./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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-two-queue.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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:23:10,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:23:10,723 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:23:10,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:23:10,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:23:10,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:23:10,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:23:10,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:23:10,763 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:23:10,763 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:23:10,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:23:10,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:23:10,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:23:10,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:23:10,765 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:23:10,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:23:10,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:23:10,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:23:10,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:23:10,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:23:10,770 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:23:10,770 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:23:10,770 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:23:10,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:23:10,774 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:23:10,775 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:23:10,775 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:23:10,775 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:23:10,775 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:23:10,776 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:23:10,776 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:23:10,776 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:23:10,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:23:10,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:23:10,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:23:10,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:23:10,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:23:10,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:23:10,778 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:23:10,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:23:10,779 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:23:10,779 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:23:10,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-11-10 18:23:11,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:23:11,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:23:11,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:23:11,057 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:23:11,058 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:23:11,059 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-10 18:23:12,533 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:23:12,738 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:23:12,739 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-10 18:23:12,749 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335585578/dfd55f54130641d58d804ee949fe3de6/FLAG293018137 [2024-11-10 18:23:12,761 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335585578/dfd55f54130641d58d804ee949fe3de6 [2024-11-10 18:23:12,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:23:12,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:23:12,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:23:12,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:23:12,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:23:12,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:23:12" (1/1) ... [2024-11-10 18:23:12,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1b0ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:12, skipping insertion in model container [2024-11-10 18:23:12,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:23:12" (1/1) ... [2024-11-10 18:23:12,795 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:23:13,084 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:23:13,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:23:13,100 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:23:13,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:23:13,156 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:23:13,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13 WrapperNode [2024-11-10 18:23:13,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:23:13,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:23:13,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:23:13,159 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:23:13,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,214 INFO L138 Inliner]: procedures = 23, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 196 [2024-11-10 18:23:13,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:23:13,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:23:13,216 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:23:13,216 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:23:13,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,230 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,250 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-11-10 18:23:13,251 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,251 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,260 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:23:13,268 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:23:13,268 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:23:13,268 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:23:13,269 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (1/1) ... [2024-11-10 18:23:13,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:23:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:13,317 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) [2024-11-10 18:23:13,325 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 [2024-11-10 18:23:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:23:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:23:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:23:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:23:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:23:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:23:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:23:13,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:23:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:23:13,383 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:23:13,513 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:23:13,516 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:23:13,896 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:23:13,896 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:23:14,213 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:23:14,213 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:23:14,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:23:14 BoogieIcfgContainer [2024-11-10 18:23:14,214 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:23:14,217 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:23:14,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:23:14,221 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:23:14,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:23:12" (1/3) ... [2024-11-10 18:23:14,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ca8f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:23:14, skipping insertion in model container [2024-11-10 18:23:14,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:23:13" (2/3) ... [2024-11-10 18:23:14,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ca8f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:23:14, skipping insertion in model container [2024-11-10 18:23:14,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:23:14" (3/3) ... [2024-11-10 18:23:14,226 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-11-10 18:23:14,245 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:23:14,245 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-10 18:23:14,245 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:23:14,299 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:23:14,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 56 transitions, 126 flow [2024-11-10 18:23:14,368 INFO L124 PetriNetUnfolderBase]: 8/54 cut-off events. [2024-11-10 18:23:14,372 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 18:23:14,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 8/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 108 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2024-11-10 18:23:14,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 56 transitions, 126 flow [2024-11-10 18:23:14,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 53 transitions, 118 flow [2024-11-10 18:23:14,398 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:23:14,406 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;@9840e91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:23:14,406 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-10 18:23:14,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:23:14,410 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:23:14,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:23:14,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:14,411 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:23:14,412 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:14,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash 17610444, now seen corresponding path program 1 times [2024-11-10 18:23:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382969267] [2024-11-10 18:23:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:14,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382969267] [2024-11-10 18:23:14,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382969267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:14,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:14,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:23:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577855491] [2024-11-10 18:23:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:14,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:23:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:14,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:23:14,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:23:14,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:14,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-11-10 18:23:14,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:14,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:14,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:15,069 INFO L124 PetriNetUnfolderBase]: 359/655 cut-off events. [2024-11-10 18:23:15,069 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-10 18:23:15,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 655 events. 359/655 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3441 event pairs, 219 based on Foata normal form. 68/428 useless extension candidates. Maximal degree in co-relation 1150. Up to 544 conditions per place. [2024-11-10 18:23:15,079 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 28 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-10 18:23:15,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 162 flow [2024-11-10 18:23:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:23:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:23:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-10 18:23:15,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-10 18:23:15,096 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 118 flow. Second operand 3 states and 91 transitions. [2024-11-10 18:23:15,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 162 flow [2024-11-10 18:23:15,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:23:15,105 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 98 flow [2024-11-10 18:23:15,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-11-10 18:23:15,112 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-10 18:23:15,112 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 98 flow [2024-11-10 18:23:15,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-11-10 18:23:15,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:15,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:23:15,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:23:15,114 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:15,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash 17610445, now seen corresponding path program 1 times [2024-11-10 18:23:15,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:15,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295945441] [2024-11-10 18:23:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295945441] [2024-11-10 18:23:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295945441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:15,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:15,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:23:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363674697] [2024-11-10 18:23:15,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:15,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:23:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:23:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:23:15,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:15,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2024-11-10 18:23:15,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:15,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:15,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:15,696 INFO L124 PetriNetUnfolderBase]: 360/660 cut-off events. [2024-11-10 18:23:15,697 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-10 18:23:15,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1229 conditions, 660 events. 360/660 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3447 event pairs, 219 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1194. Up to 553 conditions per place. [2024-11-10 18:23:15,704 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 31 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2024-11-10 18:23:15,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 174 flow [2024-11-10 18:23:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:23:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:23:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-11-10 18:23:15,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-11-10 18:23:15,708 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 98 flow. Second operand 4 states and 108 transitions. [2024-11-10 18:23:15,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 174 flow [2024-11-10 18:23:15,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:23:15,711 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 121 flow [2024-11-10 18:23:15,713 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-11-10 18:23:15,713 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-11-10 18:23:15,714 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 121 flow [2024-11-10 18:23:15,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2024-11-10 18:23:15,714 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:15,714 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:23:15,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:23:15,715 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:15,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash 647326876, now seen corresponding path program 1 times [2024-11-10 18:23:15,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:15,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986588101] [2024-11-10 18:23:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:15,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:16,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:16,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986588101] [2024-11-10 18:23:16,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986588101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608658270] [2024-11-10 18:23:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:16,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:16,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:16,034 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) [2024-11-10 18:23:16,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:23:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:16,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:23:16,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:16,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:23:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:16,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:16,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608658270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:16,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:16,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:23:16,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693885884] [2024-11-10 18:23:16,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:16,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:23:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:23:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:23:16,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-10 18:23:16,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 121 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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) [2024-11-10 18:23:16,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:16,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-10 18:23:16,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:17,046 INFO L124 PetriNetUnfolderBase]: 360/659 cut-off events. [2024-11-10 18:23:17,047 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-10 18:23:17,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 659 events. 360/659 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3427 event pairs, 219 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 1215. Up to 549 conditions per place. [2024-11-10 18:23:17,051 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 28 selfloop transitions, 9 changer transitions 0/48 dead transitions. [2024-11-10 18:23:17,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 193 flow [2024-11-10 18:23:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:23:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:23:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-11-10 18:23:17,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3826530612244898 [2024-11-10 18:23:17,056 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 121 flow. Second operand 7 states and 150 transitions. [2024-11-10 18:23:17,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 193 flow [2024-11-10 18:23:17,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:23:17,060 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 132 flow [2024-11-10 18:23:17,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-10 18:23:17,062 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-10 18:23:17,062 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 132 flow [2024-11-10 18:23:17,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 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) [2024-11-10 18:23:17,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:17,063 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:17,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:23:17,267 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 [2024-11-10 18:23:17,268 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:17,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:17,269 INFO L85 PathProgramCache]: Analyzing trace with hash 646762948, now seen corresponding path program 1 times [2024-11-10 18:23:17,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:17,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23427318] [2024-11-10 18:23:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:17,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23427318] [2024-11-10 18:23:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23427318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:17,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:23:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478055673] [2024-11-10 18:23:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:17,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:23:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:23:17,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:23:17,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:17,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-10 18:23:17,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:17,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:17,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:17,689 INFO L124 PetriNetUnfolderBase]: 361/664 cut-off events. [2024-11-10 18:23:17,690 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:23:17,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 664 events. 361/664 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3481 event pairs, 219 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 1226. Up to 551 conditions per place. [2024-11-10 18:23:17,694 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 30 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-10 18:23:17,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 214 flow [2024-11-10 18:23:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:23:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:23:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-10 18:23:17,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-10 18:23:17,696 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 132 flow. Second operand 5 states and 128 transitions. [2024-11-10 18:23:17,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 214 flow [2024-11-10 18:23:17,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 185 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 18:23:17,699 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 142 flow [2024-11-10 18:23:17,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-10 18:23:17,700 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-11-10 18:23:17,700 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 142 flow [2024-11-10 18:23:17,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-10 18:23:17,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:17,701 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:17,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:23:17,701 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:17,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash 492266106, now seen corresponding path program 1 times [2024-11-10 18:23:17,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:17,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345984002] [2024-11-10 18:23:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:17,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:17,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:17,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345984002] [2024-11-10 18:23:17,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345984002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:17,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467266634] [2024-11-10 18:23:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:17,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:17,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:17,919 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) [2024-11-10 18:23:17,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:23:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:17,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:23:17,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:18,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:23:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:18,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:18,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467266634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:18,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:18,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:23:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73414043] [2024-11-10 18:23:18,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:18,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:23:18,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:18,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:23:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:23:18,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-10 18:23:18,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 142 flow. Second operand has 13 states, 13 states have (on average 17.46153846153846) internal successors, (227), 13 states have internal predecessors, (227), 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) [2024-11-10 18:23:18,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:18,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-10 18:23:18,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:18,936 INFO L124 PetriNetUnfolderBase]: 363/673 cut-off events. [2024-11-10 18:23:18,937 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-10 18:23:18,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 673 events. 363/673 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 3522 event pairs, 219 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1210. Up to 545 conditions per place. [2024-11-10 18:23:18,941 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 30 selfloop transitions, 18 changer transitions 0/59 dead transitions. [2024-11-10 18:23:18,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 266 flow [2024-11-10 18:23:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:23:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:23:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-11-10 18:23:18,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-11-10 18:23:18,943 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 142 flow. Second operand 9 states and 194 transitions. [2024-11-10 18:23:18,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 266 flow [2024-11-10 18:23:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:23:18,945 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 192 flow [2024-11-10 18:23:18,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=192, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-11-10 18:23:18,946 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2024-11-10 18:23:18,946 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 192 flow [2024-11-10 18:23:18,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.46153846153846) internal successors, (227), 13 states have internal predecessors, (227), 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) [2024-11-10 18:23:18,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:18,947 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:18,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:23:19,148 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 [2024-11-10 18:23:19,149 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:19,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:19,149 INFO L85 PathProgramCache]: Analyzing trace with hash 505875971, now seen corresponding path program 1 times [2024-11-10 18:23:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710952762] [2024-11-10 18:23:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:19,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710952762] [2024-11-10 18:23:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710952762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:19,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:19,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:23:19,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125126211] [2024-11-10 18:23:19,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:19,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:23:19,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:23:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:23:19,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:19,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-11-10 18:23:19,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:19,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:19,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:19,330 INFO L124 PetriNetUnfolderBase]: 285/552 cut-off events. [2024-11-10 18:23:19,331 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-10 18:23:19,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 552 events. 285/552 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 2782 event pairs, 171 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 973. Up to 431 conditions per place. [2024-11-10 18:23:19,334 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 36 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-11-10 18:23:19,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 268 flow [2024-11-10 18:23:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:23:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:23:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-10 18:23:19,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-11-10 18:23:19,336 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 192 flow. Second operand 4 states and 102 transitions. [2024-11-10 18:23:19,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 268 flow [2024-11-10 18:23:19,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 235 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-10 18:23:19,338 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 163 flow [2024-11-10 18:23:19,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2024-11-10 18:23:19,339 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-10 18:23:19,340 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 163 flow [2024-11-10 18:23:19,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-11-10 18:23:19,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:19,340 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:19,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:23:19,341 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:19,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:19,341 INFO L85 PathProgramCache]: Analyzing trace with hash 505875972, now seen corresponding path program 1 times [2024-11-10 18:23:19,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:19,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627632907] [2024-11-10 18:23:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:19,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:19,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:19,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627632907] [2024-11-10 18:23:19,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627632907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:19,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:19,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:23:19,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873913235] [2024-11-10 18:23:19,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:19,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:23:19,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:23:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:23:19,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:19,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-10 18:23:19,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:19,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:19,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:19,541 INFO L124 PetriNetUnfolderBase]: 307/619 cut-off events. [2024-11-10 18:23:19,541 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-10 18:23:19,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 619 events. 307/619 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3269 event pairs, 194 based on Foata normal form. 14/401 useless extension candidates. Maximal degree in co-relation 958. Up to 448 conditions per place. [2024-11-10 18:23:19,545 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 48 selfloop transitions, 6 changer transitions 1/66 dead transitions. [2024-11-10 18:23:19,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 303 flow [2024-11-10 18:23:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:23:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:23:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-11-10 18:23:19,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-10 18:23:19,546 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 163 flow. Second operand 5 states and 140 transitions. [2024-11-10 18:23:19,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 303 flow [2024-11-10 18:23:19,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:23:19,549 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 188 flow [2024-11-10 18:23:19,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-11-10 18:23:19,549 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2024-11-10 18:23:19,550 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 188 flow [2024-11-10 18:23:19,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-10 18:23:19,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:19,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:19,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:23:19,551 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:19,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash -704317962, now seen corresponding path program 1 times [2024-11-10 18:23:19,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:19,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532344747] [2024-11-10 18:23:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:19,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532344747] [2024-11-10 18:23:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532344747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:19,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:19,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:23:19,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57829990] [2024-11-10 18:23:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:19,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:23:19,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:19,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:23:19,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:23:19,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:19,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-10 18:23:19,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:19,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:19,759 INFO L124 PetriNetUnfolderBase]: 234/496 cut-off events. [2024-11-10 18:23:19,759 INFO L125 PetriNetUnfolderBase]: For 83/95 co-relation queries the response was YES. [2024-11-10 18:23:19,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 496 events. 234/496 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2535 event pairs, 146 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 859. Up to 374 conditions per place. [2024-11-10 18:23:19,762 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 31 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-11-10 18:23:19,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 260 flow [2024-11-10 18:23:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:23:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:23:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-10 18:23:19,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-11-10 18:23:19,764 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 188 flow. Second operand 5 states and 118 transitions. [2024-11-10 18:23:19,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 260 flow [2024-11-10 18:23:19,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 52 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:23:19,766 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 194 flow [2024-11-10 18:23:19,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-11-10 18:23:19,769 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 6 predicate places. [2024-11-10 18:23:19,770 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 194 flow [2024-11-10 18:23:19,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-10 18:23:19,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:19,770 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:19,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:23:19,771 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:19,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash -704317961, now seen corresponding path program 1 times [2024-11-10 18:23:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:19,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224502893] [2024-11-10 18:23:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:19,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:19,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:19,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224502893] [2024-11-10 18:23:19,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224502893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:19,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:19,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:23:19,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451419068] [2024-11-10 18:23:19,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:19,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:23:19,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:23:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:23:19,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:19,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-10 18:23:19,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:19,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:19,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:19,977 INFO L124 PetriNetUnfolderBase]: 263/617 cut-off events. [2024-11-10 18:23:19,978 INFO L125 PetriNetUnfolderBase]: For 92/104 co-relation queries the response was YES. [2024-11-10 18:23:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 617 events. 263/617 cut-off events. For 92/104 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3507 event pairs, 174 based on Foata normal form. 12/439 useless extension candidates. Maximal degree in co-relation 838. Up to 393 conditions per place. [2024-11-10 18:23:19,982 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 59 selfloop transitions, 4 changer transitions 1/75 dead transitions. [2024-11-10 18:23:19,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 413 flow [2024-11-10 18:23:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:23:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:23:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-10 18:23:19,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-11-10 18:23:19,984 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 194 flow. Second operand 5 states and 141 transitions. [2024-11-10 18:23:19,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 413 flow [2024-11-10 18:23:19,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 399 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:23:19,986 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 207 flow [2024-11-10 18:23:19,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-11-10 18:23:19,987 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-11-10 18:23:19,987 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 207 flow [2024-11-10 18:23:19,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-10 18:23:19,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:19,988 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:19,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:23:19,988 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:19,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:19,989 INFO L85 PathProgramCache]: Analyzing trace with hash -972521714, now seen corresponding path program 1 times [2024-11-10 18:23:19,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:19,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104493698] [2024-11-10 18:23:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:19,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104493698] [2024-11-10 18:23:20,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104493698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:20,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:20,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:23:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982018844] [2024-11-10 18:23:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:20,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:23:20,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:23:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:23:20,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-10 18:23:20,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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) [2024-11-10 18:23:20,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:20,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-10 18:23:20,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:20,370 INFO L124 PetriNetUnfolderBase]: 198/507 cut-off events. [2024-11-10 18:23:20,371 INFO L125 PetriNetUnfolderBase]: For 115/151 co-relation queries the response was YES. [2024-11-10 18:23:20,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 507 events. 198/507 cut-off events. For 115/151 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2782 event pairs, 132 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 864. Up to 350 conditions per place. [2024-11-10 18:23:20,374 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 32 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2024-11-10 18:23:20,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 279 flow [2024-11-10 18:23:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:23:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:23:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-10 18:23:20,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-11-10 18:23:20,376 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 207 flow. Second operand 5 states and 118 transitions. [2024-11-10 18:23:20,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 279 flow [2024-11-10 18:23:20,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:23:20,378 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 213 flow [2024-11-10 18:23:20,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-11-10 18:23:20,379 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-10 18:23:20,379 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 213 flow [2024-11-10 18:23:20,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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) [2024-11-10 18:23:20,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:20,380 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:20,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:23:20,380 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:20,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:20,381 INFO L85 PathProgramCache]: Analyzing trace with hash -925108986, now seen corresponding path program 1 times [2024-11-10 18:23:20,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:20,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340469746] [2024-11-10 18:23:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:20,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:20,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:20,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340469746] [2024-11-10 18:23:20,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340469746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:20,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:20,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:23:20,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150176530] [2024-11-10 18:23:20,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:20,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:23:20,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:20,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:23:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:23:20,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-10 18:23:20,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-11-10 18:23:20,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:20,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-10 18:23:20,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:20,827 INFO L124 PetriNetUnfolderBase]: 144/411 cut-off events. [2024-11-10 18:23:20,827 INFO L125 PetriNetUnfolderBase]: For 125/141 co-relation queries the response was YES. [2024-11-10 18:23:20,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 411 events. 144/411 cut-off events. For 125/141 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2167 event pairs, 96 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 611. Up to 287 conditions per place. [2024-11-10 18:23:20,830 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 34 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-11-10 18:23:20,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 281 flow [2024-11-10 18:23:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:23:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:23:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-10 18:23:20,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-11-10 18:23:20,831 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 213 flow. Second operand 4 states and 90 transitions. [2024-11-10 18:23:20,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 281 flow [2024-11-10 18:23:20,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 268 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:23:20,833 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 200 flow [2024-11-10 18:23:20,833 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-11-10 18:23:20,833 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-10 18:23:20,833 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 200 flow [2024-11-10 18:23:20,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-11-10 18:23:20,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:20,834 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:20,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:23:20,836 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:20,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash 924672338, now seen corresponding path program 1 times [2024-11-10 18:23:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5184263] [2024-11-10 18:23:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:20,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:20,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5184263] [2024-11-10 18:23:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5184263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:20,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:20,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:23:20,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957489971] [2024-11-10 18:23:20,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:20,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:23:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:23:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:23:20,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-10 18:23:20,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-11-10 18:23:20,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:20,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-10 18:23:20,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:20,995 INFO L124 PetriNetUnfolderBase]: 180/481 cut-off events. [2024-11-10 18:23:20,995 INFO L125 PetriNetUnfolderBase]: For 142/158 co-relation queries the response was YES. [2024-11-10 18:23:20,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 481 events. 180/481 cut-off events. For 142/158 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2615 event pairs, 61 based on Foata normal form. 4/403 useless extension candidates. Maximal degree in co-relation 774. Up to 181 conditions per place. [2024-11-10 18:23:20,998 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 39 selfloop transitions, 3 changer transitions 5/60 dead transitions. [2024-11-10 18:23:20,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 323 flow [2024-11-10 18:23:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:23:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:23:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-11-10 18:23:20,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-11-10 18:23:20,999 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 200 flow. Second operand 3 states and 94 transitions. [2024-11-10 18:23:20,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 323 flow [2024-11-10 18:23:21,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:23:21,001 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 189 flow [2024-11-10 18:23:21,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2024-11-10 18:23:21,002 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-11-10 18:23:21,002 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 189 flow [2024-11-10 18:23:21,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-11-10 18:23:21,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:21,003 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] [2024-11-10 18:23:21,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:23:21,003 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:21,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash -942666596, now seen corresponding path program 1 times [2024-11-10 18:23:21,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:21,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397642211] [2024-11-10 18:23:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:23:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:21,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397642211] [2024-11-10 18:23:21,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397642211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:21,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:21,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:23:21,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370912978] [2024-11-10 18:23:21,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:21,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:23:21,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:21,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:23:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:23:21,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-10 18:23:21,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-11-10 18:23:21,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:21,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-10 18:23:21,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:21,131 INFO L124 PetriNetUnfolderBase]: 107/266 cut-off events. [2024-11-10 18:23:21,132 INFO L125 PetriNetUnfolderBase]: For 132/136 co-relation queries the response was YES. [2024-11-10 18:23:21,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 266 events. 107/266 cut-off events. For 132/136 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1111 event pairs, 22 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 571. Up to 143 conditions per place. [2024-11-10 18:23:21,133 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 37 selfloop transitions, 2 changer transitions 2/54 dead transitions. [2024-11-10 18:23:21,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 291 flow [2024-11-10 18:23:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:23:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:23:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-10 18:23:21,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-10 18:23:21,135 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 189 flow. Second operand 3 states and 90 transitions. [2024-11-10 18:23:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 291 flow [2024-11-10 18:23:21,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:23:21,137 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 198 flow [2024-11-10 18:23:21,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2024-11-10 18:23:21,138 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 6 predicate places. [2024-11-10 18:23:21,138 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 198 flow [2024-11-10 18:23:21,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-11-10 18:23:21,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:21,138 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] [2024-11-10 18:23:21,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:23:21,139 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:21,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:21,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1965017997, now seen corresponding path program 1 times [2024-11-10 18:23:21,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:21,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057316598] [2024-11-10 18:23:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:21,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:23:21,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:21,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057316598] [2024-11-10 18:23:21,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057316598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:23:21,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:23:21,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:23:21,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642084298] [2024-11-10 18:23:21,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:23:21,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:23:21,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:23:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:23:21,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-11-10 18:23:21,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-11-10 18:23:21,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:21,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-11-10 18:23:21,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:21,262 INFO L124 PetriNetUnfolderBase]: 82/220 cut-off events. [2024-11-10 18:23:21,263 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-10 18:23:21,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 220 events. 82/220 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 755 event pairs, 28 based on Foata normal form. 5/192 useless extension candidates. Maximal degree in co-relation 484. Up to 112 conditions per place. [2024-11-10 18:23:21,264 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 38 selfloop transitions, 2 changer transitions 4/57 dead transitions. [2024-11-10 18:23:21,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 314 flow [2024-11-10 18:23:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:23:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:23:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-11-10 18:23:21,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-11-10 18:23:21,266 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 198 flow. Second operand 3 states and 92 transitions. [2024-11-10 18:23:21,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 314 flow [2024-11-10 18:23:21,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 307 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-10 18:23:21,268 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 208 flow [2024-11-10 18:23:21,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-11-10 18:23:21,268 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-10 18:23:21,269 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 208 flow [2024-11-10 18:23:21,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-11-10 18:23:21,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:23:21,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:23:21,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:23:21,270 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:23:21,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:23:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1595772668, now seen corresponding path program 1 times [2024-11-10 18:23:21,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:23:21,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850125804] [2024-11-10 18:23:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:21,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:23:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:22,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:23:22,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850125804] [2024-11-10 18:23:22,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850125804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:23:22,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190212297] [2024-11-10 18:23:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:23:22,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:23:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:23:22,840 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) [2024-11-10 18:23:22,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:23:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:23:22,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-10 18:23:22,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:23:22,956 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 [2024-11-10 18:23:23,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 18:23:23,184 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:23:23,184 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 [2024-11-10 18:23:23,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 18:23:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:24,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:23:27,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:23:27,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 272 [2024-11-10 18:23:27,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 296 [2024-11-10 18:23:27,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:23:27,919 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 188 treesize of output 172 [2024-11-10 18:23:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:23:28,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190212297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:23:28,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:23:28,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-11-10 18:23:28,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599697860] [2024-11-10 18:23:28,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:23:28,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-10 18:23:28,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:23:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-10 18:23:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2024-11-10 18:23:29,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 56 [2024-11-10 18:23:29,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 208 flow. Second operand has 47 states, 47 states have (on average 13.702127659574469) internal successors, (644), 47 states have internal predecessors, (644), 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) [2024-11-10 18:23:29,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:23:29,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 56 [2024-11-10 18:23:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:23:36,282 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] [2024-11-10 18:23:40,888 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] [2024-11-10 18:24:00,228 INFO L124 PetriNetUnfolderBase]: 881/1703 cut-off events. [2024-11-10 18:24:00,228 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2024-11-10 18:24:00,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 1703 events. 881/1703 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9617 event pairs, 111 based on Foata normal form. 3/1529 useless extension candidates. Maximal degree in co-relation 3720. Up to 305 conditions per place. [2024-11-10 18:24:00,239 INFO L140 encePairwiseOnDemand]: 36/56 looper letters, 223 selfloop transitions, 166 changer transitions 36/432 dead transitions. [2024-11-10 18:24:00,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 432 transitions, 2283 flow [2024-11-10 18:24:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-10 18:24:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-11-10 18:24:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1336 transitions. [2024-11-10 18:24:00,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3180952380952381 [2024-11-10 18:24:00,250 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 208 flow. Second operand 75 states and 1336 transitions. [2024-11-10 18:24:00,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 432 transitions, 2283 flow [2024-11-10 18:24:00,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 432 transitions, 2255 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-10 18:24:00,260 INFO L231 Difference]: Finished difference. Result has 166 places, 210 transitions, 1531 flow [2024-11-10 18:24:00,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=1531, PETRI_PLACES=166, PETRI_TRANSITIONS=210} [2024-11-10 18:24:00,261 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-11-10 18:24:00,261 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 210 transitions, 1531 flow [2024-11-10 18:24:00,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 13.702127659574469) internal successors, (644), 47 states have internal predecessors, (644), 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) [2024-11-10 18:24:00,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:24:00,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:24:00,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:24:00,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:24:00,467 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-10 18:24:00,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:24:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash 806541314, now seen corresponding path program 2 times [2024-11-10 18:24:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:24:00,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999358667] [2024-11-10 18:24:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:24:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:24:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:24:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:24:01,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:24:01,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999358667] [2024-11-10 18:24:01,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999358667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:24:01,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595743162] [2024-11-10 18:24:01,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:24:01,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:24:01,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:24:01,779 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) [2024-11-10 18:24:01,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:24:01,868 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:24:01,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:24:01,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-10 18:24:01,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:24:01,883 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 [2024-11-10 18:24:01,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 18:24:02,077 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:24:02,078 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 [2024-11-10 18:24:02,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 18:24:02,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2024-11-10 18:24:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:24:02,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:24:09,074 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-10 18:24:09,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 352 treesize of output 362 [2024-11-10 18:24:09,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:24:09,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 255 treesize of output 253 [2024-11-10 18:24:09,203 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 20 treesize of output 14 [2024-11-10 18:24:09,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:24:09,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 182 [2024-11-10 18:24:10,126 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-10 18:24:10,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 373 treesize of output 355 [2024-11-10 18:24:10,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:24:10,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 318 [2024-11-10 18:24:10,584 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 128 treesize of output 116 [2024-11-10 18:24:10,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:24:10,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 319 [2024-11-10 18:24:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:24:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595743162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:24:13,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:24:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-11-10 18:24:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162007587] [2024-11-10 18:24:13,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:24:13,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-10 18:24:13,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:24:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-10 18:24:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1960, Unknown=1, NotChecked=0, Total=2162 [2024-11-10 18:24:18,171 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] [2024-11-10 18:24:22,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:24:24,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:24:24,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 56 [2024-11-10 18:24:24,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 210 transitions, 1531 flow. Second operand has 47 states, 47 states have (on average 10.680851063829786) internal successors, (502), 47 states have internal predecessors, (502), 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) [2024-11-10 18:24:24,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:24:24,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 56 [2024-11-10 18:24:24,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:24:29,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:24:33,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:24:37,194 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]