./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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-more-array-sum2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:19:18,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:19:18,629 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:19:18,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:19:18,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:19:18,652 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:19:18,652 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:19:18,653 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:19:18,653 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:19:18,656 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:19:18,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:19:18,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:19:18,657 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:19:18,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:19:18,659 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:19:18,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:19:18,659 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:19:18,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:19:18,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:19:18,660 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:19:18,660 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:19:18,660 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:19:18,660 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:19:18,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:19:18,661 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:19:18,661 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:19:18,661 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:19:18,661 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:19:18,662 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:19:18,662 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:19:18,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:19:18,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:19:18,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:19:18,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:19:18,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:19:18,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:19:18,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:19:18,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:19:18,664 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:19:18,664 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:19:18,664 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:19:18,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:19:18,665 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2024-11-10 18:19:18,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:19:18,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:19:18,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:19:18,931 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:19:18,931 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:19:18,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-10 18:19:20,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:19:20,402 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:19:20,403 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-10 18:19:20,413 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c1dbd9af/73a586a59ef745c8a4a49a7f963b994c/FLAG9b01b1174 [2024-11-10 18:19:20,776 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c1dbd9af/73a586a59ef745c8a4a49a7f963b994c [2024-11-10 18:19:20,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:19:20,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:19:20,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:19:20,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:19:20,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:19:20,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:19:20" (1/1) ... [2024-11-10 18:19:20,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648e9e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:20, skipping insertion in model container [2024-11-10 18:19:20,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:19:20" (1/1) ... [2024-11-10 18:19:20,815 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:19:21,004 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 18:19:21,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:19:21,021 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:19:21,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:19:21,070 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:19:21,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21 WrapperNode [2024-11-10 18:19:21,071 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:19:21,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:19:21,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:19:21,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:19:21,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,087 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,115 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 261 [2024-11-10 18:19:21,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:19:21,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:19:21,116 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:19:21,116 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:19:21,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,129 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,152 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 18:19:21,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,159 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:19:21,167 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:19:21,167 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:19:21,167 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:19:21,170 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (1/1) ... [2024-11-10 18:19:21,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:19:21,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:21,210 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 18:19:21,216 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 18:19:21,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:19:21,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:19:21,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:19:21,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:19:21,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:19:21,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:19:21,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:19:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:19:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:19:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:19:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:19:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:19:21,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:19:21,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:19:21,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:19:21,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:19:21,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:19:21,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:19:21,256 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 18:19:21,361 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:19:21,363 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:19:21,753 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:19:21,753 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:19:22,076 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:19:22,077 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:19:22,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:22 BoogieIcfgContainer [2024-11-10 18:19:22,078 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:19:22,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:19:22,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:19:22,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:19:22,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:19:20" (1/3) ... [2024-11-10 18:19:22,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5de38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:22, skipping insertion in model container [2024-11-10 18:19:22,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:19:21" (2/3) ... [2024-11-10 18:19:22,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5de38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:19:22, skipping insertion in model container [2024-11-10 18:19:22,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:19:22" (3/3) ... [2024-11-10 18:19:22,087 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2024-11-10 18:19:22,104 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:19:22,104 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-10 18:19:22,104 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:19:22,164 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:19:22,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 70 transitions, 161 flow [2024-11-10 18:19:22,228 INFO L124 PetriNetUnfolderBase]: 10/67 cut-off events. [2024-11-10 18:19:22,229 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:19:22,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 10/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 162 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-11-10 18:19:22,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 70 transitions, 161 flow [2024-11-10 18:19:22,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 66 transitions, 150 flow [2024-11-10 18:19:22,248 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:19:22,254 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;@6fb7dbeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:19:22,255 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-10 18:19:22,258 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:19:22,258 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:19:22,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:19:22,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:22,259 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:19:22,260 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:22,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 25504038, now seen corresponding path program 1 times [2024-11-10 18:19:22,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252458549] [2024-11-10 18:19:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:22,486 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 18:19:22,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:22,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252458549] [2024-11-10 18:19:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252458549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:22,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:22,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:19:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428629699] [2024-11-10 18:19:22,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:22,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:19:22,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:19:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:19:22,533 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:22,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:22,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:22,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:22,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:23,091 INFO L124 PetriNetUnfolderBase]: 2971/4663 cut-off events. [2024-11-10 18:19:23,092 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-11-10 18:19:23,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9105 conditions, 4663 events. 2971/4663 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32412 event pairs, 2534 based on Foata normal form. 438/3145 useless extension candidates. Maximal degree in co-relation 8582. Up to 4213 conditions per place. [2024-11-10 18:19:23,126 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 39 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-11-10 18:19:23,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 214 flow [2024-11-10 18:19:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:19:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:19:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-11-10 18:19:23,137 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-11-10 18:19:23,138 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 150 flow. Second operand 3 states and 109 transitions. [2024-11-10 18:19:23,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 214 flow [2024-11-10 18:19:23,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 202 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:19:23,150 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 124 flow [2024-11-10 18:19:23,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-11-10 18:19:23,156 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2024-11-10 18:19:23,157 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 124 flow [2024-11-10 18:19:23,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:23,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:23,157 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:19:23,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:19:23,157 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:23,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 25504039, now seen corresponding path program 1 times [2024-11-10 18:19:23,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:23,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252767704] [2024-11-10 18:19:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:23,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:23,437 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 18:19:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:23,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252767704] [2024-11-10 18:19:23,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252767704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:23,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:23,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:19:23,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406558822] [2024-11-10 18:19:23,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:23,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:23,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:19:23,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:23,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:23,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:23,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:23,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:23,929 INFO L124 PetriNetUnfolderBase]: 2972/4668 cut-off events. [2024-11-10 18:19:23,930 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-10 18:19:23,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8969 conditions, 4668 events. 2972/4668 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32546 event pairs, 2534 based on Foata normal form. 0/2710 useless extension candidates. Maximal degree in co-relation 8934. Up to 4222 conditions per place. [2024-11-10 18:19:23,953 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 42 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-10 18:19:23,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 222 flow [2024-11-10 18:19:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-10 18:19:23,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-11-10 18:19:23,958 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 124 flow. Second operand 4 states and 127 transitions. [2024-11-10 18:19:23,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 222 flow [2024-11-10 18:19:23,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:23,962 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 147 flow [2024-11-10 18:19:23,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-10 18:19:23,963 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2024-11-10 18:19:23,963 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 147 flow [2024-11-10 18:19:23,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:23,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:23,964 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:19:23,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:19:23,964 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:23,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:23,966 INFO L85 PathProgramCache]: Analyzing trace with hash -417578243, now seen corresponding path program 1 times [2024-11-10 18:19:23,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:23,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523402598] [2024-11-10 18:19:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:23,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:24,251 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 18:19:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523402598] [2024-11-10 18:19:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523402598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635394332] [2024-11-10 18:19:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:24,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:24,262 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 18:19:24,263 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 18:19:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:24,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 18:19:24,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:24,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:24,552 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 18:19:24,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:24,680 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 18:19:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635394332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:24,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:24,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:19:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905377047] [2024-11-10 18:19:24,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:24,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:19:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:19:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:19:24,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:19:24,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:24,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:24,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:19:24,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:25,361 INFO L124 PetriNetUnfolderBase]: 2972/4667 cut-off events. [2024-11-10 18:19:25,361 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-10 18:19:25,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8980 conditions, 4667 events. 2972/4667 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32411 event pairs, 2534 based on Foata normal form. 0/2709 useless extension candidates. Maximal degree in co-relation 8955. Up to 4218 conditions per place. [2024-11-10 18:19:25,394 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 39 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-11-10 18:19:25,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 241 flow [2024-11-10 18:19:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-11-10 18:19:25,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-10 18:19:25,396 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 147 flow. Second operand 7 states and 175 transitions. [2024-11-10 18:19:25,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 241 flow [2024-11-10 18:19:25,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:19:25,398 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 158 flow [2024-11-10 18:19:25,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-10 18:19:25,398 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-10 18:19:25,399 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 158 flow [2024-11-10 18:19:25,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:25,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:25,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:25,417 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 18:19:25,603 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 18:19:25,604 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:25,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash -418575901, now seen corresponding path program 1 times [2024-11-10 18:19:25,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:25,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692396812] [2024-11-10 18:19:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:25,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:25,694 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 18:19:25,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:25,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692396812] [2024-11-10 18:19:25,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692396812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:25,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:25,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:19:25,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130168126] [2024-11-10 18:19:25,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:25,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:19:25,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:19:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:19:25,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:25,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:25,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:25,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:25,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:26,123 INFO L124 PetriNetUnfolderBase]: 2972/4674 cut-off events. [2024-11-10 18:19:26,123 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-10 18:19:26,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8999 conditions, 4674 events. 2972/4674 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32491 event pairs, 2534 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 8966. Up to 4221 conditions per place. [2024-11-10 18:19:26,150 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 43 selfloop transitions, 4 changer transitions 4/64 dead transitions. [2024-11-10 18:19:26,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 274 flow [2024-11-10 18:19:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-10 18:19:26,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-10 18:19:26,151 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 158 flow. Second operand 4 states and 133 transitions. [2024-11-10 18:19:26,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 274 flow [2024-11-10 18:19:26,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 243 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 18:19:26,153 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 152 flow [2024-11-10 18:19:26,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-11-10 18:19:26,154 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2024-11-10 18:19:26,154 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 152 flow [2024-11-10 18:19:26,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:26,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:26,155 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:26,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:19:26,155 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:26,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1848338355, now seen corresponding path program 1 times [2024-11-10 18:19:26,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:26,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360050027] [2024-11-10 18:19:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:26,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:26,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360050027] [2024-11-10 18:19:26,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360050027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:26,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232780888] [2024-11-10 18:19:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:26,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:26,345 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 18:19:26,346 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 18:19:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:26,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:19:26,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:26,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:26,533 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:19:26,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-10 18:19:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:26,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:26,641 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 18:19:26,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232780888] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:26,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:19:26,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-10 18:19:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189208881] [2024-11-10 18:19:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:26,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:19:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:19:26,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:19:26,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:26,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:26,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:26,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:26,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:27,085 INFO L124 PetriNetUnfolderBase]: 2971/4668 cut-off events. [2024-11-10 18:19:27,086 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2024-11-10 18:19:27,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8984 conditions, 4668 events. 2971/4668 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 32538 event pairs, 2534 based on Foata normal form. 1/2713 useless extension candidates. Maximal degree in co-relation 8948. Up to 4219 conditions per place. [2024-11-10 18:19:27,110 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 42 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-10 18:19:27,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 248 flow [2024-11-10 18:19:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:19:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:19:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-10 18:19:27,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-11-10 18:19:27,111 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 152 flow. Second operand 5 states and 147 transitions. [2024-11-10 18:19:27,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 248 flow [2024-11-10 18:19:27,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 238 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:27,113 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 156 flow [2024-11-10 18:19:27,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-10 18:19:27,114 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-10 18:19:27,114 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 156 flow [2024-11-10 18:19:27,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:27,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:27,115 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:27,129 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 18:19:27,315 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 18:19:27,316 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:27,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1928590747, now seen corresponding path program 1 times [2024-11-10 18:19:27,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:27,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058962582] [2024-11-10 18:19:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:27,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058962582] [2024-11-10 18:19:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058962582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818523512] [2024-11-10 18:19:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:27,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:27,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:27,432 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 18:19:27,436 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 18:19:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:27,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:19:27,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:27,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:27,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818523512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:27,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:27,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:19:27,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527311104] [2024-11-10 18:19:27,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:27,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:27,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:27,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:27,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:27,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:27,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 21.642857142857142) internal successors, (303), 14 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:27,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:27,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:27,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:28,499 INFO L124 PetriNetUnfolderBase]: 5941/9335 cut-off events. [2024-11-10 18:19:28,500 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-11-10 18:19:28,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17960 conditions, 9335 events. 5941/9335 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 69303 event pairs, 5068 based on Foata normal form. 1/5460 useless extension candidates. Maximal degree in co-relation 8960. Up to 4217 conditions per place. [2024-11-10 18:19:28,539 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 74 selfloop transitions, 19 changer transitions 0/106 dead transitions. [2024-11-10 18:19:28,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 463 flow [2024-11-10 18:19:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:19:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:19:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2024-11-10 18:19:28,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-11-10 18:19:28,541 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 156 flow. Second operand 10 states and 294 transitions. [2024-11-10 18:19:28,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 463 flow [2024-11-10 18:19:28,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 106 transitions, 449 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:19:28,543 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 243 flow [2024-11-10 18:19:28,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=243, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-11-10 18:19:28,544 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2024-11-10 18:19:28,544 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 243 flow [2024-11-10 18:19:28,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.642857142857142) internal successors, (303), 14 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:28,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:28,545 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:19:28,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:19:28,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:28,746 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:28,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1219333253, now seen corresponding path program 2 times [2024-11-10 18:19:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:28,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725032933] [2024-11-10 18:19:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:28,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:28,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:28,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725032933] [2024-11-10 18:19:28,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725032933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:28,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451881278] [2024-11-10 18:19:28,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:28,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:28,995 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 18:19:28,996 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 18:19:29,058 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:19:29,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:29,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 18:19:29,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:29,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:29,199 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:19:29,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-10 18:19:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:29,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:29,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451881278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:29,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:29,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-10 18:19:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723290244] [2024-11-10 18:19:29,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:29,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 18:19:29,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 18:19:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-10 18:19:29,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:19:29,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 243 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:29,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:29,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:19:29,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:31,500 INFO L124 PetriNetUnfolderBase]: 8911/14004 cut-off events. [2024-11-10 18:19:31,500 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2024-11-10 18:19:31,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26987 conditions, 14004 events. 8911/14004 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 106589 event pairs, 7602 based on Foata normal form. 4/8212 useless extension candidates. Maximal degree in co-relation 8975. Up to 4221 conditions per place. [2024-11-10 18:19:31,577 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 123 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-11-10 18:19:31,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 155 transitions, 783 flow [2024-11-10 18:19:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:19:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:19:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 399 transitions. [2024-11-10 18:19:31,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-11-10 18:19:31,579 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 243 flow. Second operand 14 states and 399 transitions. [2024-11-10 18:19:31,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 155 transitions, 783 flow [2024-11-10 18:19:31,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 155 transitions, 751 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-10 18:19:31,582 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 342 flow [2024-11-10 18:19:31,582 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=342, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2024-11-10 18:19:31,583 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 22 predicate places. [2024-11-10 18:19:31,583 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 342 flow [2024-11-10 18:19:31,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:31,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:31,584 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:31,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:19:31,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:31,784 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:31,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:31,785 INFO L85 PathProgramCache]: Analyzing trace with hash -792002998, now seen corresponding path program 1 times [2024-11-10 18:19:31,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:31,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225794933] [2024-11-10 18:19:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:31,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:31,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:31,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225794933] [2024-11-10 18:19:31,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225794933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:31,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:31,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:19:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374460166] [2024-11-10 18:19:31,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:31,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:19:31,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:19:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:19:31,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:31,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:31,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:31,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:31,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:32,433 INFO L124 PetriNetUnfolderBase]: 6097/9744 cut-off events. [2024-11-10 18:19:32,434 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-11-10 18:19:32,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18728 conditions, 9744 events. 6097/9744 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 71052 event pairs, 5076 based on Foata normal form. 0/6165 useless extension candidates. Maximal degree in co-relation 12497. Up to 8664 conditions per place. [2024-11-10 18:19:32,502 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 49 selfloop transitions, 7 changer transitions 0/75 dead transitions. [2024-11-10 18:19:32,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 448 flow [2024-11-10 18:19:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:19:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:19:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-10 18:19:32,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40285714285714286 [2024-11-10 18:19:32,504 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 342 flow. Second operand 5 states and 141 transitions. [2024-11-10 18:19:32,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 448 flow [2024-11-10 18:19:32,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 75 transitions, 428 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-10 18:19:32,508 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 330 flow [2024-11-10 18:19:32,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-11-10 18:19:32,510 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2024-11-10 18:19:32,510 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 330 flow [2024-11-10 18:19:32,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:32,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:32,510 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:32,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:19:32,510 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:32,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash -792002997, now seen corresponding path program 1 times [2024-11-10 18:19:32,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:32,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532131304] [2024-11-10 18:19:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:32,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532131304] [2024-11-10 18:19:32,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532131304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73398011] [2024-11-10 18:19:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:32,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:32,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:32,724 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:32,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:19:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:32,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 18:19:32,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:32,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:32,801 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 18:19:32,857 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:32,858 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 18:19:32,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-10 18:19:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:33,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73398011] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:33,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:19:33,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 11 [2024-11-10 18:19:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788351065] [2024-11-10 18:19:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:33,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:19:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:33,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:19:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:19:33,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2024-11-10 18:19:33,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:33,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:33,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2024-11-10 18:19:33,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:34,262 INFO L124 PetriNetUnfolderBase]: 7948/12351 cut-off events. [2024-11-10 18:19:34,262 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-10 18:19:34,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23549 conditions, 12351 events. 7948/12351 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 83050 event pairs, 2796 based on Foata normal form. 0/7698 useless extension candidates. Maximal degree in co-relation 15709. Up to 5694 conditions per place. [2024-11-10 18:19:34,339 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 64 selfloop transitions, 16 changer transitions 0/99 dead transitions. [2024-11-10 18:19:34,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 99 transitions, 544 flow [2024-11-10 18:19:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-10 18:19:34,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4448979591836735 [2024-11-10 18:19:34,341 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 330 flow. Second operand 7 states and 218 transitions. [2024-11-10 18:19:34,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 99 transitions, 544 flow [2024-11-10 18:19:34,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:19:34,343 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 384 flow [2024-11-10 18:19:34,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-11-10 18:19:34,344 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2024-11-10 18:19:34,344 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 384 flow [2024-11-10 18:19:34,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:34,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:34,345 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:34,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:19:34,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:34,549 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:34,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash -792002996, now seen corresponding path program 1 times [2024-11-10 18:19:34,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:34,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261933577] [2024-11-10 18:19:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:34,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:34,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261933577] [2024-11-10 18:19:34,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261933577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:34,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:34,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:19:34,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611348583] [2024-11-10 18:19:34,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:34,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:19:34,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:19:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:19:34,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:34,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:34,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:34,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:34,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:35,115 INFO L124 PetriNetUnfolderBase]: 5083/8496 cut-off events. [2024-11-10 18:19:35,115 INFO L125 PetriNetUnfolderBase]: For 4048/4048 co-relation queries the response was YES. [2024-11-10 18:19:35,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19432 conditions, 8496 events. 5083/8496 cut-off events. For 4048/4048 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 61342 event pairs, 3720 based on Foata normal form. 0/6102 useless extension candidates. Maximal degree in co-relation 12963. Up to 7020 conditions per place. [2024-11-10 18:19:35,171 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 52 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-11-10 18:19:35,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 75 transitions, 482 flow [2024-11-10 18:19:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:19:35,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:19:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-10 18:19:35,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-11-10 18:19:35,174 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 384 flow. Second operand 4 states and 118 transitions. [2024-11-10 18:19:35,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 75 transitions, 482 flow [2024-11-10 18:19:35,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:19:35,179 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 361 flow [2024-11-10 18:19:35,179 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-10 18:19:35,180 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 20 predicate places. [2024-11-10 18:19:35,180 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 361 flow [2024-11-10 18:19:35,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:35,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:35,181 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:35,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:19:35,181 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:35,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:35,182 INFO L85 PathProgramCache]: Analyzing trace with hash -792002995, now seen corresponding path program 1 times [2024-11-10 18:19:35,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:35,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076512430] [2024-11-10 18:19:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:35,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:35,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076512430] [2024-11-10 18:19:35,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076512430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804747804] [2024-11-10 18:19:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:35,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:35,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:35,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:19:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:35,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:19:35,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:35,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:35,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:19:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:35,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804747804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:35,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 18:19:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599239402] [2024-11-10 18:19:35,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:35,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 18:19:35,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 18:19:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:19:35,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2024-11-10 18:19:35,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 361 flow. Second operand has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:35,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:35,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2024-11-10 18:19:35,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:36,515 INFO L124 PetriNetUnfolderBase]: 5443/8970 cut-off events. [2024-11-10 18:19:36,515 INFO L125 PetriNetUnfolderBase]: For 3852/3852 co-relation queries the response was YES. [2024-11-10 18:19:36,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20800 conditions, 8970 events. 5443/8970 cut-off events. For 3852/3852 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 63113 event pairs, 1644 based on Foata normal form. 0/6765 useless extension candidates. Maximal degree in co-relation 13874. Up to 5010 conditions per place. [2024-11-10 18:19:36,577 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 75 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-11-10 18:19:36,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 623 flow [2024-11-10 18:19:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 231 transitions. [2024-11-10 18:19:36,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-10 18:19:36,582 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 361 flow. Second operand 7 states and 231 transitions. [2024-11-10 18:19:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 623 flow [2024-11-10 18:19:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 618 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:36,588 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 390 flow [2024-11-10 18:19:36,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2024-11-10 18:19:36,588 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2024-11-10 18:19:36,588 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 390 flow [2024-11-10 18:19:36,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.666666666666668) internal successors, (284), 12 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:36,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:36,589 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-10 18:19:36,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:36,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:36,790 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:36,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1675626909, now seen corresponding path program 3 times [2024-11-10 18:19:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:36,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121205060] [2024-11-10 18:19:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:36,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:36,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:36,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121205060] [2024-11-10 18:19:36,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121205060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:36,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092713930] [2024-11-10 18:19:36,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:19:36,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:36,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:36,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:36,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:19:37,011 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:19:37,012 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:37,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:19:37,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:37,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:37,133 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:19:37,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-10 18:19:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:19:37,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:19:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092713930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:37,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:37,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-10 18:19:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725083324] [2024-11-10 18:19:37,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:37,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 18:19:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 18:19:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-10 18:19:37,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:19:37,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 390 flow. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:37,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:37,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:19:37,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:39,128 INFO L124 PetriNetUnfolderBase]: 5442/8929 cut-off events. [2024-11-10 18:19:39,128 INFO L125 PetriNetUnfolderBase]: For 8290/8290 co-relation queries the response was YES. [2024-11-10 18:19:39,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22049 conditions, 8929 events. 5442/8929 cut-off events. For 8290/8290 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 64428 event pairs, 4260 based on Foata normal form. 3/6974 useless extension candidates. Maximal degree in co-relation 14735. Up to 5092 conditions per place. [2024-11-10 18:19:39,182 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 67 selfloop transitions, 31 changer transitions 0/110 dead transitions. [2024-11-10 18:19:39,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 714 flow [2024-11-10 18:19:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 18:19:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 18:19:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 437 transitions. [2024-11-10 18:19:39,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2024-11-10 18:19:39,184 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 390 flow. Second operand 19 states and 437 transitions. [2024-11-10 18:19:39,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 714 flow [2024-11-10 18:19:39,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 110 transitions, 660 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-10 18:19:39,190 INFO L231 Difference]: Finished difference. Result has 101 places, 77 transitions, 438 flow [2024-11-10 18:19:39,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=438, PETRI_PLACES=101, PETRI_TRANSITIONS=77} [2024-11-10 18:19:39,190 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 35 predicate places. [2024-11-10 18:19:39,191 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 77 transitions, 438 flow [2024-11-10 18:19:39,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:39,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:39,191 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:39,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:39,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:39,394 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:39,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1326523740, now seen corresponding path program 1 times [2024-11-10 18:19:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:39,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019311578] [2024-11-10 18:19:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:39,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:39,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019311578] [2024-11-10 18:19:39,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019311578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:39,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604502481] [2024-11-10 18:19:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:39,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:39,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:19:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:39,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:19:39,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:39,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:39,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604502481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:39,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:39,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:19:39,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874874869] [2024-11-10 18:19:39,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:39,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:39,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:39,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:19:39,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 77 transitions, 438 flow. Second operand has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 14 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:39,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:39,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:19:39,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:40,409 INFO L124 PetriNetUnfolderBase]: 5920/9159 cut-off events. [2024-11-10 18:19:40,409 INFO L125 PetriNetUnfolderBase]: For 5200/5200 co-relation queries the response was YES. [2024-11-10 18:19:40,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21883 conditions, 9159 events. 5920/9159 cut-off events. For 5200/5200 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 60360 event pairs, 3754 based on Foata normal form. 0/6935 useless extension candidates. Maximal degree in co-relation 8737. Up to 5937 conditions per place. [2024-11-10 18:19:40,465 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 109 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-11-10 18:19:40,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 945 flow [2024-11-10 18:19:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:19:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:19:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2024-11-10 18:19:40,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4157142857142857 [2024-11-10 18:19:40,467 INFO L175 Difference]: Start difference. First operand has 101 places, 77 transitions, 438 flow. Second operand 10 states and 291 transitions. [2024-11-10 18:19:40,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 945 flow [2024-11-10 18:19:40,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 872 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-11-10 18:19:40,471 INFO L231 Difference]: Finished difference. Result has 100 places, 80 transitions, 448 flow [2024-11-10 18:19:40,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2024-11-10 18:19:40,472 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2024-11-10 18:19:40,472 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 448 flow [2024-11-10 18:19:40,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 14 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:40,472 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:40,472 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:40,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:40,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-10 18:19:40,673 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:40,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash -677089740, now seen corresponding path program 1 times [2024-11-10 18:19:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:40,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265008135] [2024-11-10 18:19:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:40,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:40,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:40,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265008135] [2024-11-10 18:19:40,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265008135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:40,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:19:40,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:19:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880051451] [2024-11-10 18:19:40,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:40,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 18:19:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 18:19:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:19:41,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:19:41,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 448 flow. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:41,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:41,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:19:41,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:41,749 INFO L124 PetriNetUnfolderBase]: 5592/9317 cut-off events. [2024-11-10 18:19:41,749 INFO L125 PetriNetUnfolderBase]: For 5745/5745 co-relation queries the response was YES. [2024-11-10 18:19:41,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 9317 events. 5592/9317 cut-off events. For 5745/5745 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 65984 event pairs, 2397 based on Foata normal form. 0/7222 useless extension candidates. Maximal degree in co-relation 10318. Up to 4464 conditions per place. [2024-11-10 18:19:41,801 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 78 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-11-10 18:19:41,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 103 transitions, 718 flow [2024-11-10 18:19:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:19:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:19:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-11-10 18:19:41,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-11-10 18:19:41,803 INFO L175 Difference]: Start difference. First operand has 100 places, 80 transitions, 448 flow. Second operand 6 states and 164 transitions. [2024-11-10 18:19:41,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 103 transitions, 718 flow [2024-11-10 18:19:41,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 691 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 18:19:41,809 INFO L231 Difference]: Finished difference. Result has 102 places, 83 transitions, 472 flow [2024-11-10 18:19:41,809 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=102, PETRI_TRANSITIONS=83} [2024-11-10 18:19:41,810 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 36 predicate places. [2024-11-10 18:19:41,810 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 83 transitions, 472 flow [2024-11-10 18:19:41,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:41,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:41,810 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:41,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:19:41,810 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:41,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -677089738, now seen corresponding path program 1 times [2024-11-10 18:19:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:41,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646999953] [2024-11-10 18:19:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:41,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:41,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646999953] [2024-11-10 18:19:41,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646999953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:41,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033821847] [2024-11-10 18:19:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:41,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:42,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:42,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:19:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:42,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 18:19:42,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:42,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:42,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-10 18:19:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:19:42,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033821847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:42,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:42,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-10 18:19:42,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151525968] [2024-11-10 18:19:42,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:42,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 18:19:42,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 18:19:42,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-10 18:19:42,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-11-10 18:19:42,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 83 transitions, 472 flow. Second operand has 21 states, 21 states have (on average 21.285714285714285) internal successors, (447), 21 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:42,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:42,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-11-10 18:19:42,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:43,839 INFO L124 PetriNetUnfolderBase]: 7012/10612 cut-off events. [2024-11-10 18:19:43,839 INFO L125 PetriNetUnfolderBase]: For 10687/10687 co-relation queries the response was YES. [2024-11-10 18:19:43,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30325 conditions, 10612 events. 7012/10612 cut-off events. For 10687/10687 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 71347 event pairs, 4397 based on Foata normal form. 0/8590 useless extension candidates. Maximal degree in co-relation 13458. Up to 6778 conditions per place. [2024-11-10 18:19:43,916 INFO L140 encePairwiseOnDemand]: 56/70 looper letters, 147 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2024-11-10 18:19:43,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 190 transitions, 1308 flow [2024-11-10 18:19:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 18:19:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 18:19:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 504 transitions. [2024-11-10 18:19:43,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2024-11-10 18:19:43,921 INFO L175 Difference]: Start difference. First operand has 102 places, 83 transitions, 472 flow. Second operand 19 states and 504 transitions. [2024-11-10 18:19:43,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 190 transitions, 1308 flow [2024-11-10 18:19:43,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 1297 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:19:43,934 INFO L231 Difference]: Finished difference. Result has 122 places, 91 transitions, 603 flow [2024-11-10 18:19:43,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=603, PETRI_PLACES=122, PETRI_TRANSITIONS=91} [2024-11-10 18:19:43,935 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 56 predicate places. [2024-11-10 18:19:43,935 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 91 transitions, 603 flow [2024-11-10 18:19:43,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.285714285714285) internal successors, (447), 21 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:43,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:43,936 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:43,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:44,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 18:19:44,136 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:44,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1558781543, now seen corresponding path program 1 times [2024-11-10 18:19:44,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:44,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351464657] [2024-11-10 18:19:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:44,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:44,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:44,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351464657] [2024-11-10 18:19:44,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351464657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:44,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697790550] [2024-11-10 18:19:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:44,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:44,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:44,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:19:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:44,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:19:44,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:44,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:44,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697790550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:44,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:44,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:19:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987425929] [2024-11-10 18:19:44,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:44,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:44,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:19:44,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 91 transitions, 603 flow. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:44,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:44,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:19:44,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:45,604 INFO L124 PetriNetUnfolderBase]: 7738/12034 cut-off events. [2024-11-10 18:19:45,605 INFO L125 PetriNetUnfolderBase]: For 18521/18661 co-relation queries the response was YES. [2024-11-10 18:19:45,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36239 conditions, 12034 events. 7738/12034 cut-off events. For 18521/18661 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 82001 event pairs, 4414 based on Foata normal form. 66/10181 useless extension candidates. Maximal degree in co-relation 32046. Up to 7685 conditions per place. [2024-11-10 18:19:45,666 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 139 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-11-10 18:19:45,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 180 transitions, 1374 flow [2024-11-10 18:19:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:19:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:19:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 352 transitions. [2024-11-10 18:19:45,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-11-10 18:19:45,668 INFO L175 Difference]: Start difference. First operand has 122 places, 91 transitions, 603 flow. Second operand 12 states and 352 transitions. [2024-11-10 18:19:45,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 180 transitions, 1374 flow [2024-11-10 18:19:45,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 180 transitions, 1344 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-10 18:19:45,711 INFO L231 Difference]: Finished difference. Result has 129 places, 97 transitions, 674 flow [2024-11-10 18:19:45,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=674, PETRI_PLACES=129, PETRI_TRANSITIONS=97} [2024-11-10 18:19:45,712 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 63 predicate places. [2024-11-10 18:19:45,712 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 97 transitions, 674 flow [2024-11-10 18:19:45,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:45,712 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:45,712 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:45,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:45,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 18:19:45,917 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:45,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1177413852, now seen corresponding path program 2 times [2024-11-10 18:19:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:45,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919988098] [2024-11-10 18:19:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:45,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:46,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919988098] [2024-11-10 18:19:46,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919988098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302657117] [2024-11-10 18:19:46,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:46,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:46,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:46,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:19:46,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:19:46,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:46,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 18:19:46,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:46,208 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 18:19:46,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:46,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:19:46,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:19:46,319 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:46,320 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 18:19:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 18:19:46,489 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:19:46,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302657117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:19:46,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:19:46,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2024-11-10 18:19:46,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901116967] [2024-11-10 18:19:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:19:46,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:19:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:19:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:19:46,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-11-10 18:19:46,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 97 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:46,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:46,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-11-10 18:19:46,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:47,936 INFO L124 PetriNetUnfolderBase]: 9301/14454 cut-off events. [2024-11-10 18:19:47,937 INFO L125 PetriNetUnfolderBase]: For 30032/30282 co-relation queries the response was YES. [2024-11-10 18:19:48,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46802 conditions, 14454 events. 9301/14454 cut-off events. For 30032/30282 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 98791 event pairs, 3413 based on Foata normal form. 6/12280 useless extension candidates. Maximal degree in co-relation 41245. Up to 8211 conditions per place. [2024-11-10 18:19:48,067 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 121 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-11-10 18:19:48,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 156 transitions, 1299 flow [2024-11-10 18:19:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:19:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:19:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-11-10 18:19:48,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42244897959183675 [2024-11-10 18:19:48,068 INFO L175 Difference]: Start difference. First operand has 129 places, 97 transitions, 674 flow. Second operand 7 states and 207 transitions. [2024-11-10 18:19:48,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 156 transitions, 1299 flow [2024-11-10 18:19:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 156 transitions, 1268 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-10 18:19:48,096 INFO L231 Difference]: Finished difference. Result has 132 places, 100 transitions, 697 flow [2024-11-10 18:19:48,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=697, PETRI_PLACES=132, PETRI_TRANSITIONS=100} [2024-11-10 18:19:48,096 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 66 predicate places. [2024-11-10 18:19:48,096 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 100 transitions, 697 flow [2024-11-10 18:19:48,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:48,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:48,097 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:48,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 18:19:48,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 18:19:48,297 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:48,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1177413854, now seen corresponding path program 1 times [2024-11-10 18:19:48,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:48,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279294097] [2024-11-10 18:19:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:19:48,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:48,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279294097] [2024-11-10 18:19:48,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279294097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:48,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702256340] [2024-11-10 18:19:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:48,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:48,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:48,534 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:48,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:19:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:48,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 18:19:48,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:48,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:48,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:19:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:48,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702256340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:48,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:48,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2024-11-10 18:19:48,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119590480] [2024-11-10 18:19:48,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:48,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 18:19:48,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:48,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 18:19:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-10 18:19:49,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 100 transitions, 697 flow. Second operand has 20 states, 20 states have (on average 22.2) internal successors, (444), 20 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:49,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:49,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:50,679 INFO L124 PetriNetUnfolderBase]: 8819/14661 cut-off events. [2024-11-10 18:19:50,679 INFO L125 PetriNetUnfolderBase]: For 32640/33308 co-relation queries the response was YES. [2024-11-10 18:19:50,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48996 conditions, 14661 events. 8819/14661 cut-off events. For 32640/33308 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 107900 event pairs, 2694 based on Foata normal form. 346/13783 useless extension candidates. Maximal degree in co-relation 43222. Up to 5488 conditions per place. [2024-11-10 18:19:50,791 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 140 selfloop transitions, 23 changer transitions 0/180 dead transitions. [2024-11-10 18:19:50,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 180 transitions, 1450 flow [2024-11-10 18:19:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:19:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:19:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 407 transitions. [2024-11-10 18:19:50,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4153061224489796 [2024-11-10 18:19:50,792 INFO L175 Difference]: Start difference. First operand has 132 places, 100 transitions, 697 flow. Second operand 14 states and 407 transitions. [2024-11-10 18:19:50,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 180 transitions, 1450 flow [2024-11-10 18:19:50,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 180 transitions, 1429 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-10 18:19:50,845 INFO L231 Difference]: Finished difference. Result has 144 places, 102 transitions, 753 flow [2024-11-10 18:19:50,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=753, PETRI_PLACES=144, PETRI_TRANSITIONS=102} [2024-11-10 18:19:50,845 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 78 predicate places. [2024-11-10 18:19:50,845 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 102 transitions, 753 flow [2024-11-10 18:19:50,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.2) internal successors, (444), 20 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:50,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:50,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:50,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:51,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:19:51,047 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:51,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:51,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2018621392, now seen corresponding path program 1 times [2024-11-10 18:19:51,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:51,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839131647] [2024-11-10 18:19:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:51,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:51,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:51,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839131647] [2024-11-10 18:19:51,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839131647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:51,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829556220] [2024-11-10 18:19:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:51,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:51,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:51,132 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:51,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 18:19:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:51,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:19:51,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:51,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:19:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829556220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:51,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-10 18:19:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949936969] [2024-11-10 18:19:51,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:51,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:19:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:19:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:19:51,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:19:51,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 102 transitions, 753 flow. Second operand has 15 states, 15 states have (on average 20.6) internal successors, (309), 15 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:51,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:51,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:19:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:53,874 INFO L124 PetriNetUnfolderBase]: 12585/19061 cut-off events. [2024-11-10 18:19:53,875 INFO L125 PetriNetUnfolderBase]: For 52572/53600 co-relation queries the response was YES. [2024-11-10 18:19:53,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69149 conditions, 19061 events. 12585/19061 cut-off events. For 52572/53600 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 130621 event pairs, 7382 based on Foata normal form. 790/18905 useless extension candidates. Maximal degree in co-relation 62406. Up to 13465 conditions per place. [2024-11-10 18:19:54,006 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 113 selfloop transitions, 29 changer transitions 0/156 dead transitions. [2024-11-10 18:19:54,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 156 transitions, 1333 flow [2024-11-10 18:19:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:19:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:19:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-11-10 18:19:54,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-10 18:19:54,007 INFO L175 Difference]: Start difference. First operand has 144 places, 102 transitions, 753 flow. Second operand 11 states and 308 transitions. [2024-11-10 18:19:54,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 156 transitions, 1333 flow [2024-11-10 18:19:54,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 156 transitions, 1286 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-11-10 18:19:54,068 INFO L231 Difference]: Finished difference. Result has 145 places, 102 transitions, 793 flow [2024-11-10 18:19:54,068 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=793, PETRI_PLACES=145, PETRI_TRANSITIONS=102} [2024-11-10 18:19:54,068 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 79 predicate places. [2024-11-10 18:19:54,068 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 102 transitions, 793 flow [2024-11-10 18:19:54,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.6) internal successors, (309), 15 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:54,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:54,069 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:54,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:54,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:54,273 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:54,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1633845601, now seen corresponding path program 2 times [2024-11-10 18:19:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777040323] [2024-11-10 18:19:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:54,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777040323] [2024-11-10 18:19:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777040323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614894020] [2024-11-10 18:19:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:54,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:54,436 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:54,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 18:19:54,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:19:54,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:54,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:19:54,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:54,521 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 18:19:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:19:54,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:19:54,577 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:54,577 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 18:19:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:54,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:54,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:19:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:54,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614894020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:54,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:54,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-10 18:19:54,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220617262] [2024-11-10 18:19:54,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:54,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:19:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:19:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:19:55,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:19:55,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 102 transitions, 793 flow. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:55,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:55,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:19:55,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:57,740 INFO L124 PetriNetUnfolderBase]: 11680/18952 cut-off events. [2024-11-10 18:19:57,740 INFO L125 PetriNetUnfolderBase]: For 57165/58681 co-relation queries the response was YES. [2024-11-10 18:19:57,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69023 conditions, 18952 events. 11680/18952 cut-off events. For 57165/58681 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 141316 event pairs, 3109 based on Foata normal form. 1007/18921 useless extension candidates. Maximal degree in co-relation 60085. Up to 6184 conditions per place. [2024-11-10 18:19:57,889 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 152 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-11-10 18:19:57,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 201 transitions, 1736 flow [2024-11-10 18:19:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:19:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:19:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 397 transitions. [2024-11-10 18:19:57,891 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43626373626373627 [2024-11-10 18:19:57,891 INFO L175 Difference]: Start difference. First operand has 145 places, 102 transitions, 793 flow. Second operand 13 states and 397 transitions. [2024-11-10 18:19:57,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 201 transitions, 1736 flow [2024-11-10 18:19:57,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 201 transitions, 1693 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-10 18:19:57,984 INFO L231 Difference]: Finished difference. Result has 153 places, 107 transitions, 860 flow [2024-11-10 18:19:57,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=860, PETRI_PLACES=153, PETRI_TRANSITIONS=107} [2024-11-10 18:19:57,985 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 87 predicate places. [2024-11-10 18:19:57,985 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 107 transitions, 860 flow [2024-11-10 18:19:57,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:57,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:57,985 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:58,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-10 18:19:58,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:58,186 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:19:58,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1633845599, now seen corresponding path program 1 times [2024-11-10 18:19:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147017663] [2024-11-10 18:19:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:19:58,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147017663] [2024-11-10 18:19:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147017663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:58,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221420387] [2024-11-10 18:19:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:58,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:58,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:58,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:58,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 18:19:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:58,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 18:19:58,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:58,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:58,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-10 18:19:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:58,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221420387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:58,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:58,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2024-11-10 18:19:58,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605540495] [2024-11-10 18:19:58,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:58,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 18:19:58,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 18:19:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-11-10 18:19:59,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-11-10 18:19:59,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 107 transitions, 860 flow. Second operand has 24 states, 24 states have (on average 21.125) internal successors, (507), 24 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:59,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:59,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-11-10 18:19:59,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:02,308 INFO L124 PetriNetUnfolderBase]: 13620/21145 cut-off events. [2024-11-10 18:20:02,309 INFO L125 PetriNetUnfolderBase]: For 73854/75324 co-relation queries the response was YES. [2024-11-10 18:20:02,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83424 conditions, 21145 events. 13620/21145 cut-off events. For 73854/75324 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 149341 event pairs, 4101 based on Foata normal form. 781/20346 useless extension candidates. Maximal degree in co-relation 58760. Up to 8688 conditions per place. [2024-11-10 18:20:02,496 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 162 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-11-10 18:20:02,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 203 transitions, 1792 flow [2024-11-10 18:20:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:20:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:20:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 410 transitions. [2024-11-10 18:20:02,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-11-10 18:20:02,498 INFO L175 Difference]: Start difference. First operand has 153 places, 107 transitions, 860 flow. Second operand 14 states and 410 transitions. [2024-11-10 18:20:02,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 203 transitions, 1792 flow [2024-11-10 18:20:02,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 203 transitions, 1751 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-10 18:20:02,575 INFO L231 Difference]: Finished difference. Result has 157 places, 106 transitions, 860 flow [2024-11-10 18:20:02,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=860, PETRI_PLACES=157, PETRI_TRANSITIONS=106} [2024-11-10 18:20:02,575 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 91 predicate places. [2024-11-10 18:20:02,576 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 106 transitions, 860 flow [2024-11-10 18:20:02,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 21.125) internal successors, (507), 24 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:02,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:02,576 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:02,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:02,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:02,781 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:02,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 425250414, now seen corresponding path program 2 times [2024-11-10 18:20:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022452351] [2024-11-10 18:20:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 18:20:02,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022452351] [2024-11-10 18:20:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022452351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127481049] [2024-11-10 18:20:02,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:02,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:02,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:02,963 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:02,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 18:20:03,052 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:20:03,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:03,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-10 18:20:03,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:03,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:20:03,064 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 18:20:03,128 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:20:03,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-10 18:20:03,140 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:03,141 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 18:20:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 18:20:03,402 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:20:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127481049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:03,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:20:03,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2024-11-10 18:20:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064293327] [2024-11-10 18:20:03,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:03,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:20:03,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:20:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:03,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:20:03,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 106 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:03,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:03,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:20:03,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:05,559 INFO L124 PetriNetUnfolderBase]: 9124/16318 cut-off events. [2024-11-10 18:20:05,559 INFO L125 PetriNetUnfolderBase]: For 62304/63088 co-relation queries the response was YES. [2024-11-10 18:20:05,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64526 conditions, 16318 events. 9124/16318 cut-off events. For 62304/63088 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 130062 event pairs, 2470 based on Foata normal form. 1312/17470 useless extension candidates. Maximal degree in co-relation 48424. Up to 7249 conditions per place. [2024-11-10 18:20:05,681 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 98 selfloop transitions, 13 changer transitions 0/136 dead transitions. [2024-11-10 18:20:05,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 136 transitions, 1322 flow [2024-11-10 18:20:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:20:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:20:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-11-10 18:20:05,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-11-10 18:20:05,682 INFO L175 Difference]: Start difference. First operand has 157 places, 106 transitions, 860 flow. Second operand 6 states and 170 transitions. [2024-11-10 18:20:05,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 136 transitions, 1322 flow [2024-11-10 18:20:05,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1252 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-11-10 18:20:05,732 INFO L231 Difference]: Finished difference. Result has 148 places, 104 transitions, 823 flow [2024-11-10 18:20:05,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=823, PETRI_PLACES=148, PETRI_TRANSITIONS=104} [2024-11-10 18:20:05,732 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 82 predicate places. [2024-11-10 18:20:05,733 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 104 transitions, 823 flow [2024-11-10 18:20:05,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:05,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:05,733 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:05,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:05,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-10 18:20:05,933 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:05,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:05,934 INFO L85 PathProgramCache]: Analyzing trace with hash 986184568, now seen corresponding path program 1 times [2024-11-10 18:20:05,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:05,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909441466] [2024-11-10 18:20:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:05,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:06,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909441466] [2024-11-10 18:20:06,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909441466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:06,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543396462] [2024-11-10 18:20:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:06,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:06,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:06,065 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:06,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 18:20:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:06,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:20:06,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:06,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:06,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543396462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:06,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:06,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-10 18:20:06,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114791342] [2024-11-10 18:20:06,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:06,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 18:20:06,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:06,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 18:20:06,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-10 18:20:06,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:20:06,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 104 transitions, 823 flow. Second operand has 19 states, 19 states have (on average 20.36842105263158) internal successors, (387), 19 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:06,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:06,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:20:06,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:08,707 INFO L124 PetriNetUnfolderBase]: 10607/16568 cut-off events. [2024-11-10 18:20:08,708 INFO L125 PetriNetUnfolderBase]: For 60691/60717 co-relation queries the response was YES. [2024-11-10 18:20:08,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67866 conditions, 16568 events. 10607/16568 cut-off events. For 60691/60717 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 111518 event pairs, 4799 based on Foata normal form. 146/15985 useless extension candidates. Maximal degree in co-relation 64232. Up to 7471 conditions per place. [2024-11-10 18:20:08,841 INFO L140 encePairwiseOnDemand]: 56/70 looper letters, 206 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-11-10 18:20:08,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 254 transitions, 2411 flow [2024-11-10 18:20:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 18:20:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 18:20:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 405 transitions. [2024-11-10 18:20:08,842 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2024-11-10 18:20:08,842 INFO L175 Difference]: Start difference. First operand has 148 places, 104 transitions, 823 flow. Second operand 14 states and 405 transitions. [2024-11-10 18:20:08,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 254 transitions, 2411 flow [2024-11-10 18:20:08,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 2343 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 18:20:08,895 INFO L231 Difference]: Finished difference. Result has 159 places, 110 transitions, 935 flow [2024-11-10 18:20:08,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=935, PETRI_PLACES=159, PETRI_TRANSITIONS=110} [2024-11-10 18:20:08,895 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 93 predicate places. [2024-11-10 18:20:08,895 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 110 transitions, 935 flow [2024-11-10 18:20:08,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.36842105263158) internal successors, (387), 19 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:08,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:08,896 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:08,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:09,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:09,096 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:09,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 199965704, now seen corresponding path program 2 times [2024-11-10 18:20:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686290583] [2024-11-10 18:20:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:09,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:09,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686290583] [2024-11-10 18:20:09,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686290583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:09,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625465538] [2024-11-10 18:20:09,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:09,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:09,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:09,332 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:09,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-10 18:20:09,437 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:09,437 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:09,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:20:09,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:09,447 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 18:20:09,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:20:09,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:20:09,535 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:09,535 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 18:20:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 18:20:09,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:10,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2024-11-10 18:20:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 18:20:10,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625465538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:10,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:10,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-10 18:20:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418032495] [2024-11-10 18:20:10,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:10,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-10 18:20:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-10 18:20:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-10 18:20:10,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2024-11-10 18:20:10,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 110 transitions, 935 flow. Second operand has 25 states, 25 states have (on average 18.4) internal successors, (460), 25 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:10,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:10,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2024-11-10 18:20:10,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:12,739 INFO L124 PetriNetUnfolderBase]: 10576/16188 cut-off events. [2024-11-10 18:20:12,739 INFO L125 PetriNetUnfolderBase]: For 72289/73333 co-relation queries the response was YES. [2024-11-10 18:20:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68566 conditions, 16188 events. 10576/16188 cut-off events. For 72289/73333 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 107641 event pairs, 1885 based on Foata normal form. 864/16615 useless extension candidates. Maximal degree in co-relation 64512. Up to 3918 conditions per place. [2024-11-10 18:20:12,906 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 185 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2024-11-10 18:20:12,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2266 flow [2024-11-10 18:20:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:20:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:20:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-11-10 18:20:12,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-10 18:20:12,907 INFO L175 Difference]: Start difference. First operand has 159 places, 110 transitions, 935 flow. Second operand 8 states and 216 transitions. [2024-11-10 18:20:12,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2266 flow [2024-11-10 18:20:12,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 220 transitions, 2196 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-10 18:20:12,977 INFO L231 Difference]: Finished difference. Result has 159 places, 112 transitions, 957 flow [2024-11-10 18:20:12,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=957, PETRI_PLACES=159, PETRI_TRANSITIONS=112} [2024-11-10 18:20:12,977 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 93 predicate places. [2024-11-10 18:20:12,977 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 112 transitions, 957 flow [2024-11-10 18:20:12,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.4) internal successors, (460), 25 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:12,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:12,978 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:12,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-10 18:20:13,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:13,179 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:13,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash 35345597, now seen corresponding path program 2 times [2024-11-10 18:20:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970551521] [2024-11-10 18:20:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:13,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:13,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970551521] [2024-11-10 18:20:13,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970551521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:13,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911869145] [2024-11-10 18:20:13,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:13,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:13,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:13,310 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:13,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-10 18:20:13,395 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:20:13,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:13,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-10 18:20:13,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:13,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:20:13,407 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 18:20:13,466 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:13,466 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 18:20:13,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2024-11-10 18:20:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-10 18:20:13,729 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:20:13,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911869145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:13,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:20:13,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2024-11-10 18:20:13,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946341366] [2024-11-10 18:20:13,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:13,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:20:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:13,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:20:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:13,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:20:13,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 112 transitions, 957 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:13,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:13,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:20:13,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:15,009 INFO L124 PetriNetUnfolderBase]: 5890/10504 cut-off events. [2024-11-10 18:20:15,010 INFO L125 PetriNetUnfolderBase]: For 52475/52719 co-relation queries the response was YES. [2024-11-10 18:20:15,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45550 conditions, 10504 events. 5890/10504 cut-off events. For 52475/52719 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 76985 event pairs, 4179 based on Foata normal form. 325/10412 useless extension candidates. Maximal degree in co-relation 42449. Up to 8038 conditions per place. [2024-11-10 18:20:15,102 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 74 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2024-11-10 18:20:15,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 110 transitions, 1106 flow [2024-11-10 18:20:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-11-10 18:20:15,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-10 18:20:15,103 INFO L175 Difference]: Start difference. First operand has 159 places, 112 transitions, 957 flow. Second operand 5 states and 133 transitions. [2024-11-10 18:20:15,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 110 transitions, 1106 flow [2024-11-10 18:20:15,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 110 transitions, 1076 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-10 18:20:15,164 INFO L231 Difference]: Finished difference. Result has 156 places, 110 transitions, 928 flow [2024-11-10 18:20:15,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=928, PETRI_PLACES=156, PETRI_TRANSITIONS=110} [2024-11-10 18:20:15,165 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 90 predicate places. [2024-11-10 18:20:15,165 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 110 transitions, 928 flow [2024-11-10 18:20:15,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:15,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:15,165 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:15,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:15,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:15,366 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:15,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 35345595, now seen corresponding path program 3 times [2024-11-10 18:20:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:15,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440493398] [2024-11-10 18:20:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:15,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:15,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440493398] [2024-11-10 18:20:15,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440493398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:15,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757952197] [2024-11-10 18:20:15,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:20:15,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:15,478 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-10 18:20:15,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:20:15,554 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:15,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 18:20:15,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:15,561 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 18:20:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:20:15,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:20:15,645 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:15,646 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 18:20:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 18:20:15,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:16,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2024-11-10 18:20:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-10 18:20:16,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757952197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:16,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:16,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-10 18:20:16,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610662889] [2024-11-10 18:20:16,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:16,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-10 18:20:16,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-10 18:20:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-11-10 18:20:16,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2024-11-10 18:20:16,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 110 transitions, 928 flow. Second operand has 25 states, 25 states have (on average 18.36) internal successors, (459), 25 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:16,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:16,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2024-11-10 18:20:16,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:19,835 INFO L124 PetriNetUnfolderBase]: 9066/13930 cut-off events. [2024-11-10 18:20:19,835 INFO L125 PetriNetUnfolderBase]: For 72581/73654 co-relation queries the response was YES. [2024-11-10 18:20:19,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59618 conditions, 13930 events. 9066/13930 cut-off events. For 72581/73654 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 91682 event pairs, 959 based on Foata normal form. 787/14581 useless extension candidates. Maximal degree in co-relation 54276. Up to 1928 conditions per place. [2024-11-10 18:20:19,976 INFO L140 encePairwiseOnDemand]: 55/70 looper letters, 381 selfloop transitions, 59 changer transitions 0/458 dead transitions. [2024-11-10 18:20:19,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 458 transitions, 4488 flow [2024-11-10 18:20:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-10 18:20:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-10 18:20:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 801 transitions. [2024-11-10 18:20:19,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3575892857142857 [2024-11-10 18:20:19,978 INFO L175 Difference]: Start difference. First operand has 156 places, 110 transitions, 928 flow. Second operand 32 states and 801 transitions. [2024-11-10 18:20:19,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 458 transitions, 4488 flow [2024-11-10 18:20:20,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 458 transitions, 4375 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:20:20,042 INFO L231 Difference]: Finished difference. Result has 184 places, 135 transitions, 1219 flow [2024-11-10 18:20:20,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1219, PETRI_PLACES=184, PETRI_TRANSITIONS=135} [2024-11-10 18:20:20,042 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 118 predicate places. [2024-11-10 18:20:20,042 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 135 transitions, 1219 flow [2024-11-10 18:20:20,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.36) internal successors, (459), 25 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:20,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:20,043 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:20,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:20,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-10 18:20:20,243 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:20,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788992, now seen corresponding path program 2 times [2024-11-10 18:20:20,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:20,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084339917] [2024-11-10 18:20:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:20,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:20:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084339917] [2024-11-10 18:20:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084339917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499617237] [2024-11-10 18:20:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:20,549 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:20,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-10 18:20:20,624 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:20,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:20,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 18:20:20,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:20,632 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 18:20:20,695 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:20,695 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 18:20:20,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:20:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:20:20,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:20,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:20:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:20:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499617237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:21,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-11-10 18:20:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024805147] [2024-11-10 18:20:21,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:21,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 18:20:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 18:20:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-10 18:20:25,185 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 18:20:25,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2024-11-10 18:20:25,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 135 transitions, 1219 flow. Second operand has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 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 18:20:25,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:25,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2024-11-10 18:20:25,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:27,787 INFO L124 PetriNetUnfolderBase]: 8321/15640 cut-off events. [2024-11-10 18:20:27,787 INFO L125 PetriNetUnfolderBase]: For 85902/86094 co-relation queries the response was YES. [2024-11-10 18:20:27,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70395 conditions, 15640 events. 8321/15640 cut-off events. For 85902/86094 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 130222 event pairs, 2485 based on Foata normal form. 260/15559 useless extension candidates. Maximal degree in co-relation 65823. Up to 3229 conditions per place. [2024-11-10 18:20:27,945 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 270 selfloop transitions, 36 changer transitions 0/345 dead transitions. [2024-11-10 18:20:27,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 345 transitions, 3664 flow [2024-11-10 18:20:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-10 18:20:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-10 18:20:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 577 transitions. [2024-11-10 18:20:27,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3925170068027211 [2024-11-10 18:20:27,947 INFO L175 Difference]: Start difference. First operand has 184 places, 135 transitions, 1219 flow. Second operand 21 states and 577 transitions. [2024-11-10 18:20:27,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 345 transitions, 3664 flow [2024-11-10 18:20:28,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 345 transitions, 3577 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-11-10 18:20:28,140 INFO L231 Difference]: Finished difference. Result has 198 places, 146 transitions, 1395 flow [2024-11-10 18:20:28,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1395, PETRI_PLACES=198, PETRI_TRANSITIONS=146} [2024-11-10 18:20:28,141 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 132 predicate places. [2024-11-10 18:20:28,141 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 146 transitions, 1395 flow [2024-11-10 18:20:28,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.36842105263158) internal successors, (406), 19 states have internal predecessors, (406), 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 18:20:28,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:28,142 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:28,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-10 18:20:28,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-10 18:20:28,342 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:28,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 198129856, now seen corresponding path program 1 times [2024-11-10 18:20:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:28,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460148253] [2024-11-10 18:20:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:28,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:28,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460148253] [2024-11-10 18:20:28,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460148253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:28,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:28,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:28,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510803060] [2024-11-10 18:20:28,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:28,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:28,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:28,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2024-11-10 18:20:28,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 146 transitions, 1395 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:28,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:28,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2024-11-10 18:20:28,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:30,327 INFO L124 PetriNetUnfolderBase]: 8592/15664 cut-off events. [2024-11-10 18:20:30,328 INFO L125 PetriNetUnfolderBase]: For 106426/107112 co-relation queries the response was YES. [2024-11-10 18:20:30,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74784 conditions, 15664 events. 8592/15664 cut-off events. For 106426/107112 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 125142 event pairs, 2025 based on Foata normal form. 502/15836 useless extension candidates. Maximal degree in co-relation 70132. Up to 10957 conditions per place. [2024-11-10 18:20:30,654 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 129 selfloop transitions, 15 changer transitions 1/184 dead transitions. [2024-11-10 18:20:30,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 184 transitions, 2030 flow [2024-11-10 18:20:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-10 18:20:30,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-10 18:20:30,655 INFO L175 Difference]: Start difference. First operand has 198 places, 146 transitions, 1395 flow. Second operand 3 states and 114 transitions. [2024-11-10 18:20:30,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 184 transitions, 2030 flow [2024-11-10 18:20:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 184 transitions, 1955 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-11-10 18:20:30,781 INFO L231 Difference]: Finished difference. Result has 189 places, 158 transitions, 1516 flow [2024-11-10 18:20:30,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1516, PETRI_PLACES=189, PETRI_TRANSITIONS=158} [2024-11-10 18:20:30,782 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 123 predicate places. [2024-11-10 18:20:30,782 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 158 transitions, 1516 flow [2024-11-10 18:20:30,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:30,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:30,782 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:30,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-10 18:20:30,782 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:30,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash 19795598, now seen corresponding path program 1 times [2024-11-10 18:20:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:30,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530269885] [2024-11-10 18:20:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:30,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 18:20:30,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:30,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530269885] [2024-11-10 18:20:30,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530269885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:30,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:30,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:20:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070886232] [2024-11-10 18:20:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:30,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:30,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:30,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2024-11-10 18:20:30,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 158 transitions, 1516 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:30,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:30,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2024-11-10 18:20:30,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:33,086 INFO L124 PetriNetUnfolderBase]: 11426/19044 cut-off events. [2024-11-10 18:20:33,086 INFO L125 PetriNetUnfolderBase]: For 126339/127412 co-relation queries the response was YES. [2024-11-10 18:20:33,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93483 conditions, 19044 events. 11426/19044 cut-off events. For 126339/127412 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 142485 event pairs, 3813 based on Foata normal form. 1022/19628 useless extension candidates. Maximal degree in co-relation 88410. Up to 7947 conditions per place. [2024-11-10 18:20:33,291 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 172 selfloop transitions, 10 changer transitions 0/215 dead transitions. [2024-11-10 18:20:33,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 215 transitions, 2473 flow [2024-11-10 18:20:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-11-10 18:20:33,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-10 18:20:33,292 INFO L175 Difference]: Start difference. First operand has 189 places, 158 transitions, 1516 flow. Second operand 4 states and 126 transitions. [2024-11-10 18:20:33,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 215 transitions, 2473 flow [2024-11-10 18:20:33,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 215 transitions, 2435 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:33,469 INFO L231 Difference]: Finished difference. Result has 187 places, 154 transitions, 1468 flow [2024-11-10 18:20:33,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1468, PETRI_PLACES=187, PETRI_TRANSITIONS=154} [2024-11-10 18:20:33,469 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2024-11-10 18:20:33,470 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 154 transitions, 1468 flow [2024-11-10 18:20:33,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:33,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:33,470 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:33,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-10 18:20:33,470 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:33,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1285489856, now seen corresponding path program 1 times [2024-11-10 18:20:33,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:33,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241146764] [2024-11-10 18:20:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:33,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:33,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:33,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241146764] [2024-11-10 18:20:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241146764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:33,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000816346] [2024-11-10 18:20:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:33,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:33,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:33,723 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:33,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-10 18:20:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:33,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:20:33,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:33,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:33,871 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 18:20:33,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000816346] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:33,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:20:33,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-10 18:20:33,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977632502] [2024-11-10 18:20:33,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:33,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:20:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:20:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:20:33,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2024-11-10 18:20:33,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 154 transitions, 1468 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 18:20:33,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:33,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2024-11-10 18:20:33,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:35,989 INFO L124 PetriNetUnfolderBase]: 10062/17182 cut-off events. [2024-11-10 18:20:35,989 INFO L125 PetriNetUnfolderBase]: For 117848/118576 co-relation queries the response was YES. [2024-11-10 18:20:36,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82929 conditions, 17182 events. 10062/17182 cut-off events. For 117848/118576 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 127426 event pairs, 3623 based on Foata normal form. 990/17902 useless extension candidates. Maximal degree in co-relation 79593. Up to 7156 conditions per place. [2024-11-10 18:20:36,149 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 149 selfloop transitions, 13 changer transitions 0/178 dead transitions. [2024-11-10 18:20:36,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 178 transitions, 2067 flow [2024-11-10 18:20:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-10 18:20:36,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40285714285714286 [2024-11-10 18:20:36,150 INFO L175 Difference]: Start difference. First operand has 187 places, 154 transitions, 1468 flow. Second operand 5 states and 141 transitions. [2024-11-10 18:20:36,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 178 transitions, 2067 flow [2024-11-10 18:20:36,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 178 transitions, 1999 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-11-10 18:20:36,305 INFO L231 Difference]: Finished difference. Result has 181 places, 136 transitions, 1282 flow [2024-11-10 18:20:36,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1282, PETRI_PLACES=181, PETRI_TRANSITIONS=136} [2024-11-10 18:20:36,305 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 115 predicate places. [2024-11-10 18:20:36,305 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 136 transitions, 1282 flow [2024-11-10 18:20:36,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 18:20:36,306 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:36,306 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:36,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-10 18:20:36,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:36,510 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:36,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1185880568, now seen corresponding path program 3 times [2024-11-10 18:20:36,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:36,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324715684] [2024-11-10 18:20:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:36,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-10 18:20:36,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:36,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324715684] [2024-11-10 18:20:36,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324715684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932912277] [2024-11-10 18:20:36,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:20:36,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:36,679 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:36,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-10 18:20:36,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:20:36,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:36,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-10 18:20:36,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:36,774 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 18:20:36,865 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:20:36,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-10 18:20:36,877 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:36,877 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 18:20:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-10 18:20:37,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:37,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2024-11-10 18:20:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-10 18:20:37,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932912277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:37,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:37,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2024-11-10 18:20:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206875702] [2024-11-10 18:20:37,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:37,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 18:20:37,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:37,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 18:20:37,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2024-11-10 18:20:38,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2024-11-10 18:20:38,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 136 transitions, 1282 flow. Second operand has 28 states, 28 states have (on average 18.5) internal successors, (518), 28 states have internal predecessors, (518), 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 18:20:38,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:38,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2024-11-10 18:20:38,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:42,865 INFO L124 PetriNetUnfolderBase]: 14426/22912 cut-off events. [2024-11-10 18:20:42,865 INFO L125 PetriNetUnfolderBase]: For 135635/135817 co-relation queries the response was YES. [2024-11-10 18:20:43,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108946 conditions, 22912 events. 14426/22912 cut-off events. For 135635/135817 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 162614 event pairs, 1714 based on Foata normal form. 236/23015 useless extension candidates. Maximal degree in co-relation 105462. Up to 3889 conditions per place. [2024-11-10 18:20:43,110 INFO L140 encePairwiseOnDemand]: 56/70 looper letters, 418 selfloop transitions, 67 changer transitions 0/504 dead transitions. [2024-11-10 18:20:43,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 504 transitions, 5451 flow [2024-11-10 18:20:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-10 18:20:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-10 18:20:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 827 transitions. [2024-11-10 18:20:43,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33755102040816326 [2024-11-10 18:20:43,112 INFO L175 Difference]: Start difference. First operand has 181 places, 136 transitions, 1282 flow. Second operand 35 states and 827 transitions. [2024-11-10 18:20:43,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 504 transitions, 5451 flow [2024-11-10 18:20:43,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 504 transitions, 5267 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:20:43,368 INFO L231 Difference]: Finished difference. Result has 211 places, 161 transitions, 1690 flow [2024-11-10 18:20:43,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1690, PETRI_PLACES=211, PETRI_TRANSITIONS=161} [2024-11-10 18:20:43,369 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 145 predicate places. [2024-11-10 18:20:43,369 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 161 transitions, 1690 flow [2024-11-10 18:20:43,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 18.5) internal successors, (518), 28 states have internal predecessors, (518), 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 18:20:43,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:43,370 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, 1, 1, 1, 1, 1] [2024-11-10 18:20:43,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-10 18:20:43,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:43,570 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-10 18:20:43,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:43,571 INFO L85 PathProgramCache]: Analyzing trace with hash -159466678, now seen corresponding path program 1 times [2024-11-10 18:20:43,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:43,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883264738] [2024-11-10 18:20:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:43,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:44,170 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 18:20:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883264738] [2024-11-10 18:20:44,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883264738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266976265] [2024-11-10 18:20:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:44,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:44,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:44,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-10 18:20:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:44,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-10 18:20:44,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:44,260 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 18:20:44,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:20:44,354 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:44,355 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 18:20:44,399 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 15 treesize of output 1 [2024-11-10 18:20:44,789 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 27 treesize of output 11 [2024-11-10 18:20:44,803 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 18:20:44,803 INFO L311 TraceCheckSpWp]: Computing backward predicates...