-11-12 16:31:46,651 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-11-12 16:31:46,651 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 399 flow [2024-11-12 16:31:46,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-11-12 16:31:46,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:46,652 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 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] [2024-11-12 16:31:46,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:31:46,652 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:46,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1001308381, now seen corresponding path program 1 times [2024-11-12 16:31:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:46,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81762042] [2024-11-12 16:31:46,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:31:47,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81762042] [2024-11-12 16:31:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81762042] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006507805] [2024-11-12 16:31:47,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:47,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:47,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:47,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:47,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:31:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:47,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-12 16:31:47,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:47,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-12 16:31:48,070 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-12 16:31:48,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-12 16:31:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:31:48,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:48,931 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 116 treesize of output 104 [2024-11-12 16:31:48,973 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-12 16:31:48,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 196 [2024-11-12 16:31:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:31:49,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006507805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:49,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:49,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-11-12 16:31:49,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368289183] [2024-11-12 16:31:49,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:49,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 16:31:49,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:49,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 16:31:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-11-12 16:31:50,057 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:50,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 399 flow. Second operand has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2024-11-12 16:31:50,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:50,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:50,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:54,864 INFO L124 PetriNetUnfolderBase]: 5854/11234 cut-off events. [2024-11-12 16:31:54,864 INFO L125 PetriNetUnfolderBase]: For 16286/16298 co-relation queries the response was YES. [2024-11-12 16:31:54,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31283 conditions, 11234 events. 5854/11234 cut-off events. For 16286/16298 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 79260 event pairs, 948 based on Foata normal form. 85/10548 useless extension candidates. Maximal degree in co-relation 26241. Up to 1885 conditions per place. [2024-11-12 16:31:54,940 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 347 selfloop transitions, 115 changer transitions 111/580 dead transitions. [2024-11-12 16:31:54,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 580 transitions, 3637 flow [2024-11-12 16:31:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-12 16:31:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-12 16:31:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1056 transitions. [2024-11-12 16:31:54,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48153214774281805 [2024-11-12 16:31:54,946 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 399 flow. Second operand 51 states and 1056 transitions. [2024-11-12 16:31:54,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 580 transitions, 3637 flow [2024-11-12 16:31:54,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 580 transitions, 3631 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:54,974 INFO L231 Difference]: Finished difference. Result has 132 places, 185 transitions, 1866 flow [2024-11-12 16:31:54,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1866, PETRI_PLACES=132, PETRI_TRANSITIONS=185} [2024-11-12 16:31:54,974 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-11-12 16:31:54,975 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 185 transitions, 1866 flow [2024-11-12 16:31:54,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2024-11-12 16:31:54,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:54,975 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 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] [2024-11-12 16:31:54,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:31:55,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:55,176 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:31:55,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash -973165757, now seen corresponding path program 2 times [2024-11-12 16:31:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:55,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904912866] [2024-11-12 16:31:55,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:31:56,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904912866] [2024-11-12 16:31:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904912866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80309310] [2024-11-12 16:31:56,224 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:31:56,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:56,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:56,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:31:56,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:31:56,305 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:31:56,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:31:56,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-12 16:31:56,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:56,371 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 [2024-11-12 16:31:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:31:56,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:57,540 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 [2024-11-12 16:31:57,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:31:57,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 208 [2024-11-12 16:31:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:31:58,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80309310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:58,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:58,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-12 16:31:58,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084043155] [2024-11-12 16:31:58,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:58,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-12 16:31:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-12 16:31:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2024-11-12 16:31:58,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:31:58,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 185 transitions, 1866 flow. Second operand has 28 states, 28 states have (on average 13.214285714285714) internal successors, (370), 28 states have internal predecessors, (370), 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) [2024-11-12 16:31:58,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:58,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:31:58,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:04,101 INFO L124 PetriNetUnfolderBase]: 11416/21673 cut-off events. [2024-11-12 16:32:04,101 INFO L125 PetriNetUnfolderBase]: For 55510/55510 co-relation queries the response was YES. [2024-11-12 16:32:04,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65272 conditions, 21673 events. 11416/21673 cut-off events. For 55510/55510 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 164943 event pairs, 3357 based on Foata normal form. 65/20262 useless extension candidates. Maximal degree in co-relation 63567. Up to 7070 conditions per place. [2024-11-12 16:32:04,269 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 469 selfloop transitions, 163 changer transitions 182/821 dead transitions. [2024-11-12 16:32:04,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 821 transitions, 6668 flow [2024-11-12 16:32:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-12 16:32:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-11-12 16:32:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1155 transitions. [2024-11-12 16:32:04,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4974160206718346 [2024-11-12 16:32:04,274 INFO L175 Difference]: Start difference. First operand has 132 places, 185 transitions, 1866 flow. Second operand 54 states and 1155 transitions. [2024-11-12 16:32:04,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 821 transitions, 6668 flow [2024-11-12 16:32:04,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 821 transitions, 5418 flow, removed 621 selfloop flow, removed 4 redundant places. [2024-11-12 16:32:04,721 INFO L231 Difference]: Finished difference. Result has 206 places, 305 transitions, 2937 flow [2024-11-12 16:32:04,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2937, PETRI_PLACES=206, PETRI_TRANSITIONS=305} [2024-11-12 16:32:04,721 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-11-12 16:32:04,722 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 305 transitions, 2937 flow [2024-11-12 16:32:04,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.214285714285714) internal successors, (370), 28 states have internal predecessors, (370), 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) [2024-11-12 16:32:04,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:04,722 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 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] [2024-11-12 16:32:04,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:32:04,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:04,926 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:32:04,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -903118079, now seen corresponding path program 3 times [2024-11-12 16:32:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:04,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777044204] [2024-11-12 16:32:04,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:04,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:05,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:05,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777044204] [2024-11-12 16:32:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777044204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606965297] [2024-11-12 16:32:05,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:32:05,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:05,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:05,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:05,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:32:05,756 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-12 16:32:05,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:05,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:32:05,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:32:05,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:06,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:32:06,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-12 16:32:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:32:06,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606965297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:06,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:06,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2024-11-12 16:32:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889016954] [2024-11-12 16:32:06,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:06,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:32:06,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:32:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:32:06,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:32:06,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 305 transitions, 2937 flow. Second operand has 20 states, 20 states have (on average 14.3) internal successors, (286), 20 states have internal predecessors, (286), 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) [2024-11-12 16:32:06,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:06,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:32:06,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:10,336 INFO L124 PetriNetUnfolderBase]: 12206/23209 cut-off events. [2024-11-12 16:32:10,336 INFO L125 PetriNetUnfolderBase]: For 60482/60482 co-relation queries the response was YES. [2024-11-12 16:32:10,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66987 conditions, 23209 events. 12206/23209 cut-off events. For 60482/60482 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 181183 event pairs, 4478 based on Foata normal form. 11/21656 useless extension candidates. Maximal degree in co-relation 65186. Up to 13688 conditions per place. [2024-11-12 16:32:10,548 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 347 selfloop transitions, 64 changer transitions 67/485 dead transitions. [2024-11-12 16:32:10,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 485 transitions, 4597 flow [2024-11-12 16:32:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 16:32:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-12 16:32:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 414 transitions. [2024-11-12 16:32:10,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-11-12 16:32:10,551 INFO L175 Difference]: Start difference. First operand has 206 places, 305 transitions, 2937 flow. Second operand 20 states and 414 transitions. [2024-11-12 16:32:10,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 485 transitions, 4597 flow [2024-11-12 16:32:11,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 485 transitions, 4225 flow, removed 163 selfloop flow, removed 16 redundant places. [2024-11-12 16:32:11,210 INFO L231 Difference]: Finished difference. Result has 214 places, 317 transitions, 2929 flow [2024-11-12 16:32:11,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2929, PETRI_PLACES=214, PETRI_TRANSITIONS=317} [2024-11-12 16:32:11,211 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-11-12 16:32:11,211 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 317 transitions, 2929 flow [2024-11-12 16:32:11,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.3) internal successors, (286), 20 states have internal predecessors, (286), 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) [2024-11-12 16:32:11,212 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:11,212 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:11,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:32:11,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 16:32:11,413 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:32:11,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash 153179984, now seen corresponding path program 4 times [2024-11-12 16:32:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483896838] [2024-11-12 16:32:11,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 16:32:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483896838] [2024-11-12 16:32:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483896838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:11,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56764053] [2024-11-12 16:32:11,524 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 16:32:11,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:11,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:11,526 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:11,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:32:11,617 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 16:32:11,617 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:11,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:32:11,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 16:32:11,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-12 16:32:11,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56764053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:11,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:11,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-11-12 16:32:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238759171] [2024-11-12 16:32:11,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:11,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 16:32:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 16:32:11,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:32:11,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:32:11,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 317 transitions, 2929 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-11-12 16:32:11,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:11,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:32:11,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:15,828 INFO L124 PetriNetUnfolderBase]: 15192/29221 cut-off events. [2024-11-12 16:32:15,828 INFO L125 PetriNetUnfolderBase]: For 69683/69683 co-relation queries the response was YES. [2024-11-12 16:32:15,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83007 conditions, 29221 events. 15192/29221 cut-off events. For 69683/69683 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 237692 event pairs, 4877 based on Foata normal form. 118/27384 useless extension candidates. Maximal degree in co-relation 81613. Up to 13536 conditions per place. [2024-11-12 16:32:16,052 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 272 selfloop transitions, 157 changer transitions 0/436 dead transitions. [2024-11-12 16:32:16,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 436 transitions, 4859 flow [2024-11-12 16:32:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-12 16:32:16,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5488372093023256 [2024-11-12 16:32:16,054 INFO L175 Difference]: Start difference. First operand has 214 places, 317 transitions, 2929 flow. Second operand 5 states and 118 transitions. [2024-11-12 16:32:16,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 436 transitions, 4859 flow [2024-11-12 16:32:16,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 436 transitions, 4625 flow, removed 55 selfloop flow, removed 18 redundant places. [2024-11-12 16:32:16,617 INFO L231 Difference]: Finished difference. Result has 202 places, 376 transitions, 4073 flow [2024-11-12 16:32:16,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4073, PETRI_PLACES=202, PETRI_TRANSITIONS=376} [2024-11-12 16:32:16,618 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-11-12 16:32:16,618 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 376 transitions, 4073 flow [2024-11-12 16:32:16,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-11-12 16:32:16,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:16,618 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:16,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:32:16,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:32:16,819 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:32:16,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:16,820 INFO L85 PathProgramCache]: Analyzing trace with hash 292205183, now seen corresponding path program 5 times [2024-11-12 16:32:16,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:16,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99862011] [2024-11-12 16:32:16,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:16,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:32:16,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:16,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99862011] [2024-11-12 16:32:16,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99862011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:16,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596829606] [2024-11-12 16:32:16,978 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 16:32:16,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:16,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:16,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:16,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:32:17,070 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-12 16:32:17,071 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:17,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:32:17,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:32:17,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:32:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596829606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:17,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:17,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-12 16:32:17,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820043392] [2024-11-12 16:32:17,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:17,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 16:32:17,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:17,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 16:32:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:32:17,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:32:17,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 376 transitions, 4073 flow. Second operand has 17 states, 17 states have (on average 14.176470588235293) internal successors, (241), 17 states have internal predecessors, (241), 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) [2024-11-12 16:32:17,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:17,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:32:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:21,707 INFO L124 PetriNetUnfolderBase]: 14724/28204 cut-off events. [2024-11-12 16:32:21,707 INFO L125 PetriNetUnfolderBase]: For 75397/75397 co-relation queries the response was YES. [2024-11-12 16:32:21,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83477 conditions, 28204 events. 14724/28204 cut-off events. For 75397/75397 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 231601 event pairs, 7486 based on Foata normal form. 11/26320 useless extension candidates. Maximal degree in co-relation 80559. Up to 24337 conditions per place. [2024-11-12 16:32:21,927 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 346 selfloop transitions, 15 changer transitions 50/418 dead transitions. [2024-11-12 16:32:21,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 418 transitions, 4873 flow [2024-11-12 16:32:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:32:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:32:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-11-12 16:32:21,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-11-12 16:32:21,928 INFO L175 Difference]: Start difference. First operand has 202 places, 376 transitions, 4073 flow. Second operand 10 states and 184 transitions. [2024-11-12 16:32:21,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 418 transitions, 4873 flow [2024-11-12 16:32:22,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 418 transitions, 4769 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-11-12 16:32:22,416 INFO L231 Difference]: Finished difference. Result has 204 places, 363 transitions, 3813 flow [2024-11-12 16:32:22,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3824, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3813, PETRI_PLACES=204, PETRI_TRANSITIONS=363} [2024-11-12 16:32:22,416 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-11-12 16:32:22,417 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 363 transitions, 3813 flow [2024-11-12 16:32:22,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.176470588235293) internal successors, (241), 17 states have internal predecessors, (241), 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) [2024-11-12 16:32:22,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:22,417 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:22,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:22,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:32:22,618 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:32:22,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 571268127, now seen corresponding path program 6 times [2024-11-12 16:32:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:22,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058528876] [2024-11-12 16:32:22,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:22,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:23,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:23,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058528876] [2024-11-12 16:32:23,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058528876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:23,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991455954] [2024-11-12 16:32:23,559 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 16:32:23,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:23,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:23,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:32:23,637 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-12 16:32:23,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:23,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 16:32:23,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:24,171 INFO L349 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2024-11-12 16:32:24,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2024-11-12 16:32:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:24,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:24,621 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-12 16:32:24,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-11-12 16:32:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:25,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991455954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:25,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:25,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-11-12 16:32:25,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955832865] [2024-11-12 16:32:25,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:25,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-12 16:32:25,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-12 16:32:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2024-11-12 16:32:25,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:32:25,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 363 transitions, 3813 flow. Second operand has 31 states, 31 states have (on average 13.387096774193548) internal successors, (415), 31 states have internal predecessors, (415), 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) [2024-11-12 16:32:25,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:25,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:32:25,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:41,440 INFO L124 PetriNetUnfolderBase]: 39038/74547 cut-off events. [2024-11-12 16:32:41,440 INFO L125 PetriNetUnfolderBase]: For 234657/234657 co-relation queries the response was YES. [2024-11-12 16:32:42,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223541 conditions, 74547 events. 39038/74547 cut-off events. For 234657/234657 co-relation queries the response was YES. Maximal size of possible extension queue 1391. Compared 696150 event pairs, 7356 based on Foata normal form. 248/69825 useless extension candidates. Maximal degree in co-relation 215272. Up to 13160 conditions per place. [2024-11-12 16:32:42,551 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 751 selfloop transitions, 794 changer transitions 160/1712 dead transitions. [2024-11-12 16:32:42,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1712 transitions, 18751 flow [2024-11-12 16:32:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-12 16:32:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-11-12 16:32:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1472 transitions. [2024-11-12 16:32:42,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5109337035751476 [2024-11-12 16:32:42,555 INFO L175 Difference]: Start difference. First operand has 204 places, 363 transitions, 3813 flow. Second operand 67 states and 1472 transitions. [2024-11-12 16:32:42,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1712 transitions, 18751 flow [2024-11-12 16:32:44,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1712 transitions, 18527 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-11-12 16:32:44,445 INFO L231 Difference]: Finished difference. Result has 302 places, 1035 transitions, 15649 flow [2024-11-12 16:32:44,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=15649, PETRI_PLACES=302, PETRI_TRANSITIONS=1035} [2024-11-12 16:32:44,446 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-11-12 16:32:44,446 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 1035 transitions, 15649 flow [2024-11-12 16:32:44,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 13.387096774193548) internal successors, (415), 31 states have internal predecessors, (415), 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) [2024-11-12 16:32:44,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:44,447 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:44,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:44,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:44,647 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-12 16:32:44,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1496649547, now seen corresponding path program 7 times [2024-11-12 16:32:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:44,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306099756] [2024-11-12 16:32:44,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:44,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:45,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:45,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306099756] [2024-11-12 16:32:45,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306099756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:45,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262439086] [2024-11-12 16:32:45,406 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 16:32:45,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:45,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:45,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:45,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:32:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:45,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-12 16:32:45,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:45,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:46,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:32:46,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-12 16:32:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262439086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:46,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:46,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-12 16:32:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297578646] [2024-11-12 16:32:46,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:46,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 16:32:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 16:32:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2024-11-12 16:32:46,807 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-12 16:32:46,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1035 transitions, 15649 flow. Second operand has 29 states, 29 states have (on average 13.379310344827585) internal successors, (388), 29 states have internal predecessors, (388), 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) [2024-11-12 16:32:46,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:46,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-12 16:32:46,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand