./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.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-more-array-sum2.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 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:38:24,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:38:24,115 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:38:24,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:38:24,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:38:24,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:38:24,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:38:24,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:38:24,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:38:24,156 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:38:24,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:38:24,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:38:24,157 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:38:24,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:38:24,159 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:38:24,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:38:24,160 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:38:24,160 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:38:24,160 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:38:24,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:38:24,161 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:38:24,165 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:38:24,166 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:38:24,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:38:24,166 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:38:24,166 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:38:24,167 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:38:24,167 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:38:24,167 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:38:24,167 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:38:24,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:38:24,168 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:38:24,168 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:38:24,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:24,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:38:24,169 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:38:24,169 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:38:24,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:38:24,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:38:24,170 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:38:24,170 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:38:24,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:38:24,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2024-11-17 03:38:24,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:38:24,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:38:24,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:38:24,435 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:38:24,435 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:38:24,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-17 03:38:25,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:38:26,080 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:38:26,082 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-17 03:38:26,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b5490355/f9eedb6c551f45feb38a52c02cfbec8e/FLAGdd9ddaa53 [2024-11-17 03:38:26,109 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b5490355/f9eedb6c551f45feb38a52c02cfbec8e [2024-11-17 03:38:26,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:38:26,114 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:38:26,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:26,117 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:38:26,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:38:26,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eaf13f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26, skipping insertion in model container [2024-11-17 03:38:26,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,149 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:38:26,388 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 03:38:26,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:26,410 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:38:26,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:26,483 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:38:26,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26 WrapperNode [2024-11-17 03:38:26,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:26,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:26,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:38:26,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:38:26,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,527 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,553 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 261 [2024-11-17 03:38:26,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:26,556 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:38:26,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:38:26,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:38:26,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,571 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,588 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-17 03:38:26,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,609 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,620 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,626 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:38:26,627 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:38:26,627 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:38:26,627 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:38:26,628 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (1/1) ... [2024-11-17 03:38:26,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:26,672 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 03:38:26,675 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 03:38:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:38:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:38:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:38:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:38:26,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:38:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:38:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:38:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:38:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:38:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:38:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:38:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:38:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:38:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:38:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:38:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:38:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:38:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:38:26,729 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 03:38:26,833 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:38:26,834 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:38:27,299 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:38:27,300 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:38:27,656 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:38:27,656 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:38:27,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:27 BoogieIcfgContainer [2024-11-17 03:38:27,658 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:38:27,661 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:38:27,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:38:27,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:38:27,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:38:26" (1/3) ... [2024-11-17 03:38:27,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c774856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:27, skipping insertion in model container [2024-11-17 03:38:27,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:26" (2/3) ... [2024-11-17 03:38:27,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c774856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:27, skipping insertion in model container [2024-11-17 03:38:27,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:27" (3/3) ... [2024-11-17 03:38:27,669 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2024-11-17 03:38:27,687 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:38:27,687 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-17 03:38:27,688 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:38:27,754 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:38:27,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 70 transitions, 161 flow [2024-11-17 03:38:27,833 INFO L124 PetriNetUnfolderBase]: 10/67 cut-off events. [2024-11-17 03:38:27,833 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:38:27,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 10/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 162 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-11-17 03:38:27,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 70 transitions, 161 flow [2024-11-17 03:38:27,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 66 transitions, 150 flow [2024-11-17 03:38:27,850 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:38:27,860 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;@26f989c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:38:27,860 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-17 03:38:27,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:38:27,865 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:38:27,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:38:27,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:27,866 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:27,866 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:27,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 25504038, now seen corresponding path program 1 times [2024-11-17 03:38:27,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:27,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964029210] [2024-11-17 03:38:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:27,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:28,157 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 03:38:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964029210] [2024-11-17 03:38:28,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964029210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:28,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:28,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:38:28,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532811277] [2024-11-17 03:38:28,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:28,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:38:28,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:38:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:38:28,221 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:28,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 03:38:28,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:28,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:28,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:28,954 INFO L124 PetriNetUnfolderBase]: 2971/4663 cut-off events. [2024-11-17 03:38:28,954 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-11-17 03:38:28,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9105 conditions, 4663 events. 2971/4663 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32412 event pairs, 2534 based on Foata normal form. 438/3145 useless extension candidates. Maximal degree in co-relation 8582. Up to 4213 conditions per place. [2024-11-17 03:38:28,992 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 39 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-11-17 03:38:28,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 214 flow [2024-11-17 03:38:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:38:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:38:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-11-17 03:38:29,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-11-17 03:38:29,007 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 150 flow. Second operand 3 states and 109 transitions. [2024-11-17 03:38:29,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 214 flow [2024-11-17 03:38:29,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 202 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:38:29,016 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 124 flow [2024-11-17 03:38:29,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-11-17 03:38:29,024 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2024-11-17 03:38:29,025 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 124 flow [2024-11-17 03:38:29,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 03:38:29,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:29,025 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:29,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:38:29,026 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:29,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash 25504039, now seen corresponding path program 1 times [2024-11-17 03:38:29,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:29,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779123358] [2024-11-17 03:38:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:29,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:29,325 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 03:38:29,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779123358] [2024-11-17 03:38:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779123358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:38:29,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082378865] [2024-11-17 03:38:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:29,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:29,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:29,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:29,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 03:38:29,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:29,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:29,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:29,881 INFO L124 PetriNetUnfolderBase]: 2972/4668 cut-off events. [2024-11-17 03:38:29,881 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-17 03:38:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8969 conditions, 4668 events. 2972/4668 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32546 event pairs, 2534 based on Foata normal form. 0/2710 useless extension candidates. Maximal degree in co-relation 8934. Up to 4222 conditions per place. [2024-11-17 03:38:29,907 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 42 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-17 03:38:29,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 222 flow [2024-11-17 03:38:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-17 03:38:29,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-11-17 03:38:29,912 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 124 flow. Second operand 4 states and 127 transitions. [2024-11-17 03:38:29,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 222 flow [2024-11-17 03:38:29,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:29,916 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 147 flow [2024-11-17 03:38:29,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-17 03:38:29,917 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2024-11-17 03:38:29,917 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 147 flow [2024-11-17 03:38:29,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 03:38:29,918 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:29,918 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:38:29,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:38:29,919 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:29,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash -417578243, now seen corresponding path program 1 times [2024-11-17 03:38:29,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:29,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614483798] [2024-11-17 03:38:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:29,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:30,311 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 03:38:30,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:30,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614483798] [2024-11-17 03:38:30,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614483798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:30,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758849676] [2024-11-17 03:38:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:30,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:30,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:30,316 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 03:38:30,318 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 03:38:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:30,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:38:30,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:30,464 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 [2024-11-17 03:38:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:30,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:30,799 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 03:38:30,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758849676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:30,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:30,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:38:30,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581594835] [2024-11-17 03:38:30,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:30,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:38:30,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:30,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:38:30,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:38:30,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:38:30,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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 03:38:30,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:30,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:38:30,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:31,537 INFO L124 PetriNetUnfolderBase]: 2972/4667 cut-off events. [2024-11-17 03:38:31,537 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-17 03:38:31,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8980 conditions, 4667 events. 2972/4667 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32411 event pairs, 2534 based on Foata normal form. 0/2709 useless extension candidates. Maximal degree in co-relation 8955. Up to 4218 conditions per place. [2024-11-17 03:38:31,566 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 39 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-11-17 03:38:31,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 241 flow [2024-11-17 03:38:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-11-17 03:38:31,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-17 03:38:31,569 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 147 flow. Second operand 7 states and 175 transitions. [2024-11-17 03:38:31,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 241 flow [2024-11-17 03:38:31,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:38:31,571 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 158 flow [2024-11-17 03:38:31,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-17 03:38:31,572 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-17 03:38:31,573 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 158 flow [2024-11-17 03:38:31,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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 03:38:31,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:31,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:31,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:38:31,777 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 [2024-11-17 03:38:31,778 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:31,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -418575901, now seen corresponding path program 1 times [2024-11-17 03:38:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225092582] [2024-11-17 03:38:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:31,862 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 03:38:31,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:31,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225092582] [2024-11-17 03:38:31,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225092582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:31,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:31,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:38:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849265739] [2024-11-17 03:38:31,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:31,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:31,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:31,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:31,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 03:38:31,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:31,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:31,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:32,483 INFO L124 PetriNetUnfolderBase]: 2972/4674 cut-off events. [2024-11-17 03:38:32,483 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-17 03:38:32,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8999 conditions, 4674 events. 2972/4674 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32491 event pairs, 2534 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 8966. Up to 4221 conditions per place. [2024-11-17 03:38:32,517 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 43 selfloop transitions, 4 changer transitions 4/64 dead transitions. [2024-11-17 03:38:32,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 274 flow [2024-11-17 03:38:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-17 03:38:32,519 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-17 03:38:32,519 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 158 flow. Second operand 4 states and 133 transitions. [2024-11-17 03:38:32,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 274 flow [2024-11-17 03:38:32,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 243 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-17 03:38:32,524 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 152 flow [2024-11-17 03:38:32,525 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-11-17 03:38:32,526 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2024-11-17 03:38:32,527 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 152 flow [2024-11-17 03:38:32,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 03:38:32,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:32,527 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:32,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:38:32,528 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:32,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1848338355, now seen corresponding path program 1 times [2024-11-17 03:38:32,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:32,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138104897] [2024-11-17 03:38:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:32,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:32,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138104897] [2024-11-17 03:38:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138104897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137833282] [2024-11-17 03:38:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:32,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:32,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:32,749 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) [2024-11-17 03:38:32,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:38:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:32,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:38:32,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:32,843 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 [2024-11-17 03:38:33,006 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:38:33,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-17 03:38:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:33,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:33,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137833282] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:33,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:38:33,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-17 03:38:33,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345451174] [2024-11-17 03:38:33,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:33,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:33,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:38:33,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:33,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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 03:38:33,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:33,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:33,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:33,842 INFO L124 PetriNetUnfolderBase]: 2971/4668 cut-off events. [2024-11-17 03:38:33,842 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2024-11-17 03:38:33,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8984 conditions, 4668 events. 2971/4668 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32538 event pairs, 2534 based on Foata normal form. 1/2713 useless extension candidates. Maximal degree in co-relation 8948. Up to 4219 conditions per place. [2024-11-17 03:38:33,867 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 42 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-17 03:38:33,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 248 flow [2024-11-17 03:38:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-17 03:38:33,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-11-17 03:38:33,870 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 152 flow. Second operand 5 states and 147 transitions. [2024-11-17 03:38:33,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 248 flow [2024-11-17 03:38:33,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 238 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:33,872 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 156 flow [2024-11-17 03:38:33,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-17 03:38:33,873 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-17 03:38:33,874 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 156 flow [2024-11-17 03:38:33,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 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 03:38:33,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:33,874 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:33,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:34,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:34,079 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:34,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1928590747, now seen corresponding path program 1 times [2024-11-17 03:38:34,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:34,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029562015] [2024-11-17 03:38:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:34,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:34,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:34,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029562015] [2024-11-17 03:38:34,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029562015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545986814] [2024-11-17 03:38:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:34,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:34,212 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) [2024-11-17 03:38:34,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:38:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:34,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:38:34,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:34,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:34,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545986814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:34,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:34,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:38:34,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069728090] [2024-11-17 03:38:34,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:34,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:38:34,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:38:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:34,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:34,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 21.642857142857142) internal successors, (303), 14 states have internal predecessors, (303), 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 03:38:34,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:34,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:34,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:35,593 INFO L124 PetriNetUnfolderBase]: 5941/9335 cut-off events. [2024-11-17 03:38:35,593 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-11-17 03:38:35,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17960 conditions, 9335 events. 5941/9335 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 69303 event pairs, 5068 based on Foata normal form. 1/5460 useless extension candidates. Maximal degree in co-relation 8960. Up to 4217 conditions per place. [2024-11-17 03:38:35,642 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 74 selfloop transitions, 19 changer transitions 0/106 dead transitions. [2024-11-17 03:38:35,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 463 flow [2024-11-17 03:38:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:38:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:38:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2024-11-17 03:38:35,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-11-17 03:38:35,644 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 156 flow. Second operand 10 states and 294 transitions. [2024-11-17 03:38:35,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 463 flow [2024-11-17 03:38:35,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 106 transitions, 449 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:38:35,647 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 243 flow [2024-11-17 03:38:35,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=243, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-11-17 03:38:35,648 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2024-11-17 03:38:35,648 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 243 flow [2024-11-17 03:38:35,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.642857142857142) internal successors, (303), 14 states have internal predecessors, (303), 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 03:38:35,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:35,649 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:38:35,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:38:35,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:35,850 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:35,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1219333253, now seen corresponding path program 2 times [2024-11-17 03:38:35,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:35,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437978525] [2024-11-17 03:38:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:35,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:36,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:36,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437978525] [2024-11-17 03:38:36,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437978525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:36,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38801794] [2024-11-17 03:38:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:38:36,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:36,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:36,206 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) [2024-11-17 03:38:36,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:38:36,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:38:36,280 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:36,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-17 03:38:36,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:36,294 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 [2024-11-17 03:38:36,450 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:38:36,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-17 03:38:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:36,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:36,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38801794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:36,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:36,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-17 03:38:36,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795281772] [2024-11-17 03:38:36,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:36,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:38:36,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:38:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:38:37,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:38:37,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 243 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 03:38:37,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:37,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:38:37,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:39,291 INFO L124 PetriNetUnfolderBase]: 8911/14004 cut-off events. [2024-11-17 03:38:39,291 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2024-11-17 03:38:39,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26987 conditions, 14004 events. 8911/14004 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 106589 event pairs, 7602 based on Foata normal form. 4/8212 useless extension candidates. Maximal degree in co-relation 8975. Up to 4221 conditions per place. [2024-11-17 03:38:39,378 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 123 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-11-17 03:38:39,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 155 transitions, 783 flow [2024-11-17 03:38:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:38:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:38:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 399 transitions. [2024-11-17 03:38:39,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-11-17 03:38:39,380 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 243 flow. Second operand 14 states and 399 transitions. [2024-11-17 03:38:39,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 155 transitions, 783 flow [2024-11-17 03:38:39,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 155 transitions, 751 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-17 03:38:39,385 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 342 flow [2024-11-17 03:38:39,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=342, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2024-11-17 03:38:39,386 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 22 predicate places. [2024-11-17 03:38:39,387 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 342 flow [2024-11-17 03:38:39,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 03:38:39,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:39,388 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:39,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:38:39,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:39,589 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:39,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash -792002998, now seen corresponding path program 1 times [2024-11-17 03:38:39,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:39,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696511426] [2024-11-17 03:38:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:39,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:39,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:39,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696511426] [2024-11-17 03:38:39,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696511426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:39,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:39,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:39,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220870719] [2024-11-17 03:38:39,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:39,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:39,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:39,714 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:39,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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 03:38:39,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:39,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:39,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:40,507 INFO L124 PetriNetUnfolderBase]: 6097/9744 cut-off events. [2024-11-17 03:38:40,508 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-11-17 03:38:40,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18728 conditions, 9744 events. 6097/9744 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 71052 event pairs, 5076 based on Foata normal form. 0/6165 useless extension candidates. Maximal degree in co-relation 12497. Up to 8664 conditions per place. [2024-11-17 03:38:40,572 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 49 selfloop transitions, 7 changer transitions 0/75 dead transitions. [2024-11-17 03:38:40,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 448 flow [2024-11-17 03:38:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-17 03:38:40,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40285714285714286 [2024-11-17 03:38:40,574 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 342 flow. Second operand 5 states and 141 transitions. [2024-11-17 03:38:40,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 448 flow [2024-11-17 03:38:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 75 transitions, 428 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 03:38:40,577 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 330 flow [2024-11-17 03:38:40,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-11-17 03:38:40,578 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2024-11-17 03:38:40,578 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 330 flow [2024-11-17 03:38:40,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 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 03:38:40,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:40,578 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:40,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:38:40,579 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:40,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash -792002997, now seen corresponding path program 1 times [2024-11-17 03:38:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:40,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986298385] [2024-11-17 03:38:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:40,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986298385] [2024-11-17 03:38:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986298385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:40,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105548203] [2024-11-17 03:38:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:40,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:40,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:40,734 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) [2024-11-17 03:38:40,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:38:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:40,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-17 03:38:40,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:40,827 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 [2024-11-17 03:38:40,834 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 6 treesize of output 5 [2024-11-17 03:38:40,895 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:38:40,896 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 11 treesize of output 11 [2024-11-17 03:38:40,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-17 03:38:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:41,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:41,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105548203] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:41,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:38:41,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 11 [2024-11-17 03:38:41,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69551920] [2024-11-17 03:38:41,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:41,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:38:41,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:38:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:38:41,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2024-11-17 03:38:41,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:41,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:41,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2024-11-17 03:38:41,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:42,494 INFO L124 PetriNetUnfolderBase]: 7948/12351 cut-off events. [2024-11-17 03:38:42,494 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-17 03:38:42,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23549 conditions, 12351 events. 7948/12351 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 83050 event pairs, 2796 based on Foata normal form. 0/7698 useless extension candidates. Maximal degree in co-relation 15709. Up to 5694 conditions per place. [2024-11-17 03:38:42,657 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 64 selfloop transitions, 16 changer transitions 0/99 dead transitions. [2024-11-17 03:38:42,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 99 transitions, 544 flow [2024-11-17 03:38:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-17 03:38:42,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4448979591836735 [2024-11-17 03:38:42,660 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 330 flow. Second operand 7 states and 218 transitions. [2024-11-17 03:38:42,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 99 transitions, 544 flow [2024-11-17 03:38:42,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:42,667 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 384 flow [2024-11-17 03:38:42,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-11-17 03:38:42,669 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2024-11-17 03:38:42,669 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 384 flow [2024-11-17 03:38:42,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:42,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:42,669 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:42,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:38:42,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:42,871 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:42,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash -792002996, now seen corresponding path program 1 times [2024-11-17 03:38:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:42,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072432681] [2024-11-17 03:38:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:42,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:42,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:42,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072432681] [2024-11-17 03:38:42,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072432681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:42,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:42,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:42,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052721621] [2024-11-17 03:38:42,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:42,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:42,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:42,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:42,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 03:38:42,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:42,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:42,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:43,719 INFO L124 PetriNetUnfolderBase]: 5083/8496 cut-off events. [2024-11-17 03:38:43,719 INFO L125 PetriNetUnfolderBase]: For 4048/4048 co-relation queries the response was YES. [2024-11-17 03:38:43,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19432 conditions, 8496 events. 5083/8496 cut-off events. For 4048/4048 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 61342 event pairs, 3720 based on Foata normal form. 0/6102 useless extension candidates. Maximal degree in co-relation 12963. Up to 7020 conditions per place. [2024-11-17 03:38:43,776 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 52 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-11-17 03:38:43,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 75 transitions, 482 flow [2024-11-17 03:38:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-17 03:38:43,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-11-17 03:38:43,778 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 384 flow. Second operand 4 states and 118 transitions. [2024-11-17 03:38:43,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 75 transitions, 482 flow [2024-11-17 03:38:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:38:43,784 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 361 flow [2024-11-17 03:38:43,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-17 03:38:43,786 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 20 predicate places. [2024-11-17 03:38:43,786 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 361 flow [2024-11-17 03:38:43,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 03:38:43,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:43,787 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:43,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:38:43,787 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:43,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash -792002995, now seen corresponding path program 1 times [2024-11-17 03:38:43,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:43,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959870105] [2024-11-17 03:38:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959870105] [2024-11-17 03:38:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959870105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713598617] [2024-11-17 03:38:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:44,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:44,004 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) [2024-11-17 03:38:44,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:38:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:44,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:38:44,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:44,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:44,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:38:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:44,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713598617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:44,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:44,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-17 03:38:44,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285487343] [2024-11-17 03:38:44,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:44,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:38:44,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:38:44,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:38:44,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2024-11-17 03:38:44,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 361 flow. Second operand has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 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 03:38:44,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:44,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2024-11-17 03:38:44,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:45,205 INFO L124 PetriNetUnfolderBase]: 5443/8970 cut-off events. [2024-11-17 03:38:45,205 INFO L125 PetriNetUnfolderBase]: For 3852/3852 co-relation queries the response was YES. [2024-11-17 03:38:45,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20800 conditions, 8970 events. 5443/8970 cut-off events. For 3852/3852 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 63113 event pairs, 1644 based on Foata normal form. 0/6765 useless extension candidates. Maximal degree in co-relation 13874. Up to 5010 conditions per place. [2024-11-17 03:38:45,270 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 75 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-11-17 03:38:45,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 623 flow [2024-11-17 03:38:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 231 transitions. [2024-11-17 03:38:45,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-17 03:38:45,272 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 361 flow. Second operand 7 states and 231 transitions. [2024-11-17 03:38:45,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 623 flow [2024-11-17 03:38:45,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 618 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:45,279 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 390 flow [2024-11-17 03:38:45,279 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2024-11-17 03:38:45,280 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2024-11-17 03:38:45,280 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 390 flow [2024-11-17 03:38:45,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 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 03:38:45,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:45,281 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-17 03:38:45,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:45,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:45,485 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:45,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1675626909, now seen corresponding path program 3 times [2024-11-17 03:38:45,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:45,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479336420] [2024-11-17 03:38:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479336420] [2024-11-17 03:38:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479336420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905197283] [2024-11-17 03:38:45,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:38:45,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:45,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:45,631 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) [2024-11-17 03:38:45,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:38:45,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:38:45,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:45,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:38:45,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:45,723 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 [2024-11-17 03:38:45,853 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:38:45,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-17 03:38:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:38:45,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:38:46,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905197283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:46,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:46,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-17 03:38:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299062198] [2024-11-17 03:38:46,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:46,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:38:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:38:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:38:46,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:38:46,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 390 flow. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 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 03:38:46,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:46,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:38:46,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:47,973 INFO L124 PetriNetUnfolderBase]: 5442/8929 cut-off events. [2024-11-17 03:38:47,973 INFO L125 PetriNetUnfolderBase]: For 8290/8290 co-relation queries the response was YES. [2024-11-17 03:38:47,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22049 conditions, 8929 events. 5442/8929 cut-off events. For 8290/8290 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 64428 event pairs, 4260 based on Foata normal form. 3/6974 useless extension candidates. Maximal degree in co-relation 14735. Up to 5092 conditions per place. [2024-11-17 03:38:48,011 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 67 selfloop transitions, 31 changer transitions 0/110 dead transitions. [2024-11-17 03:38:48,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 714 flow [2024-11-17 03:38:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 03:38:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-17 03:38:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 437 transitions. [2024-11-17 03:38:48,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2024-11-17 03:38:48,014 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 390 flow. Second operand 19 states and 437 transitions. [2024-11-17 03:38:48,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 714 flow [2024-11-17 03:38:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 110 transitions, 660 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:38:48,020 INFO L231 Difference]: Finished difference. Result has 101 places, 77 transitions, 438 flow [2024-11-17 03:38:48,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=438, PETRI_PLACES=101, PETRI_TRANSITIONS=77} [2024-11-17 03:38:48,023 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 35 predicate places. [2024-11-17 03:38:48,023 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 77 transitions, 438 flow [2024-11-17 03:38:48,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 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 03:38:48,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:48,024 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:48,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:38:48,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:48,228 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:48,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1326523740, now seen corresponding path program 1 times [2024-11-17 03:38:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:48,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380846897] [2024-11-17 03:38:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:48,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380846897] [2024-11-17 03:38:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380846897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848669501] [2024-11-17 03:38:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:48,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:48,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:48,340 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) [2024-11-17 03:38:48,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:38:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:48,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:48,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:48,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:48,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848669501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:48,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:48,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:38:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337313844] [2024-11-17 03:38:48,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:48,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:38:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:38:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:48,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:38:48,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 77 transitions, 438 flow. Second operand has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 14 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:48,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:48,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:38:48,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:49,385 INFO L124 PetriNetUnfolderBase]: 5920/9159 cut-off events. [2024-11-17 03:38:49,385 INFO L125 PetriNetUnfolderBase]: For 5200/5200 co-relation queries the response was YES. [2024-11-17 03:38:49,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21883 conditions, 9159 events. 5920/9159 cut-off events. For 5200/5200 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 60360 event pairs, 3754 based on Foata normal form. 0/6935 useless extension candidates. Maximal degree in co-relation 8737. Up to 5937 conditions per place. [2024-11-17 03:38:49,424 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 109 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-11-17 03:38:49,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 945 flow [2024-11-17 03:38:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:38:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:38:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-11-17 03:38:49,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4157142857142857 [2024-11-17 03:38:49,426 INFO L175 Difference]: Start difference. First operand has 101 places, 77 transitions, 438 flow. Second operand 10 states and 291 transitions. [2024-11-17 03:38:49,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 945 flow [2024-11-17 03:38:49,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 872 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-11-17 03:38:49,432 INFO L231 Difference]: Finished difference. Result has 100 places, 80 transitions, 448 flow [2024-11-17 03:38:49,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2024-11-17 03:38:49,432 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2024-11-17 03:38:49,433 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 448 flow [2024-11-17 03:38:49,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 14 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:49,433 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:49,433 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:49,634 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,SelfDestructingSolverStorable12 [2024-11-17 03:38:49,634 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:49,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash -677089740, now seen corresponding path program 1 times [2024-11-17 03:38:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:49,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178113846] [2024-11-17 03:38:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:49,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178113846] [2024-11-17 03:38:49,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178113846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:49,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:49,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:38:49,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423827072] [2024-11-17 03:38:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:49,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:38:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:38:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:38:50,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:38:50,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 448 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 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 03:38:50,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:50,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:38:50,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:50,904 INFO L124 PetriNetUnfolderBase]: 5592/9317 cut-off events. [2024-11-17 03:38:50,904 INFO L125 PetriNetUnfolderBase]: For 5745/5745 co-relation queries the response was YES. [2024-11-17 03:38:50,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 9317 events. 5592/9317 cut-off events. For 5745/5745 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 65984 event pairs, 2397 based on Foata normal form. 0/7222 useless extension candidates. Maximal degree in co-relation 10318. Up to 4464 conditions per place. [2024-11-17 03:38:50,951 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 78 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-11-17 03:38:50,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 103 transitions, 718 flow [2024-11-17 03:38:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:38:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:38:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-11-17 03:38:50,953 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-11-17 03:38:50,953 INFO L175 Difference]: Start difference. First operand has 100 places, 80 transitions, 448 flow. Second operand 6 states and 164 transitions. [2024-11-17 03:38:50,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 103 transitions, 718 flow [2024-11-17 03:38:50,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 691 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:38:50,960 INFO L231 Difference]: Finished difference. Result has 102 places, 83 transitions, 472 flow [2024-11-17 03:38:50,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=102, PETRI_TRANSITIONS=83} [2024-11-17 03:38:50,960 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 36 predicate places. [2024-11-17 03:38:50,960 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 83 transitions, 472 flow [2024-11-17 03:38:50,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 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 03:38:50,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:50,961 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:50,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:38:50,961 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:50,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -677089738, now seen corresponding path program 1 times [2024-11-17 03:38:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643218767] [2024-11-17 03:38:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:51,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643218767] [2024-11-17 03:38:51,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643218767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:51,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769958390] [2024-11-17 03:38:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:51,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:51,232 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) [2024-11-17 03:38:51,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:38:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:51,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:38:51,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:51,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:51,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-17 03:38:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:51,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769958390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:51,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:51,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-17 03:38:51,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217984773] [2024-11-17 03:38:51,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:51,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:38:51,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:38:51,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:38:52,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-11-17 03:38:52,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 83 transitions, 472 flow. Second operand has 21 states, 21 states have (on average 21.285714285714285) internal successors, (447), 21 states have internal predecessors, (447), 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 03:38:52,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:52,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-11-17 03:38:52,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:53,461 INFO L124 PetriNetUnfolderBase]: 7012/10612 cut-off events. [2024-11-17 03:38:53,461 INFO L125 PetriNetUnfolderBase]: For 10687/10687 co-relation queries the response was YES. [2024-11-17 03:38:53,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30325 conditions, 10612 events. 7012/10612 cut-off events. For 10687/10687 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 71347 event pairs, 4397 based on Foata normal form. 0/8590 useless extension candidates. Maximal degree in co-relation 13458. Up to 6778 conditions per place. [2024-11-17 03:38:53,538 INFO L140 encePairwiseOnDemand]: 56/70 looper letters, 147 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2024-11-17 03:38:53,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 190 transitions, 1308 flow [2024-11-17 03:38:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 03:38:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-17 03:38:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 504 transitions. [2024-11-17 03:38:53,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2024-11-17 03:38:53,541 INFO L175 Difference]: Start difference. First operand has 102 places, 83 transitions, 472 flow. Second operand 19 states and 504 transitions. [2024-11-17 03:38:53,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 190 transitions, 1308 flow [2024-11-17 03:38:53,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 1297 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:38:53,559 INFO L231 Difference]: Finished difference. Result has 122 places, 91 transitions, 603 flow [2024-11-17 03:38:53,560 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=603, PETRI_PLACES=122, PETRI_TRANSITIONS=91} [2024-11-17 03:38:53,560 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 56 predicate places. [2024-11-17 03:38:53,560 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 91 transitions, 603 flow [2024-11-17 03:38:53,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.285714285714285) internal successors, (447), 21 states have internal predecessors, (447), 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 03:38:53,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:53,561 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:53,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:38:53,761 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,SelfDestructingSolverStorable14 [2024-11-17 03:38:53,762 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:53,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1558781543, now seen corresponding path program 1 times [2024-11-17 03:38:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272468488] [2024-11-17 03:38:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:53,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:53,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272468488] [2024-11-17 03:38:53,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272468488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:53,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674435487] [2024-11-17 03:38:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:53,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:53,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:53,910 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) [2024-11-17 03:38:53,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:38:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:54,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:38:54,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:54,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:38:54,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674435487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:54,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:54,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:38:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091204494] [2024-11-17 03:38:54,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:54,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:38:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:38:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:38:54,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:38:54,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 91 transitions, 603 flow. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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 03:38:54,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:54,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:38:54,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:55,216 INFO L124 PetriNetUnfolderBase]: 7738/12034 cut-off events. [2024-11-17 03:38:55,216 INFO L125 PetriNetUnfolderBase]: For 18521/18661 co-relation queries the response was YES. [2024-11-17 03:38:55,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36239 conditions, 12034 events. 7738/12034 cut-off events. For 18521/18661 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 82001 event pairs, 4414 based on Foata normal form. 66/10181 useless extension candidates. Maximal degree in co-relation 32046. Up to 7685 conditions per place. [2024-11-17 03:38:55,303 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 139 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-11-17 03:38:55,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 180 transitions, 1374 flow [2024-11-17 03:38:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:38:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:38:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 352 transitions. [2024-11-17 03:38:55,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-11-17 03:38:55,305 INFO L175 Difference]: Start difference. First operand has 122 places, 91 transitions, 603 flow. Second operand 12 states and 352 transitions. [2024-11-17 03:38:55,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 180 transitions, 1374 flow [2024-11-17 03:38:55,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 180 transitions, 1344 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-17 03:38:55,371 INFO L231 Difference]: Finished difference. Result has 129 places, 97 transitions, 674 flow [2024-11-17 03:38:55,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=674, PETRI_PLACES=129, PETRI_TRANSITIONS=97} [2024-11-17 03:38:55,372 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 63 predicate places. [2024-11-17 03:38:55,373 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 97 transitions, 674 flow [2024-11-17 03:38:55,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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 03:38:55,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:55,373 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:55,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:55,573 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,SelfDestructingSolverStorable15 [2024-11-17 03:38:55,574 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:55,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1177413852, now seen corresponding path program 2 times [2024-11-17 03:38:55,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:55,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069965681] [2024-11-17 03:38:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:55,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:38:55,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:55,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069965681] [2024-11-17 03:38:55,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069965681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:55,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743460839] [2024-11-17 03:38:55,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:38:55,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:55,810 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) [2024-11-17 03:38:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:38:55,907 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:38:55,908 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:38:55,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-17 03:38:55,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:55,928 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 6 treesize of output 5 [2024-11-17 03:38:55,938 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 [2024-11-17 03:38:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:38:56,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:38:56,074 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:38:56,075 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 11 treesize of output 11 [2024-11-17 03:38:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-17 03:38:56,287 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:38:56,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743460839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:56,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:38:56,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2024-11-17 03:38:56,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667424551] [2024-11-17 03:38:56,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:56,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:38:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:56,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:38:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:38:56,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-11-17 03:38:56,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 97 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 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 03:38:56,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:56,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-11-17 03:38:56,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:57,559 INFO L124 PetriNetUnfolderBase]: 9301/14454 cut-off events. [2024-11-17 03:38:57,559 INFO L125 PetriNetUnfolderBase]: For 30032/30282 co-relation queries the response was YES. [2024-11-17 03:38:57,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46802 conditions, 14454 events. 9301/14454 cut-off events. For 30032/30282 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 98791 event pairs, 3413 based on Foata normal form. 6/12280 useless extension candidates. Maximal degree in co-relation 41245. Up to 8211 conditions per place. [2024-11-17 03:38:57,681 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 121 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-11-17 03:38:57,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 156 transitions, 1299 flow [2024-11-17 03:38:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-11-17 03:38:57,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42244897959183675 [2024-11-17 03:38:57,683 INFO L175 Difference]: Start difference. First operand has 129 places, 97 transitions, 674 flow. Second operand 7 states and 207 transitions. [2024-11-17 03:38:57,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 156 transitions, 1299 flow [2024-11-17 03:38:57,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 156 transitions, 1268 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-17 03:38:57,713 INFO L231 Difference]: Finished difference. Result has 132 places, 100 transitions, 697 flow [2024-11-17 03:38:57,713 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=697, PETRI_PLACES=132, PETRI_TRANSITIONS=100} [2024-11-17 03:38:57,714 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 66 predicate places. [2024-11-17 03:38:57,714 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 100 transitions, 697 flow [2024-11-17 03:38:57,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 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 03:38:57,714 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:57,714 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:57,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:57,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 03:38:57,915 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:38:57,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1177413854, now seen corresponding path program 1 times [2024-11-17 03:38:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:57,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260408949] [2024-11-17 03:38:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:38:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260408949] [2024-11-17 03:38:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260408949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672027777] [2024-11-17 03:38:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:58,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:58,181 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) [2024-11-17 03:38:58,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:38:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:58,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:38:58,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:38:58,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:58,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:38:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:38:58,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672027777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:58,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:58,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2024-11-17 03:38:58,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350218126] [2024-11-17 03:38:58,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:58,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:38:58,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:38:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:38:58,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:38:58,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 100 transitions, 697 flow. Second operand has 20 states, 20 states have (on average 22.2) internal successors, (444), 20 states have internal predecessors, (444), 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 03:38:58,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:58,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:38:58,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:00,413 INFO L124 PetriNetUnfolderBase]: 8819/14661 cut-off events. [2024-11-17 03:39:00,413 INFO L125 PetriNetUnfolderBase]: For 32640/33308 co-relation queries the response was YES. [2024-11-17 03:39:00,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48996 conditions, 14661 events. 8819/14661 cut-off events. For 32640/33308 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 107900 event pairs, 2694 based on Foata normal form. 346/13783 useless extension candidates. Maximal degree in co-relation 43222. Up to 5488 conditions per place. [2024-11-17 03:39:00,544 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 140 selfloop transitions, 23 changer transitions 0/180 dead transitions. [2024-11-17 03:39:00,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 180 transitions, 1450 flow [2024-11-17 03:39:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:39:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:39:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 407 transitions. [2024-11-17 03:39:00,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4153061224489796 [2024-11-17 03:39:00,545 INFO L175 Difference]: Start difference. First operand has 132 places, 100 transitions, 697 flow. Second operand 14 states and 407 transitions. [2024-11-17 03:39:00,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 180 transitions, 1450 flow [2024-11-17 03:39:00,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 180 transitions, 1429 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:00,600 INFO L231 Difference]: Finished difference. Result has 144 places, 102 transitions, 753 flow [2024-11-17 03:39:00,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=753, PETRI_PLACES=144, PETRI_TRANSITIONS=102} [2024-11-17 03:39:00,601 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 78 predicate places. [2024-11-17 03:39:00,601 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 102 transitions, 753 flow [2024-11-17 03:39:00,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.2) internal successors, (444), 20 states have internal predecessors, (444), 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 03:39:00,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:00,602 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:00,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:39:00,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:39:00,806 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:00,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2018621392, now seen corresponding path program 1 times [2024-11-17 03:39:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:00,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769939053] [2024-11-17 03:39:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:00,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:00,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:00,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769939053] [2024-11-17 03:39:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769939053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:00,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059083831] [2024-11-17 03:39:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:00,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:00,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:00,923 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:00,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:39:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:01,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:39:01,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:01,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:01,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059083831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:01,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:01,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:39:01,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845809886] [2024-11-17 03:39:01,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:01,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:39:01,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:39:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:39:01,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:39:01,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 102 transitions, 753 flow. Second operand has 15 states, 15 states have (on average 20.6) internal successors, (309), 15 states have internal predecessors, (309), 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 03:39:01,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:01,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:39:01,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:03,090 INFO L124 PetriNetUnfolderBase]: 12585/19061 cut-off events. [2024-11-17 03:39:03,090 INFO L125 PetriNetUnfolderBase]: For 52572/53600 co-relation queries the response was YES. [2024-11-17 03:39:03,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69149 conditions, 19061 events. 12585/19061 cut-off events. For 52572/53600 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 130621 event pairs, 7382 based on Foata normal form. 790/18905 useless extension candidates. Maximal degree in co-relation 62406. Up to 13465 conditions per place. [2024-11-17 03:39:03,227 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 113 selfloop transitions, 29 changer transitions 0/156 dead transitions. [2024-11-17 03:39:03,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 156 transitions, 1333 flow [2024-11-17 03:39:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:39:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:39:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-11-17 03:39:03,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-17 03:39:03,229 INFO L175 Difference]: Start difference. First operand has 144 places, 102 transitions, 753 flow. Second operand 11 states and 308 transitions. [2024-11-17 03:39:03,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 156 transitions, 1333 flow [2024-11-17 03:39:03,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 156 transitions, 1286 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-11-17 03:39:03,291 INFO L231 Difference]: Finished difference. Result has 145 places, 102 transitions, 793 flow [2024-11-17 03:39:03,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=793, PETRI_PLACES=145, PETRI_TRANSITIONS=102} [2024-11-17 03:39:03,292 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 79 predicate places. [2024-11-17 03:39:03,293 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 102 transitions, 793 flow [2024-11-17 03:39:03,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.6) internal successors, (309), 15 states have internal predecessors, (309), 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 03:39:03,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:03,293 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:03,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:03,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:03,494 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:03,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:03,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1633845601, now seen corresponding path program 2 times [2024-11-17 03:39:03,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:03,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775596377] [2024-11-17 03:39:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:03,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:03,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:03,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775596377] [2024-11-17 03:39:03,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775596377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:03,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44182005] [2024-11-17 03:39:03,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:03,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:03,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:03,703 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:03,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:39:03,794 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:03,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:03,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:39:03,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:03,804 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 6 treesize of output 5 [2024-11-17 03:39:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:39:03,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:39:03,867 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:39:03,868 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 11 treesize of output 11 [2024-11-17 03:39:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:03,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:04,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:39:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:04,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44182005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:04,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:04,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-17 03:39:04,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458292125] [2024-11-17 03:39:04,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:04,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:39:04,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:04,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:39:04,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:39:04,544 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:39:04,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 102 transitions, 793 flow. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 03:39:04,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:04,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:39:04,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:07,035 INFO L124 PetriNetUnfolderBase]: 11680/18952 cut-off events. [2024-11-17 03:39:07,035 INFO L125 PetriNetUnfolderBase]: For 57165/58681 co-relation queries the response was YES. [2024-11-17 03:39:07,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69023 conditions, 18952 events. 11680/18952 cut-off events. For 57165/58681 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 141316 event pairs, 3109 based on Foata normal form. 1007/18921 useless extension candidates. Maximal degree in co-relation 60085. Up to 6184 conditions per place. [2024-11-17 03:39:07,203 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 152 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-11-17 03:39:07,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 201 transitions, 1736 flow [2024-11-17 03:39:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:39:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:39:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 397 transitions. [2024-11-17 03:39:07,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43626373626373627 [2024-11-17 03:39:07,205 INFO L175 Difference]: Start difference. First operand has 145 places, 102 transitions, 793 flow. Second operand 13 states and 397 transitions. [2024-11-17 03:39:07,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 201 transitions, 1736 flow [2024-11-17 03:39:07,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 201 transitions, 1693 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-17 03:39:07,305 INFO L231 Difference]: Finished difference. Result has 153 places, 107 transitions, 860 flow [2024-11-17 03:39:07,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=860, PETRI_PLACES=153, PETRI_TRANSITIONS=107} [2024-11-17 03:39:07,306 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 87 predicate places. [2024-11-17 03:39:07,306 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 107 transitions, 860 flow [2024-11-17 03:39:07,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 03:39:07,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:07,307 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:07,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 03:39:07,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:07,508 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:07,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1633845599, now seen corresponding path program 1 times [2024-11-17 03:39:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:07,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158417984] [2024-11-17 03:39:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:07,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:39:07,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:07,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158417984] [2024-11-17 03:39:07,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158417984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:07,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096036279] [2024-11-17 03:39:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:07,902 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:07,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:39:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:07,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:39:07,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:08,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:08,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:39:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:08,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096036279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:08,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:08,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2024-11-17 03:39:08,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085136876] [2024-11-17 03:39:08,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:08,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 03:39:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 03:39:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-11-17 03:39:08,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-11-17 03:39:08,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 107 transitions, 860 flow. Second operand has 24 states, 24 states have (on average 21.125) internal successors, (507), 24 states have internal predecessors, (507), 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 03:39:08,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:08,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-11-17 03:39:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:11,939 INFO L124 PetriNetUnfolderBase]: 13620/21145 cut-off events. [2024-11-17 03:39:11,940 INFO L125 PetriNetUnfolderBase]: For 73854/75324 co-relation queries the response was YES. [2024-11-17 03:39:12,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83424 conditions, 21145 events. 13620/21145 cut-off events. For 73854/75324 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 149341 event pairs, 4101 based on Foata normal form. 781/20346 useless extension candidates. Maximal degree in co-relation 58760. Up to 8688 conditions per place. [2024-11-17 03:39:12,104 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 162 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-11-17 03:39:12,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 203 transitions, 1792 flow [2024-11-17 03:39:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:39:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:39:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 410 transitions. [2024-11-17 03:39:12,106 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-11-17 03:39:12,106 INFO L175 Difference]: Start difference. First operand has 153 places, 107 transitions, 860 flow. Second operand 14 states and 410 transitions. [2024-11-17 03:39:12,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 203 transitions, 1792 flow [2024-11-17 03:39:12,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 203 transitions, 1751 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-17 03:39:12,177 INFO L231 Difference]: Finished difference. Result has 157 places, 106 transitions, 860 flow [2024-11-17 03:39:12,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=860, PETRI_PLACES=157, PETRI_TRANSITIONS=106} [2024-11-17 03:39:12,178 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 91 predicate places. [2024-11-17 03:39:12,178 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 106 transitions, 860 flow [2024-11-17 03:39:12,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 21.125) internal successors, (507), 24 states have internal predecessors, (507), 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 03:39:12,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:12,179 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:12,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-17 03:39:12,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:12,384 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:12,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash 425250414, now seen corresponding path program 2 times [2024-11-17 03:39:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:12,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038851094] [2024-11-17 03:39:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:39:12,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038851094] [2024-11-17 03:39:12,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038851094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685257227] [2024-11-17 03:39:12,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:12,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:12,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:12,610 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:12,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:39:12,721 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:39:12,722 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:12,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-17 03:39:12,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:12,731 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 [2024-11-17 03:39:12,733 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 6 treesize of output 5 [2024-11-17 03:39:12,871 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:39:12,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-17 03:39:12,883 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:39:12,883 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 11 treesize of output 11 [2024-11-17 03:39:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-17 03:39:13,177 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:39:13,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685257227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:13,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:39:13,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2024-11-17 03:39:13,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691924912] [2024-11-17 03:39:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:13,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:39:13,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:39:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:39:13,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:39:13,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 106 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 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 03:39:13,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:13,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:39:13,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:15,082 INFO L124 PetriNetUnfolderBase]: 9124/16318 cut-off events. [2024-11-17 03:39:15,082 INFO L125 PetriNetUnfolderBase]: For 62304/63088 co-relation queries the response was YES. [2024-11-17 03:39:15,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64526 conditions, 16318 events. 9124/16318 cut-off events. For 62304/63088 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 130062 event pairs, 2470 based on Foata normal form. 1312/17470 useless extension candidates. Maximal degree in co-relation 48424. Up to 7249 conditions per place. [2024-11-17 03:39:15,222 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 98 selfloop transitions, 13 changer transitions 0/136 dead transitions. [2024-11-17 03:39:15,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 136 transitions, 1322 flow [2024-11-17 03:39:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:39:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:39:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-11-17 03:39:15,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-11-17 03:39:15,223 INFO L175 Difference]: Start difference. First operand has 157 places, 106 transitions, 860 flow. Second operand 6 states and 170 transitions. [2024-11-17 03:39:15,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 136 transitions, 1322 flow [2024-11-17 03:39:15,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1252 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-11-17 03:39:15,276 INFO L231 Difference]: Finished difference. Result has 148 places, 104 transitions, 823 flow [2024-11-17 03:39:15,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=823, PETRI_PLACES=148, PETRI_TRANSITIONS=104} [2024-11-17 03:39:15,277 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 82 predicate places. [2024-11-17 03:39:15,277 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 104 transitions, 823 flow [2024-11-17 03:39:15,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 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 03:39:15,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:15,277 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:15,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:15,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-17 03:39:15,478 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:15,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 986184568, now seen corresponding path program 1 times [2024-11-17 03:39:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:15,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50013361] [2024-11-17 03:39:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:15,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:15,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50013361] [2024-11-17 03:39:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50013361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082953849] [2024-11-17 03:39:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:15,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:15,609 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:15,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 03:39:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:15,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:39:15,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:15,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:16,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082953849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:16,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:16,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-17 03:39:16,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359825217] [2024-11-17 03:39:16,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:16,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:39:16,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:39:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:39:16,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:39:16,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 104 transitions, 823 flow. Second operand has 19 states, 19 states have (on average 20.36842105263158) internal successors, (387), 19 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) [2024-11-17 03:39:16,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:16,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:39:16,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:18,465 INFO L124 PetriNetUnfolderBase]: 10607/16568 cut-off events. [2024-11-17 03:39:18,465 INFO L125 PetriNetUnfolderBase]: For 60691/60717 co-relation queries the response was YES. [2024-11-17 03:39:18,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67866 conditions, 16568 events. 10607/16568 cut-off events. For 60691/60717 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 111518 event pairs, 4799 based on Foata normal form. 146/15985 useless extension candidates. Maximal degree in co-relation 64232. Up to 7471 conditions per place. [2024-11-17 03:39:18,570 INFO L140 encePairwiseOnDemand]: 56/70 looper letters, 206 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-11-17 03:39:18,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 254 transitions, 2411 flow [2024-11-17 03:39:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:39:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:39:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 405 transitions. [2024-11-17 03:39:18,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2024-11-17 03:39:18,571 INFO L175 Difference]: Start difference. First operand has 148 places, 104 transitions, 823 flow. Second operand 14 states and 405 transitions. [2024-11-17 03:39:18,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 254 transitions, 2411 flow [2024-11-17 03:39:18,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 2343 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:39:18,618 INFO L231 Difference]: Finished difference. Result has 159 places, 110 transitions, 935 flow [2024-11-17 03:39:18,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=935, PETRI_PLACES=159, PETRI_TRANSITIONS=110} [2024-11-17 03:39:18,619 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 93 predicate places. [2024-11-17 03:39:18,619 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 110 transitions, 935 flow [2024-11-17 03:39:18,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.36842105263158) internal successors, (387), 19 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) [2024-11-17 03:39:18,619 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:18,619 INFO L204 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] [2024-11-17 03:39:18,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-17 03:39:18,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:18,820 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:18,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash 199965704, now seen corresponding path program 2 times [2024-11-17 03:39:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497299226] [2024-11-17 03:39:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497299226] [2024-11-17 03:39:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497299226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804687235] [2024-11-17 03:39:19,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:19,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:19,111 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:19,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 03:39:19,223 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:19,223 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:19,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:39:19,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:19,230 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 6 treesize of output 5 [2024-11-17 03:39:19,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:39:19,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:39:19,324 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:39:19,324 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 11 treesize of output 11 [2024-11-17 03:39:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:39:19,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:20,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2024-11-17 03:39:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:39:20,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804687235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:20,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:20,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-17 03:39:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286862726] [2024-11-17 03:39:20,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:20,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-17 03:39:20,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-17 03:39:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-17 03:39:20,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2024-11-17 03:39:20,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 110 transitions, 935 flow. Second operand has 25 states, 25 states have (on average 18.4) internal successors, (460), 25 states have internal predecessors, (460), 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 03:39:20,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:20,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2024-11-17 03:39:20,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:22,932 INFO L124 PetriNetUnfolderBase]: 10576/16188 cut-off events. [2024-11-17 03:39:22,933 INFO L125 PetriNetUnfolderBase]: For 72289/73333 co-relation queries the response was YES. [2024-11-17 03:39:22,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68566 conditions, 16188 events. 10576/16188 cut-off events. For 72289/73333 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 107641 event pairs, 1885 based on Foata normal form. 864/16615 useless extension candidates. Maximal degree in co-relation 64512. Up to 3918 conditions per place. [2024-11-17 03:39:23,056 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 185 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2024-11-17 03:39:23,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2266 flow [2024-11-17 03:39:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:39:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:39:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-11-17 03:39:23,057 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-17 03:39:23,057 INFO L175 Difference]: Start difference. First operand has 159 places, 110 transitions, 935 flow. Second operand 8 states and 216 transitions. [2024-11-17 03:39:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2266 flow [2024-11-17 03:39:23,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 220 transitions, 2196 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-17 03:39:23,116 INFO L231 Difference]: Finished difference. Result has 159 places, 112 transitions, 957 flow [2024-11-17 03:39:23,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=957, PETRI_PLACES=159, PETRI_TRANSITIONS=112} [2024-11-17 03:39:23,117 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 93 predicate places. [2024-11-17 03:39:23,117 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 112 transitions, 957 flow [2024-11-17 03:39:23,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.4) internal successors, (460), 25 states have internal predecessors, (460), 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 03:39:23,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:23,117 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:23,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:23,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:23,318 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:23,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash 35345597, now seen corresponding path program 2 times [2024-11-17 03:39:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:23,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129974943] [2024-11-17 03:39:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:23,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:23,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:23,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129974943] [2024-11-17 03:39:23,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129974943] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:23,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590444233] [2024-11-17 03:39:23,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:23,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:23,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:23,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:23,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-17 03:39:23,707 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:39:23,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:23,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-17 03:39:23,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:23,717 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 [2024-11-17 03:39:23,720 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 6 treesize of output 5 [2024-11-17 03:39:23,795 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:39:23,795 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 11 treesize of output 11 [2024-11-17 03:39:23,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2024-11-17 03:39:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-17 03:39:24,080 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:39:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590444233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:24,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:39:24,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2024-11-17 03:39:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194080088] [2024-11-17 03:39:24,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:24,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:39:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:39:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:39:24,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:39:24,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 112 transitions, 957 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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 03:39:24,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:24,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:39:24,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:25,417 INFO L124 PetriNetUnfolderBase]: 5890/10504 cut-off events. [2024-11-17 03:39:25,417 INFO L125 PetriNetUnfolderBase]: For 52475/52719 co-relation queries the response was YES. [2024-11-17 03:39:25,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45550 conditions, 10504 events. 5890/10504 cut-off events. For 52475/52719 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 76985 event pairs, 4179 based on Foata normal form. 325/10412 useless extension candidates. Maximal degree in co-relation 42449. Up to 8038 conditions per place. [2024-11-17 03:39:25,522 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 74 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2024-11-17 03:39:25,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 110 transitions, 1106 flow [2024-11-17 03:39:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:39:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:39:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-11-17 03:39:25,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-17 03:39:25,524 INFO L175 Difference]: Start difference. First operand has 159 places, 112 transitions, 957 flow. Second operand 5 states and 133 transitions. [2024-11-17 03:39:25,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 110 transitions, 1106 flow [2024-11-17 03:39:25,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 110 transitions, 1076 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-17 03:39:25,589 INFO L231 Difference]: Finished difference. Result has 156 places, 110 transitions, 928 flow [2024-11-17 03:39:25,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=928, PETRI_PLACES=156, PETRI_TRANSITIONS=110} [2024-11-17 03:39:25,589 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 90 predicate places. [2024-11-17 03:39:25,589 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 110 transitions, 928 flow [2024-11-17 03:39:25,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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 03:39:25,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:25,590 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:25,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-17 03:39:25,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:25,790 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:25,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash 35345595, now seen corresponding path program 3 times [2024-11-17 03:39:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:25,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782877733] [2024-11-17 03:39:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:39:25,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782877733] [2024-11-17 03:39:25,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782877733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478377908] [2024-11-17 03:39:25,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:39:25,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:25,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:25,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:25,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-17 03:39:26,038 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:39:26,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:26,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 03:39:26,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:26,045 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 6 treesize of output 5 [2024-11-17 03:39:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:39:26,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:39:26,123 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:39:26,123 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 11 treesize of output 11 [2024-11-17 03:39:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:39:26,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:26,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2024-11-17 03:39:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:39:26,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478377908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:26,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-17 03:39:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207542142] [2024-11-17 03:39:26,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:26,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-17 03:39:26,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-17 03:39:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-11-17 03:39:27,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2024-11-17 03:39:27,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 110 transitions, 928 flow. Second operand has 25 states, 25 states have (on average 18.36) internal successors, (459), 25 states have internal predecessors, (459), 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 03:39:27,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:27,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2024-11-17 03:39:27,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:30,269 INFO L124 PetriNetUnfolderBase]: 9066/13930 cut-off events. [2024-11-17 03:39:30,269 INFO L125 PetriNetUnfolderBase]: For 72581/73654 co-relation queries the response was YES. [2024-11-17 03:39:30,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59618 conditions, 13930 events. 9066/13930 cut-off events. For 72581/73654 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 91682 event pairs, 959 based on Foata normal form. 787/14581 useless extension candidates. Maximal degree in co-relation 54276. Up to 1928 conditions per place. [2024-11-17 03:39:30,363 INFO L140 encePairwiseOnDemand]: 55/70 looper letters, 381 selfloop transitions, 59 changer transitions 0/458 dead transitions. [2024-11-17 03:39:30,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 458 transitions, 4488 flow [2024-11-17 03:39:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-17 03:39:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-17 03:39:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 801 transitions. [2024-11-17 03:39:30,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3575892857142857 [2024-11-17 03:39:30,365 INFO L175 Difference]: Start difference. First operand has 156 places, 110 transitions, 928 flow. Second operand 32 states and 801 transitions. [2024-11-17 03:39:30,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 458 transitions, 4488 flow [2024-11-17 03:39:30,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 458 transitions, 4375 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:39:30,418 INFO L231 Difference]: Finished difference. Result has 184 places, 135 transitions, 1219 flow [2024-11-17 03:39:30,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1219, PETRI_PLACES=184, PETRI_TRANSITIONS=135} [2024-11-17 03:39:30,419 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 118 predicate places. [2024-11-17 03:39:30,419 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 135 transitions, 1219 flow [2024-11-17 03:39:30,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.36) internal successors, (459), 25 states have internal predecessors, (459), 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 03:39:30,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:30,420 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:30,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:30,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-17 03:39:30,620 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:30,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788992, now seen corresponding path program 2 times [2024-11-17 03:39:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:30,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630834085] [2024-11-17 03:39:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-17 03:39:30,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630834085] [2024-11-17 03:39:30,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630834085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471251254] [2024-11-17 03:39:30,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:30,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:30,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:30,838 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:39:30,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-17 03:39:30,927 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:39:30,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:30,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 03:39:30,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:30,935 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 6 treesize of output 5 [2024-11-17 03:39:30,993 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:39:30,993 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 11 treesize of output 11 [2024-11-17 03:39:30,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:39:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-17 03:39:31,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:31,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:39:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-17 03:39:31,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471251254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:31,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:31,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-11-17 03:39:31,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927982415] [2024-11-17 03:39:31,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:31,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:39:31,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:31,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:39:31,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:39:35,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:39:39,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:39:39,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-17 03:39:39,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 135 transitions, 1219 flow. Second operand has 19 states, 19 states have (on average 20.36842105263158) internal successors, (387), 19 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) [2024-11-17 03:39:39,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:39,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-17 03:39:39,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:42,316 INFO L124 PetriNetUnfolderBase]: 8321/15640 cut-off events. [2024-11-17 03:39:42,316 INFO L125 PetriNetUnfolderBase]: For 85902/86094 co-relation queries the response was YES. [2024-11-17 03:39:42,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70395 conditions, 15640 events. 8321/15640 cut-off events. For 85902/86094 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 130222 event pairs, 2485 based on Foata normal form. 260/15559 useless extension candidates. Maximal degree in co-relation 65823. Up to 3229 conditions per place. [2024-11-17 03:39:42,434 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 270 selfloop transitions, 36 changer transitions 0/345 dead transitions. [2024-11-17 03:39:42,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 345 transitions, 3664 flow [2024-11-17 03:39:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:39:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:39:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 556 transitions. [2024-11-17 03:39:42,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3782312925170068 [2024-11-17 03:39:42,439 INFO L175 Difference]: Start difference. First operand has 184 places, 135 transitions, 1219 flow. Second operand 21 states and 556 transitions. [2024-11-17 03:39:42,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 345 transitions, 3664 flow [2024-11-17 03:39:42,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 345 transitions, 3577 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-11-17 03:39:42,617 INFO L231 Difference]: Finished difference. Result has 198 places, 146 transitions, 1395 flow [2024-11-17 03:39:42,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1395, PETRI_PLACES=198, PETRI_TRANSITIONS=146} [2024-11-17 03:39:42,617 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 132 predicate places. [2024-11-17 03:39:42,617 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 146 transitions, 1395 flow [2024-11-17 03:39:42,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.36842105263158) internal successors, (387), 19 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) [2024-11-17 03:39:42,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:42,618 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:42,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-17 03:39:42,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-17 03:39:42,818 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:42,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:42,819 INFO L85 PathProgramCache]: Analyzing trace with hash 198129856, now seen corresponding path program 1 times [2024-11-17 03:39:42,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:42,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75188625] [2024-11-17 03:39:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:42,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:39:42,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:42,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75188625] [2024-11-17 03:39:42,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75188625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:42,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:42,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:39:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667539254] [2024-11-17 03:39:42,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:42,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:39:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:39:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:39:42,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2024-11-17 03:39:42,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 146 transitions, 1395 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 03:39:42,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:42,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2024-11-17 03:39:42,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:44,775 INFO L124 PetriNetUnfolderBase]: 8592/15664 cut-off events. [2024-11-17 03:39:44,776 INFO L125 PetriNetUnfolderBase]: For 106426/107112 co-relation queries the response was YES. [2024-11-17 03:39:44,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74784 conditions, 15664 events. 8592/15664 cut-off events. For 106426/107112 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 125142 event pairs, 2025 based on Foata normal form. 502/15836 useless extension candidates. Maximal degree in co-relation 70132. Up to 10957 conditions per place. [2024-11-17 03:39:44,891 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 129 selfloop transitions, 15 changer transitions 1/184 dead transitions. [2024-11-17 03:39:44,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 184 transitions, 2030 flow [2024-11-17 03:39:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:39:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:39:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-17 03:39:44,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-17 03:39:44,892 INFO L175 Difference]: Start difference. First operand has 198 places, 146 transitions, 1395 flow. Second operand 3 states and 114 transitions. [2024-11-17 03:39:44,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 184 transitions, 2030 flow [2024-11-17 03:39:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 184 transitions, 1955 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-11-17 03:39:45,009 INFO L231 Difference]: Finished difference. Result has 189 places, 158 transitions, 1516 flow [2024-11-17 03:39:45,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1516, PETRI_PLACES=189, PETRI_TRANSITIONS=158} [2024-11-17 03:39:45,009 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 123 predicate places. [2024-11-17 03:39:45,010 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 158 transitions, 1516 flow [2024-11-17 03:39:45,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 03:39:45,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:45,010 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:45,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-17 03:39:45,010 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:39:45,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 19795598, now seen corresponding path program 1 times [2024-11-17 03:39:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:45,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743192373] [2024-11-17 03:39:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:45,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:39:45,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743192373] [2024-11-17 03:39:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743192373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:45,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:45,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:39:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212410917] [2024-11-17 03:39:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:45,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:39:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:39:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:39:45,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-17 03:39:45,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 158 transitions, 1516 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 03:39:45,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:45,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-17 03:39:45,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand