./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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-bad-commit-2.wvr-bad.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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:36:23,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:36:23,591 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:36:23,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:36:23,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:36:23,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:36:23,635 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:36:23,635 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:36:23,636 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:36:23,636 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:36:23,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:36:23,637 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:36:23,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:36:23,638 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:36:23,641 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:36:23,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:36:23,642 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:36:23,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:36:23,642 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:36:23,642 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:36:23,642 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:36:23,643 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:36:23,643 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:36:23,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:36:23,647 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:36:23,647 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:36:23,648 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:36:23,648 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:36:23,648 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:36:23,648 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:36:23,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:36:23,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:36:23,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:36:23,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:23,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:36:23,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:36:23,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:36:23,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:36:23,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:36:23,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:36:23,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:36:23,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:36:23,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2024-11-17 03:36:23,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:36:23,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:36:23,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:36:23,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:36:23,933 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:36:23,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-11-17 03:36:25,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:36:25,440 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:36:25,441 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-11-17 03:36:25,451 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72df28c/33326693afe143cc95dea0b2de1762fd/FLAG517c9ddae [2024-11-17 03:36:25,840 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d72df28c/33326693afe143cc95dea0b2de1762fd [2024-11-17 03:36:25,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:36:25,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:36:25,845 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:25,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:36:25,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:36:25,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:25" (1/1) ... [2024-11-17 03:36:25,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f851e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:25, skipping insertion in model container [2024-11-17 03:36:25,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:25" (1/1) ... [2024-11-17 03:36:25,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:36:26,106 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:36:26,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:26,120 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:36:26,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:26,166 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:36:26,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26 WrapperNode [2024-11-17 03:36:26,167 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:26,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:26,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:36:26,168 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:36:26,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,228 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 455 [2024-11-17 03:36:26,231 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:26,232 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:36:26,232 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:36:26,232 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:36:26,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,256 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,319 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-17 03:36:26,319 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,319 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,327 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,328 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,333 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:36:26,334 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:36:26,334 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:36:26,334 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:36:26,335 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (1/1) ... [2024-11-17 03:36:26,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:26,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:26,372 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) [2024-11-17 03:36:26,376 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 [2024-11-17 03:36:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:36:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:36:26,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:36:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:36:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:36:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 03:36:26,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:36:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:36:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:36:26,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:36:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:36:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:36:26,412 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:36:26,500 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:36:26,502 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:36:26,966 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:36:26,966 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:36:27,285 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:36:27,286 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:36:27,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:27 BoogieIcfgContainer [2024-11-17 03:36:27,287 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:36:27,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:36:27,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:36:27,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:36:27,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:25" (1/3) ... [2024-11-17 03:36:27,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644d7a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:27, skipping insertion in model container [2024-11-17 03:36:27,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:26" (2/3) ... [2024-11-17 03:36:27,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644d7a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:27, skipping insertion in model container [2024-11-17 03:36:27,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:27" (3/3) ... [2024-11-17 03:36:27,296 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2024-11-17 03:36:27,309 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:36:27,309 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-17 03:36:27,309 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:36:27,375 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:36:27,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 134 transitions, 296 flow [2024-11-17 03:36:27,450 INFO L124 PetriNetUnfolderBase]: 28/130 cut-off events. [2024-11-17 03:36:27,450 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:36:27,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 130 events. 28/130 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 389 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2024-11-17 03:36:27,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 134 transitions, 296 flow [2024-11-17 03:36:27,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 129 transitions, 282 flow [2024-11-17 03:36:27,469 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:36:27,475 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;@3603af41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:36:27,475 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-17 03:36:27,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:36:27,479 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:36:27,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:36:27,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:27,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:36:27,480 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-17 03:36:27,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 39860708, now seen corresponding path program 1 times [2024-11-17 03:36:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:27,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942164221] [2024-11-17 03:36:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:27,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:27,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942164221] [2024-11-17 03:36:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942164221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:27,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:27,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:36:27,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815642719] [2024-11-17 03:36:27,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:27,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:36:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:36:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:36:27,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 134 [2024-11-17 03:36:27,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2024-11-17 03:36:27,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:27,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 134 [2024-11-17 03:36:27,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:39,779 INFO L124 PetriNetUnfolderBase]: 118506/156595 cut-off events. [2024-11-17 03:36:39,780 INFO L125 PetriNetUnfolderBase]: For 3374/3374 co-relation queries the response was YES. [2024-11-17 03:36:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304619 conditions, 156595 events. 118506/156595 cut-off events. For 3374/3374 co-relation queries the response was YES. Maximal size of possible extension queue 12291. Compared 1172336 event pairs, 87208 based on Foata normal form. 5/82204 useless extension candidates. Maximal degree in co-relation 296868. Up to 144091 conditions per place. [2024-11-17 03:36:40,926 INFO L140 encePairwiseOnDemand]: 119/134 looper letters, 76 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-11-17 03:36:40,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 410 flow [2024-11-17 03:36:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:36:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:36:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-11-17 03:36:40,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398009950248757 [2024-11-17 03:36:40,938 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 282 flow. Second operand 3 states and 217 transitions. [2024-11-17 03:36:40,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 410 flow [2024-11-17 03:36:41,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 115 transitions, 394 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:36:41,394 INFO L231 Difference]: Finished difference. Result has 102 places, 115 transitions, 242 flow [2024-11-17 03:36:41,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=102, PETRI_TRANSITIONS=115} [2024-11-17 03:36:41,399 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -12 predicate places. [2024-11-17 03:36:41,399 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 115 transitions, 242 flow [2024-11-17 03:36:41,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2024-11-17 03:36:41,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:41,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:36:41,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:36:41,400 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-17 03:36:41,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 39860709, now seen corresponding path program 1 times [2024-11-17 03:36:41,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:41,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014408129] [2024-11-17 03:36:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:41,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:41,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014408129] [2024-11-17 03:36:41,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014408129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:41,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:41,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:36:41,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977047175] [2024-11-17 03:36:41,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:41,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:41,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 134 [2024-11-17 03:36:41,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 115 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 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) [2024-11-17 03:36:41,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:41,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 134 [2024-11-17 03:36:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:52,560 INFO L124 PetriNetUnfolderBase]: 118510/156615 cut-off events. [2024-11-17 03:36:52,564 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2024-11-17 03:36:52,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302287 conditions, 156615 events. 118510/156615 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 12291. Compared 1172766 event pairs, 87208 based on Foata normal form. 0/82215 useless extension candidates. Maximal degree in co-relation 302207. Up to 144108 conditions per place. [2024-11-17 03:36:54,023 INFO L140 encePairwiseOnDemand]: 117/134 looper letters, 81 selfloop transitions, 13 changer transitions 0/127 dead transitions. [2024-11-17 03:36:54,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 127 transitions, 456 flow [2024-11-17 03:36:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:36:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:36:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2024-11-17 03:36:54,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962686567164179 [2024-11-17 03:36:54,032 INFO L175 Difference]: Start difference. First operand has 102 places, 115 transitions, 242 flow. Second operand 4 states and 266 transitions. [2024-11-17 03:36:54,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 127 transitions, 456 flow [2024-11-17 03:36:54,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 127 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:54,041 INFO L231 Difference]: Finished difference. Result has 106 places, 127 transitions, 346 flow [2024-11-17 03:36:54,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=106, PETRI_TRANSITIONS=127} [2024-11-17 03:36:54,043 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2024-11-17 03:36:54,046 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 127 transitions, 346 flow [2024-11-17 03:36:54,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 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) [2024-11-17 03:36:54,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:54,047 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:36:54,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:36:54,047 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-17 03:36:54,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2080659696, now seen corresponding path program 1 times [2024-11-17 03:36:54,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:54,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269443081] [2024-11-17 03:36:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:54,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:54,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269443081] [2024-11-17 03:36:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269443081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208000905] [2024-11-17 03:36:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:54,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:54,414 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) [2024-11-17 03:36:54,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:36:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:54,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:36:54,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:54,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:36:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:54,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:54,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208000905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:54,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:54,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:36:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634256697] [2024-11-17 03:36:54,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:54,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:36:54,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:36:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:36:55,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 134 [2024-11-17 03:36:55,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 127 transitions, 346 flow. Second operand has 11 states, 11 states have (on average 39.36363636363637) internal successors, (433), 11 states have internal predecessors, (433), 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) [2024-11-17 03:36:55,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:55,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 134 [2024-11-17 03:36:55,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand