./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/unroll-5.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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:17:37,212 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:17:37,269 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:17:37,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:17:37,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:17:37,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:17:37,294 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:17:37,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:17:37,294 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:17:37,294 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:17:37,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:17:37,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:17:37,294 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:17:37,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:17:37,294 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:17:37,295 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:17:37,295 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:17:37,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:17:37,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:17:37,296 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2025-03-04 10:17:37,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:17:37,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:17:37,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:17:37,542 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:17:37,542 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:17:37,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-5.wvr.c [2025-03-04 10:17:38,648 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac7dcaf1/7acee7a5b22e4d808ec2c898cfd0c1d8/FLAG963c4b5af [2025-03-04 10:17:38,868 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:17:38,869 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c [2025-03-04 10:17:38,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac7dcaf1/7acee7a5b22e4d808ec2c898cfd0c1d8/FLAG963c4b5af [2025-03-04 10:17:38,918 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac7dcaf1/7acee7a5b22e4d808ec2c898cfd0c1d8 [2025-03-04 10:17:38,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:17:38,922 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:17:38,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:17:38,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:17:38,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:17:38,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:17:38" (1/1) ... [2025-03-04 10:17:38,928 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7b8d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:38, skipping insertion in model container [2025-03-04 10:17:38,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:17:38" (1/1) ... [2025-03-04 10:17:38,944 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:17:39,068 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 10:17:39,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:17:39,076 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:17:39,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:17:39,109 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:17:39,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39 WrapperNode [2025-03-04 10:17:39,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:17:39,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:17:39,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:17:39,112 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:17:39,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,141 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 150 [2025-03-04 10:17:39,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:17:39,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:17:39,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:17:39,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:17:39,147 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,149 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,161 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-04 10:17:39,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,165 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:17:39,169 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:17:39,169 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:17:39,170 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:17:39,170 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (1/1) ... [2025-03-04 10:17:39,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:17:39,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:39,192 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) [2025-03-04 10:17:39,195 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 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 10:17:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 10:17:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:17:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 10:17:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 10:17:39,212 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 10:17:39,273 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:17:39,274 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:17:39,560 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:17:39,561 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:17:39,723 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:17:39,723 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:17:39,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:17:39 BoogieIcfgContainer [2025-03-04 10:17:39,723 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:17:39,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:17:39,725 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:17:39,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:17:39,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:17:38" (1/3) ... [2025-03-04 10:17:39,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baa5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:17:39, skipping insertion in model container [2025-03-04 10:17:39,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:17:39" (2/3) ... [2025-03-04 10:17:39,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baa5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:17:39, skipping insertion in model container [2025-03-04 10:17:39,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:17:39" (3/3) ... [2025-03-04 10:17:39,732 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2025-03-04 10:17:39,741 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:17:39,742 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-5.wvr.c that has 3 procedures, 41 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2025-03-04 10:17:39,742 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:17:39,795 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-04 10:17:39,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 43 transitions, 100 flow [2025-03-04 10:17:39,869 INFO L124 PetriNetUnfolderBase]: 3/41 cut-off events. [2025-03-04 10:17:39,872 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:17:39,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 3/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-03-04 10:17:39,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 43 transitions, 100 flow [2025-03-04 10:17:39,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 40 transitions, 92 flow [2025-03-04 10:17:39,885 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:17:39,897 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;@32af94de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:17:39,898 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2025-03-04 10:17:39,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:17:39,902 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-04 10:17:39,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:17:39,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:39,904 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:17:39,904 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:39,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash 451936, now seen corresponding path program 1 times [2025-03-04 10:17:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:39,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972355260] [2025-03-04 10:17:39,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:39,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:39,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:17:39,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:17:39,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:39,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:40,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:40,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972355260] [2025-03-04 10:17:40,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972355260] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:40,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:40,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 10:17:40,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102822836] [2025-03-04 10:17:40,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:40,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:17:40,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:40,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:17:40,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:17:40,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-04 10:17:40,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-03-04 10:17:40,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:40,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-04 10:17:40,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:40,282 INFO L124 PetriNetUnfolderBase]: 114/291 cut-off events. [2025-03-04 10:17:40,283 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-03-04 10:17:40,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 291 events. 114/291 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1355 event pairs, 86 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 444. Up to 197 conditions per place. [2025-03-04 10:17:40,286 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 21 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2025-03-04 10:17:40,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 132 flow [2025-03-04 10:17:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:17:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:17:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2025-03-04 10:17:40,296 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2025-03-04 10:17:40,297 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 3 states and 76 transitions. [2025-03-04 10:17:40,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 132 flow [2025-03-04 10:17:40,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:17:40,302 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 82 flow [2025-03-04 10:17:40,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-03-04 10:17:40,305 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2025-03-04 10:17:40,306 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 82 flow [2025-03-04 10:17:40,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-03-04 10:17:40,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:40,306 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:17:40,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 10:17:40,306 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:40,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash 451937, now seen corresponding path program 1 times [2025-03-04 10:17:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:40,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139041442] [2025-03-04 10:17:40,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:40,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:40,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:17:40,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:17:40,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:40,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:40,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139041442] [2025-03-04 10:17:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139041442] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:40,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:17:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389540241] [2025-03-04 10:17:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:40,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:17:40,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:40,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:17:40,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:17:40,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-04 10:17:40,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:40,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:40,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-04 10:17:40,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:40,683 INFO L124 PetriNetUnfolderBase]: 115/294 cut-off events. [2025-03-04 10:17:40,684 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-04 10:17:40,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 294 events. 115/294 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1362 event pairs, 86 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 486. Up to 202 conditions per place. [2025-03-04 10:17:40,685 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 24 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2025-03-04 10:17:40,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 144 flow [2025-03-04 10:17:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:17:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:17:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-03-04 10:17:40,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2025-03-04 10:17:40,688 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 82 flow. Second operand 3 states and 79 transitions. [2025-03-04 10:17:40,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 144 flow [2025-03-04 10:17:40,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:17:40,689 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 97 flow [2025-03-04 10:17:40,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2025-03-04 10:17:40,690 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2025-03-04 10:17:40,690 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 97 flow [2025-03-04 10:17:40,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:40,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:40,690 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-04 10:17:40,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 10:17:40,690 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:40,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash 434326139, now seen corresponding path program 1 times [2025-03-04 10:17:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260553792] [2025-03-04 10:17:40,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:40,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 10:17:40,705 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 10:17:40,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:40,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:40,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260553792] [2025-03-04 10:17:40,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260553792] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:40,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903215795] [2025-03-04 10:17:40,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:40,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:40,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:40,934 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) [2025-03-04 10:17:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 10:17:40,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 10:17:40,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 10:17:40,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:40,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:40,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 10:17:40,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:41,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-04 10:17:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:41,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:41,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903215795] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:41,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:41,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-04 10:17:41,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9026650] [2025-03-04 10:17:41,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:41,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 10:17:41,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:41,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 10:17:41,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-04 10:17:41,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-04 10:17:41,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2025-03-04 10:17:41,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:41,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-04 10:17:41,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:41,644 INFO L124 PetriNetUnfolderBase]: 115/293 cut-off events. [2025-03-04 10:17:41,644 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-04 10:17:41,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 293 events. 115/293 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1357 event pairs, 86 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 486. Up to 198 conditions per place. [2025-03-04 10:17:41,648 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 20 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2025-03-04 10:17:41,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 147 flow [2025-03-04 10:17:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2025-03-04 10:17:41,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5209302325581395 [2025-03-04 10:17:41,650 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 97 flow. Second operand 5 states and 112 transitions. [2025-03-04 10:17:41,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 147 flow [2025-03-04 10:17:41,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:17:41,651 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 110 flow [2025-03-04 10:17:41,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2025-03-04 10:17:41,653 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2025-03-04 10:17:41,653 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 110 flow [2025-03-04 10:17:41,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2025-03-04 10:17:41,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:41,653 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:17:41,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-04 10:17:41,854 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 [2025-03-04 10:17:41,854 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:41,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash 581700652, now seen corresponding path program 1 times [2025-03-04 10:17:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:41,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101543043] [2025-03-04 10:17:41,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:41,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:17:41,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:17:41,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:41,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:41,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:41,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101543043] [2025-03-04 10:17:41,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101543043] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:41,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:41,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:17:41,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388586847] [2025-03-04 10:17:41,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:41,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:17:41,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:41,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:17:41,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:17:41,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2025-03-04 10:17:41,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:41,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:41,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2025-03-04 10:17:41,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:42,015 INFO L124 PetriNetUnfolderBase]: 115/248 cut-off events. [2025-03-04 10:17:42,016 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-04 10:17:42,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 248 events. 115/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 919 event pairs, 86 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 449. Up to 197 conditions per place. [2025-03-04 10:17:42,017 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 23 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2025-03-04 10:17:42,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 150 flow [2025-03-04 10:17:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:17:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:17:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2025-03-04 10:17:42,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2025-03-04 10:17:42,018 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 110 flow. Second operand 4 states and 73 transitions. [2025-03-04 10:17:42,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 150 flow [2025-03-04 10:17:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 137 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-04 10:17:42,019 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 91 flow [2025-03-04 10:17:42,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-03-04 10:17:42,020 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2025-03-04 10:17:42,020 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 91 flow [2025-03-04 10:17:42,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:42,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:42,020 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:17:42,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 10:17:42,020 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:42,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash 581700653, now seen corresponding path program 1 times [2025-03-04 10:17:42,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:42,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541875239] [2025-03-04 10:17:42,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:42,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:42,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:17:42,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:17:42,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:42,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:42,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:42,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541875239] [2025-03-04 10:17:42,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541875239] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:42,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:42,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:17:42,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739700427] [2025-03-04 10:17:42,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:42,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:17:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:42,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:17:42,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:17:42,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:42,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2025-03-04 10:17:42,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:42,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:42,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:42,107 INFO L124 PetriNetUnfolderBase]: 114/247 cut-off events. [2025-03-04 10:17:42,107 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-04 10:17:42,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 247 events. 114/247 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 910 event pairs, 86 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 441. Up to 200 conditions per place. [2025-03-04 10:17:42,110 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 23 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2025-03-04 10:17:42,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 136 flow [2025-03-04 10:17:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:17:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:17:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2025-03-04 10:17:42,110 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2025-03-04 10:17:42,111 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 91 flow. Second operand 3 states and 80 transitions. [2025-03-04 10:17:42,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 136 flow [2025-03-04 10:17:42,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:17:42,111 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 87 flow [2025-03-04 10:17:42,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2025-03-04 10:17:42,112 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2025-03-04 10:17:42,112 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 87 flow [2025-03-04 10:17:42,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2025-03-04 10:17:42,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:42,112 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:42,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-04 10:17:42,112 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:42,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1723508525, now seen corresponding path program 1 times [2025-03-04 10:17:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684729894] [2025-03-04 10:17:42,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:42,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 10:17:42,123 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 10:17:42,124 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:42,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:42,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:42,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684729894] [2025-03-04 10:17:42,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684729894] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:42,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939050012] [2025-03-04 10:17:42,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:42,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:42,265 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) [2025-03-04 10:17:42,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 10:17:42,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 10:17:42,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 10:17:42,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:42,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:42,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 10:17:42,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:42,326 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 [2025-03-04 10:17:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:42,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:42,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939050012] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:42,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 10:17:42,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2025-03-04 10:17:42,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133923822] [2025-03-04 10:17:42,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:42,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:17:42,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:42,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:17:42,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-04 10:17:42,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-04 10:17:42,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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) [2025-03-04 10:17:42,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:42,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-04 10:17:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:42,596 INFO L124 PetriNetUnfolderBase]: 226/440 cut-off events. [2025-03-04 10:17:42,596 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-04 10:17:42,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 440 events. 226/440 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1908 event pairs, 86 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 843. Up to 213 conditions per place. [2025-03-04 10:17:42,598 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2025-03-04 10:17:42,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 210 flow [2025-03-04 10:17:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:17:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:17:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2025-03-04 10:17:42,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2025-03-04 10:17:42,600 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 87 flow. Second operand 4 states and 110 transitions. [2025-03-04 10:17:42,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 210 flow [2025-03-04 10:17:42,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:17:42,601 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 97 flow [2025-03-04 10:17:42,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2025-03-04 10:17:42,601 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2025-03-04 10:17:42,601 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 97 flow [2025-03-04 10:17:42,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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) [2025-03-04 10:17:42,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:42,602 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:42,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 10:17:42,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-04 10:17:42,803 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:42,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1565699094, now seen corresponding path program 1 times [2025-03-04 10:17:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:42,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275291652] [2025-03-04 10:17:42,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:42,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:42,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:17:42,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:17:42,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:42,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:42,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:42,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275291652] [2025-03-04 10:17:42,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275291652] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:42,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655275972] [2025-03-04 10:17:42,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:42,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:42,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:42,975 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) [2025-03-04 10:17:42,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 10:17:43,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:17:43,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:17:43,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:43,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:43,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:17:43,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:43,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:43,207 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 [2025-03-04 10:17:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:43,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655275972] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:43,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:43,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-03-04 10:17:43,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126083755] [2025-03-04 10:17:43,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:43,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 10:17:43,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:43,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 10:17:43,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-03-04 10:17:43,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-04 10:17:43,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 97 flow. Second operand has 17 states, 17 states have (on average 18.764705882352942) internal successors, (319), 17 states have internal predecessors, (319), 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) [2025-03-04 10:17:43,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:43,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-04 10:17:43,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:44,057 INFO L124 PetriNetUnfolderBase]: 464/979 cut-off events. [2025-03-04 10:17:44,057 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2025-03-04 10:17:44,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 979 events. 464/979 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5438 event pairs, 243 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 982. Up to 393 conditions per place. [2025-03-04 10:17:44,061 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 69 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2025-03-04 10:17:44,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 86 transitions, 393 flow [2025-03-04 10:17:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 10:17:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 10:17:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2025-03-04 10:17:44,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-04 10:17:44,063 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 97 flow. Second operand 8 states and 215 transitions. [2025-03-04 10:17:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 86 transitions, 393 flow [2025-03-04 10:17:44,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 86 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:17:44,064 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 180 flow [2025-03-04 10:17:44,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=180, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2025-03-04 10:17:44,065 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2025-03-04 10:17:44,065 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 180 flow [2025-03-04 10:17:44,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.764705882352942) internal successors, (319), 17 states have internal predecessors, (319), 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) [2025-03-04 10:17:44,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:44,065 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:44,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-04 10:17:44,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:44,270 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:44,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1530368121, now seen corresponding path program 1 times [2025-03-04 10:17:44,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:44,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714782434] [2025-03-04 10:17:44,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:44,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:44,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:17:44,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:17:44,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:44,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:44,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714782434] [2025-03-04 10:17:44,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714782434] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:44,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071678449] [2025-03-04 10:17:44,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:44,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:44,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:44,375 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) [2025-03-04 10:17:44,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 10:17:44,408 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:17:44,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:17:44,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:44,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:44,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 10:17:44,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:44,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:44,525 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 29 treesize of output 25 [2025-03-04 10:17:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:44,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071678449] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:44,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:44,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-04 10:17:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553867432] [2025-03-04 10:17:44,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:44,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 10:17:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:44,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 10:17:44,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-04 10:17:44,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-04 10:17:44,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 180 flow. Second operand has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 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) [2025-03-04 10:17:44,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:44,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-04 10:17:44,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:44,818 INFO L124 PetriNetUnfolderBase]: 767/1349 cut-off events. [2025-03-04 10:17:44,818 INFO L125 PetriNetUnfolderBase]: For 810/858 co-relation queries the response was YES. [2025-03-04 10:17:44,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3335 conditions, 1349 events. 767/1349 cut-off events. For 810/858 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6329 event pairs, 162 based on Foata normal form. 32/1189 useless extension candidates. Maximal degree in co-relation 2075. Up to 977 conditions per place. [2025-03-04 10:17:44,824 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 47 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2025-03-04 10:17:44,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 338 flow [2025-03-04 10:17:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2025-03-04 10:17:44,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2025-03-04 10:17:44,826 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 180 flow. Second operand 5 states and 107 transitions. [2025-03-04 10:17:44,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 338 flow [2025-03-04 10:17:44,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:17:44,830 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 202 flow [2025-03-04 10:17:44,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2025-03-04 10:17:44,830 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2025-03-04 10:17:44,830 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 202 flow [2025-03-04 10:17:44,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 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) [2025-03-04 10:17:44,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:44,831 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:44,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 10:17:45,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:45,031 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:45,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash 196771987, now seen corresponding path program 1 times [2025-03-04 10:17:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:45,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560105473] [2025-03-04 10:17:45,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:45,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:17:45,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:17:45,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:45,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560105473] [2025-03-04 10:17:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560105473] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012057513] [2025-03-04 10:17:45,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:45,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:45,156 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) [2025-03-04 10:17:45,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 10:17:45,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:17:45,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:17:45,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:45,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:45,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:17:45,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:45,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:45,300 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 29 treesize of output 25 [2025-03-04 10:17:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:45,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012057513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:45,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:45,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-03-04 10:17:45,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268589619] [2025-03-04 10:17:45,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:45,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 10:17:45,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:45,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 10:17:45,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-04 10:17:45,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-04 10:17:45,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 202 flow. Second operand has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 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) [2025-03-04 10:17:45,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:45,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-04 10:17:45,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:45,816 INFO L124 PetriNetUnfolderBase]: 859/1498 cut-off events. [2025-03-04 10:17:45,816 INFO L125 PetriNetUnfolderBase]: For 999/1057 co-relation queries the response was YES. [2025-03-04 10:17:45,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 1498 events. 859/1498 cut-off events. For 999/1057 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6982 event pairs, 395 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 2242. Up to 1153 conditions per place. [2025-03-04 10:17:45,822 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 64 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2025-03-04 10:17:45,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 75 transitions, 446 flow [2025-03-04 10:17:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 10:17:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 10:17:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2025-03-04 10:17:45,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2025-03-04 10:17:45,824 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 202 flow. Second operand 7 states and 161 transitions. [2025-03-04 10:17:45,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 75 transitions, 446 flow [2025-03-04 10:17:45,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 435 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-03-04 10:17:45,826 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 225 flow [2025-03-04 10:17:45,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2025-03-04 10:17:45,827 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2025-03-04 10:17:45,827 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 225 flow [2025-03-04 10:17:45,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 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) [2025-03-04 10:17:45,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:45,827 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:45,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 10:17:46,028 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 [2025-03-04 10:17:46,028 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:46,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 394868156, now seen corresponding path program 2 times [2025-03-04 10:17:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:46,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017809736] [2025-03-04 10:17:46,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:17:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:46,034 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-04 10:17:46,038 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-03-04 10:17:46,039 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:17:46,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:17:46,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:46,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017809736] [2025-03-04 10:17:46,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017809736] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:46,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713251453] [2025-03-04 10:17:46,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:17:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:46,132 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) [2025-03-04 10:17:46,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 10:17:46,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-04 10:17:46,178 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 12 statements. [2025-03-04 10:17:46,178 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:17:46,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:46,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-04 10:17:46,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:46,190 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 [2025-03-04 10:17:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:17:46,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:17:46,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713251453] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:46,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:46,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-04 10:17:46,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699102298] [2025-03-04 10:17:46,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:46,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 10:17:46,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:46,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 10:17:46,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-04 10:17:46,611 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-04 10:17:46,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 225 flow. Second operand has 11 states, 11 states have (on average 19.727272727272727) internal successors, (217), 11 states have internal predecessors, (217), 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) [2025-03-04 10:17:46,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:46,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-04 10:17:46,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:46,788 INFO L124 PetriNetUnfolderBase]: 629/1225 cut-off events. [2025-03-04 10:17:46,789 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2025-03-04 10:17:46,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3124 conditions, 1225 events. 629/1225 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6431 event pairs, 362 based on Foata normal form. 0/1161 useless extension candidates. Maximal degree in co-relation 1884. Up to 814 conditions per place. [2025-03-04 10:17:46,795 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 40 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2025-03-04 10:17:46,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 368 flow [2025-03-04 10:17:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2025-03-04 10:17:46,796 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2025-03-04 10:17:46,796 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 225 flow. Second operand 5 states and 120 transitions. [2025-03-04 10:17:46,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 368 flow [2025-03-04 10:17:46,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 351 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-04 10:17:46,799 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 224 flow [2025-03-04 10:17:46,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2025-03-04 10:17:46,799 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2025-03-04 10:17:46,799 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 224 flow [2025-03-04 10:17:46,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.727272727272727) internal successors, (217), 11 states have internal predecessors, (217), 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) [2025-03-04 10:17:46,799 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:46,799 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:46,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-04 10:17:47,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:47,002 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:47,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1739248723, now seen corresponding path program 2 times [2025-03-04 10:17:47,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:47,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775019300] [2025-03-04 10:17:47,003 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:17:47,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:47,010 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-04 10:17:47,021 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-03-04 10:17:47,021 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:17:47,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 10:17:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775019300] [2025-03-04 10:17:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775019300] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:47,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:47,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:17:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082266683] [2025-03-04 10:17:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:47,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:17:47,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:47,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:17:47,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:17:47,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-04 10:17:47,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2025-03-04 10:17:47,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:47,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-04 10:17:47,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:47,353 INFO L124 PetriNetUnfolderBase]: 675/1183 cut-off events. [2025-03-04 10:17:47,353 INFO L125 PetriNetUnfolderBase]: For 1459/1459 co-relation queries the response was YES. [2025-03-04 10:17:47,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 1183 events. 675/1183 cut-off events. For 1459/1459 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5238 event pairs, 322 based on Foata normal form. 96/1183 useless extension candidates. Maximal degree in co-relation 1927. Up to 684 conditions per place. [2025-03-04 10:17:47,358 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2025-03-04 10:17:47,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 361 flow [2025-03-04 10:17:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2025-03-04 10:17:47,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2025-03-04 10:17:47,361 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 224 flow. Second operand 5 states and 99 transitions. [2025-03-04 10:17:47,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 361 flow [2025-03-04 10:17:47,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:17:47,365 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 204 flow [2025-03-04 10:17:47,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2025-03-04 10:17:47,366 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2025-03-04 10:17:47,366 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 204 flow [2025-03-04 10:17:47,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2025-03-04 10:17:47,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:47,366 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:47,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-04 10:17:47,367 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:47,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash -916332715, now seen corresponding path program 1 times [2025-03-04 10:17:47,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:47,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844251911] [2025-03-04 10:17:47,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:47,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:47,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:17:47,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:17:47,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:47,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:47,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844251911] [2025-03-04 10:17:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844251911] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:47,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:17:47,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063129776] [2025-03-04 10:17:47,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:47,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:17:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:47,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:17:47,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:17:47,409 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:47,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2025-03-04 10:17:47,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:47,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:47,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:47,492 INFO L124 PetriNetUnfolderBase]: 629/1133 cut-off events. [2025-03-04 10:17:47,492 INFO L125 PetriNetUnfolderBase]: For 933/933 co-relation queries the response was YES. [2025-03-04 10:17:47,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3035 conditions, 1133 events. 629/1133 cut-off events. For 933/933 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5135 event pairs, 174 based on Foata normal form. 2/1071 useless extension candidates. Maximal degree in co-relation 1810. Up to 913 conditions per place. [2025-03-04 10:17:47,496 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 43 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2025-03-04 10:17:47,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 343 flow [2025-03-04 10:17:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:17:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:17:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2025-03-04 10:17:47,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7054263565891473 [2025-03-04 10:17:47,497 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 204 flow. Second operand 3 states and 91 transitions. [2025-03-04 10:17:47,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 343 flow [2025-03-04 10:17:47,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 325 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:17:47,499 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 221 flow [2025-03-04 10:17:47,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2025-03-04 10:17:47,500 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2025-03-04 10:17:47,500 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 221 flow [2025-03-04 10:17:47,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2025-03-04 10:17:47,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:47,500 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:47,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-04 10:17:47,500 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:47,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1143518206, now seen corresponding path program 1 times [2025-03-04 10:17:47,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:47,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575972928] [2025-03-04 10:17:47,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:47,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:17:47,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:17:47,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:47,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:47,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:47,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575972928] [2025-03-04 10:17:47,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575972928] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:47,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753404158] [2025-03-04 10:17:47,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:47,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:47,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:47,636 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) [2025-03-04 10:17:47,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 10:17:47,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:17:47,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:17:47,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:47,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:47,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 10:17:47,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:47,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:47,888 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 [2025-03-04 10:17:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:48,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753404158] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:48,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:48,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2025-03-04 10:17:48,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252469051] [2025-03-04 10:17:48,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:48,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-04 10:17:48,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:48,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-04 10:17:48,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-03-04 10:17:48,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-04 10:17:48,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 221 flow. Second operand has 17 states, 17 states have (on average 15.823529411764707) internal successors, (269), 17 states have internal predecessors, (269), 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) [2025-03-04 10:17:48,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:48,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-04 10:17:48,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:48,458 INFO L124 PetriNetUnfolderBase]: 652/1140 cut-off events. [2025-03-04 10:17:48,458 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2025-03-04 10:17:48,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1140 events. 652/1140 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4954 event pairs, 320 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 1887. Up to 508 conditions per place. [2025-03-04 10:17:48,462 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 69 selfloop transitions, 11 changer transitions 1/82 dead transitions. [2025-03-04 10:17:48,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 512 flow [2025-03-04 10:17:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 10:17:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 10:17:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2025-03-04 10:17:48,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2025-03-04 10:17:48,463 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 221 flow. Second operand 8 states and 176 transitions. [2025-03-04 10:17:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 512 flow [2025-03-04 10:17:48,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 82 transitions, 503 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-04 10:17:48,466 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 256 flow [2025-03-04 10:17:48,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2025-03-04 10:17:48,466 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2025-03-04 10:17:48,466 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 256 flow [2025-03-04 10:17:48,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.823529411764707) internal successors, (269), 17 states have internal predecessors, (269), 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) [2025-03-04 10:17:48,466 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:48,467 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:48,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-04 10:17:48,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:48,667 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:48,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash -124944088, now seen corresponding path program 2 times [2025-03-04 10:17:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:48,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163646521] [2025-03-04 10:17:48,668 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:17:48,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:48,672 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:48,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 18 statements. [2025-03-04 10:17:48,677 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:17:48,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:17:48,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163646521] [2025-03-04 10:17:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163646521] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900557419] [2025-03-04 10:17:48,769 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:17:48,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:48,772 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) [2025-03-04 10:17:48,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 10:17:48,810 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:48,836 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 18 statements. [2025-03-04 10:17:48,837 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:17:48,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:48,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-04 10:17:48,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:48,850 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 [2025-03-04 10:17:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:17:48,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:17:49,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900557419] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:49,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:49,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2025-03-04 10:17:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578688813] [2025-03-04 10:17:49,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:49,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:17:49,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:49,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:17:49,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:17:49,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2025-03-04 10:17:49,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 256 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 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) [2025-03-04 10:17:49,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:49,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2025-03-04 10:17:49,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:49,402 INFO L124 PetriNetUnfolderBase]: 629/1101 cut-off events. [2025-03-04 10:17:49,402 INFO L125 PetriNetUnfolderBase]: For 1313/1313 co-relation queries the response was YES. [2025-03-04 10:17:49,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 1101 events. 629/1101 cut-off events. For 1313/1313 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4749 event pairs, 196 based on Foata normal form. 16/1117 useless extension candidates. Maximal degree in co-relation 1854. Up to 640 conditions per place. [2025-03-04 10:17:49,407 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2025-03-04 10:17:49,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 426 flow [2025-03-04 10:17:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2025-03-04 10:17:49,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2025-03-04 10:17:49,408 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 256 flow. Second operand 5 states and 95 transitions. [2025-03-04 10:17:49,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 426 flow [2025-03-04 10:17:49,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 409 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-04 10:17:49,410 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 250 flow [2025-03-04 10:17:49,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2025-03-04 10:17:49,411 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2025-03-04 10:17:49,411 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 250 flow [2025-03-04 10:17:49,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 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) [2025-03-04 10:17:49,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:49,411 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:49,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 10:17:49,612 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,SelfDestructingSolverStorable13 [2025-03-04 10:17:49,612 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:49,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash -628786694, now seen corresponding path program 1 times [2025-03-04 10:17:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119192660] [2025-03-04 10:17:49,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:49,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 10:17:49,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:49,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:49,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:49,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:49,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119192660] [2025-03-04 10:17:49,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119192660] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:49,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:49,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 10:17:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768049309] [2025-03-04 10:17:49,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:49,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:17:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:49,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:17:49,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-04 10:17:49,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 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) [2025-03-04 10:17:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:49,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:49,859 INFO L124 PetriNetUnfolderBase]: 641/1149 cut-off events. [2025-03-04 10:17:49,859 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2025-03-04 10:17:49,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3442 conditions, 1149 events. 641/1149 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5330 event pairs, 94 based on Foata normal form. 58/1207 useless extension candidates. Maximal degree in co-relation 2114. Up to 594 conditions per place. [2025-03-04 10:17:49,864 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 75 selfloop transitions, 16 changer transitions 1/93 dead transitions. [2025-03-04 10:17:49,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 674 flow [2025-03-04 10:17:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 10:17:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 10:17:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2025-03-04 10:17:49,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2025-03-04 10:17:49,865 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 250 flow. Second operand 7 states and 196 transitions. [2025-03-04 10:17:49,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 674 flow [2025-03-04 10:17:49,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 640 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:17:49,868 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 388 flow [2025-03-04 10:17:49,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2025-03-04 10:17:49,868 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2025-03-04 10:17:49,869 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 388 flow [2025-03-04 10:17:49,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 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) [2025-03-04 10:17:49,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:49,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:49,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-04 10:17:49,869 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:49,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 777811140, now seen corresponding path program 2 times [2025-03-04 10:17:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:49,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800761989] [2025-03-04 10:17:49,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:17:49,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:49,874 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:49,885 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:49,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:17:49,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800761989] [2025-03-04 10:17:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800761989] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036996770] [2025-03-04 10:17:50,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:17:50,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:50,009 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) [2025-03-04 10:17:50,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 10:17:50,044 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:50,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:50,057 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:17:50,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:50,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:17:50,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:50,145 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:17:50,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036996770] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:50,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 10:17:50,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2025-03-04 10:17:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203622769] [2025-03-04 10:17:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:50,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:17:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:50,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:17:50,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-04 10:17:50,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:50,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:50,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:50,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:50,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:50,276 INFO L124 PetriNetUnfolderBase]: 633/1153 cut-off events. [2025-03-04 10:17:50,276 INFO L125 PetriNetUnfolderBase]: For 2851/2851 co-relation queries the response was YES. [2025-03-04 10:17:50,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 1153 events. 633/1153 cut-off events. For 2851/2851 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5373 event pairs, 271 based on Foata normal form. 12/1165 useless extension candidates. Maximal degree in co-relation 2663. Up to 838 conditions per place. [2025-03-04 10:17:50,282 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 64 selfloop transitions, 10 changer transitions 5/80 dead transitions. [2025-03-04 10:17:50,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 723 flow [2025-03-04 10:17:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2025-03-04 10:17:50,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2025-03-04 10:17:50,283 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 388 flow. Second operand 5 states and 135 transitions. [2025-03-04 10:17:50,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 723 flow [2025-03-04 10:17:50,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 701 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-03-04 10:17:50,288 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 421 flow [2025-03-04 10:17:50,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2025-03-04 10:17:50,289 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2025-03-04 10:17:50,289 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 421 flow [2025-03-04 10:17:50,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:50,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:50,289 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:50,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-04 10:17:50,495 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,SelfDestructingSolverStorable15 [2025-03-04 10:17:50,496 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:50,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash 849194470, now seen corresponding path program 3 times [2025-03-04 10:17:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:50,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567309245] [2025-03-04 10:17:50,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:17:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:50,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:50,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:50,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 10:17:50,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:50,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:50,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567309245] [2025-03-04 10:17:50,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567309245] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:50,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52680544] [2025-03-04 10:17:50,665 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:17:50,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:50,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:50,667 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) [2025-03-04 10:17:50,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 10:17:50,709 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:50,724 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:50,725 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 10:17:50,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:50,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:17:50,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:50,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:50,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52680544] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:50,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:50,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 12 [2025-03-04 10:17:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822467805] [2025-03-04 10:17:50,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:50,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 10:17:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:50,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 10:17:50,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-03-04 10:17:50,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:50,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 421 flow. Second operand has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 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) [2025-03-04 10:17:50,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:50,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:50,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:51,329 INFO L124 PetriNetUnfolderBase]: 849/1531 cut-off events. [2025-03-04 10:17:51,330 INFO L125 PetriNetUnfolderBase]: For 4763/4763 co-relation queries the response was YES. [2025-03-04 10:17:51,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6061 conditions, 1531 events. 849/1531 cut-off events. For 4763/4763 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7736 event pairs, 192 based on Foata normal form. 18/1549 useless extension candidates. Maximal degree in co-relation 3750. Up to 582 conditions per place. [2025-03-04 10:17:51,341 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 62 changer transitions 3/144 dead transitions. [2025-03-04 10:17:51,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 144 transitions, 1329 flow [2025-03-04 10:17:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:17:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:17:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2025-03-04 10:17:51,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6152219873150105 [2025-03-04 10:17:51,344 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 421 flow. Second operand 11 states and 291 transitions. [2025-03-04 10:17:51,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 144 transitions, 1329 flow [2025-03-04 10:17:51,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 144 transitions, 1283 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-04 10:17:51,354 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 1001 flow [2025-03-04 10:17:51,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1001, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2025-03-04 10:17:51,355 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2025-03-04 10:17:51,355 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 1001 flow [2025-03-04 10:17:51,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 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) [2025-03-04 10:17:51,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:51,356 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:51,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-04 10:17:51,556 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,SelfDestructingSolverStorable16 [2025-03-04 10:17:51,557 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:51,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash -121705024, now seen corresponding path program 4 times [2025-03-04 10:17:51,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:51,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898312958] [2025-03-04 10:17:51,557 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 10:17:51,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:51,561 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:51,568 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:51,568 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 10:17:51,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898312958] [2025-03-04 10:17:51,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898312958] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:51,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:51,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 10:17:51,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127007417] [2025-03-04 10:17:51,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:51,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:17:51,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:51,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:17:51,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:17:51,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:51,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 1001 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:51,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:51,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:51,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:51,819 INFO L124 PetriNetUnfolderBase]: 849/1531 cut-off events. [2025-03-04 10:17:51,819 INFO L125 PetriNetUnfolderBase]: For 7942/7942 co-relation queries the response was YES. [2025-03-04 10:17:51,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7474 conditions, 1531 events. 849/1531 cut-off events. For 7942/7942 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7741 event pairs, 298 based on Foata normal form. 4/1535 useless extension candidates. Maximal degree in co-relation 6177. Up to 988 conditions per place. [2025-03-04 10:17:51,827 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 87 selfloop transitions, 29 changer transitions 2/119 dead transitions. [2025-03-04 10:17:51,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 119 transitions, 1461 flow [2025-03-04 10:17:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2025-03-04 10:17:51,829 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6465116279069767 [2025-03-04 10:17:51,829 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 1001 flow. Second operand 5 states and 139 transitions. [2025-03-04 10:17:51,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 119 transitions, 1461 flow [2025-03-04 10:17:51,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 119 transitions, 1423 flow, removed 18 selfloop flow, removed 1 redundant places. [2025-03-04 10:17:51,844 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 1141 flow [2025-03-04 10:17:51,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1141, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2025-03-04 10:17:51,845 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2025-03-04 10:17:51,845 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 1141 flow [2025-03-04 10:17:51,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:17:51,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:51,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:51,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-04 10:17:51,846 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:51,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1839454084, now seen corresponding path program 5 times [2025-03-04 10:17:51,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:51,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117248078] [2025-03-04 10:17:51,846 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 10:17:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:51,851 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:51,854 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:51,855 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:17:51,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117248078] [2025-03-04 10:17:51,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117248078] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:51,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564954824] [2025-03-04 10:17:51,915 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 10:17:51,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:51,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:51,917 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) [2025-03-04 10:17:51,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 10:17:51,951 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-04 10:17:51,961 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:17:51,961 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:17:51,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:51,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 10:17:51,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:51,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:52,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564954824] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:52,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:52,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2025-03-04 10:17:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731155563] [2025-03-04 10:17:52,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:52,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:17:52,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:52,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:17:52,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:17:52,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:52,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 1141 flow. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 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) [2025-03-04 10:17:52,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:52,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:52,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:52,271 INFO L124 PetriNetUnfolderBase]: 891/1597 cut-off events. [2025-03-04 10:17:52,272 INFO L125 PetriNetUnfolderBase]: For 9820/9820 co-relation queries the response was YES. [2025-03-04 10:17:52,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8081 conditions, 1597 events. 891/1597 cut-off events. For 9820/9820 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8093 event pairs, 270 based on Foata normal form. 28/1625 useless extension candidates. Maximal degree in co-relation 6920. Up to 930 conditions per place. [2025-03-04 10:17:52,280 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 91 selfloop transitions, 50 changer transitions 4/146 dead transitions. [2025-03-04 10:17:52,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 146 transitions, 1797 flow [2025-03-04 10:17:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 10:17:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 10:17:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2025-03-04 10:17:52,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6020671834625323 [2025-03-04 10:17:52,281 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 1141 flow. Second operand 9 states and 233 transitions. [2025-03-04 10:17:52,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 146 transitions, 1797 flow [2025-03-04 10:17:52,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 146 transitions, 1757 flow, removed 9 selfloop flow, removed 1 redundant places. [2025-03-04 10:17:52,300 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 1377 flow [2025-03-04 10:17:52,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2025-03-04 10:17:52,300 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2025-03-04 10:17:52,300 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 1377 flow [2025-03-04 10:17:52,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 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) [2025-03-04 10:17:52,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:52,301 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:52,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-04 10:17:52,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:52,501 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:52,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash 566847846, now seen corresponding path program 1 times [2025-03-04 10:17:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:52,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043766976] [2025-03-04 10:17:52,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:52,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-04 10:17:52,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-04 10:17:52,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:52,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:52,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:52,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043766976] [2025-03-04 10:17:52,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043766976] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:17:52,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:17:52,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 10:17:52,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403155864] [2025-03-04 10:17:52,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:17:52,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:17:52,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:52,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:17:52,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:17:52,564 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:52,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 1377 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2025-03-04 10:17:52,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:52,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:52,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:17:52,736 INFO L124 PetriNetUnfolderBase]: 807/1413 cut-off events. [2025-03-04 10:17:52,737 INFO L125 PetriNetUnfolderBase]: For 11566/11566 co-relation queries the response was YES. [2025-03-04 10:17:52,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7890 conditions, 1413 events. 807/1413 cut-off events. For 11566/11566 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 298 based on Foata normal form. 18/1431 useless extension candidates. Maximal degree in co-relation 6986. Up to 1044 conditions per place. [2025-03-04 10:17:52,745 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 97 selfloop transitions, 21 changer transitions 8/127 dead transitions. [2025-03-04 10:17:52,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 127 transitions, 1730 flow [2025-03-04 10:17:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:17:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:17:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2025-03-04 10:17:52,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2025-03-04 10:17:52,746 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 1377 flow. Second operand 5 states and 136 transitions. [2025-03-04 10:17:52,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 127 transitions, 1730 flow [2025-03-04 10:17:52,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 127 transitions, 1603 flow, removed 21 selfloop flow, removed 6 redundant places. [2025-03-04 10:17:52,767 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 1327 flow [2025-03-04 10:17:52,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1327, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2025-03-04 10:17:52,768 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2025-03-04 10:17:52,768 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 1327 flow [2025-03-04 10:17:52,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2025-03-04 10:17:52,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:17:52,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:17:52,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-04 10:17:52,768 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:17:52,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:17:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1546708519, now seen corresponding path program 1 times [2025-03-04 10:17:52,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:17:52,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7236556] [2025-03-04 10:17:52,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:52,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:17:52,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 10:17:52,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 10:17:52,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:52,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:17:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:17:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7236556] [2025-03-04 10:17:52,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7236556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:17:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789053299] [2025-03-04 10:17:52,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:17:52,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:17:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:17:52,929 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) [2025-03-04 10:17:52,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 10:17:52,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 10:17:52,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 10:17:52,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:17:52,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:17:52,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-04 10:17:52,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:17:53,017 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 [2025-03-04 10:17:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:53,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:17:53,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2025-03-04 10:17:53,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:17:53,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 532 treesize of output 436 [2025-03-04 10:17:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:17:57,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789053299] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:17:57,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:17:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 21 [2025-03-04 10:17:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839879765] [2025-03-04 10:17:57,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:17:57,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-04 10:17:57,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:17:57,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-04 10:17:57,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2025-03-04 10:17:58,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:17:58,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 1327 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) [2025-03-04 10:17:58,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:17:58,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:17:58,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:18:00,243 INFO L124 PetriNetUnfolderBase]: 1648/2838 cut-off events. [2025-03-04 10:18:00,243 INFO L125 PetriNetUnfolderBase]: For 19159/19159 co-relation queries the response was YES. [2025-03-04 10:18:00,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14955 conditions, 2838 events. 1648/2838 cut-off events. For 19159/19159 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 14406 event pairs, 42 based on Foata normal form. 86/2924 useless extension candidates. Maximal degree in co-relation 13837. Up to 775 conditions per place. [2025-03-04 10:18:00,257 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 149 selfloop transitions, 94 changer transitions 159/403 dead transitions. [2025-03-04 10:18:00,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 403 transitions, 4549 flow [2025-03-04 10:18:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-04 10:18:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-04 10:18:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 793 transitions. [2025-03-04 10:18:00,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6147286821705427 [2025-03-04 10:18:00,260 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 1327 flow. Second operand 30 states and 793 transitions. [2025-03-04 10:18:00,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 403 transitions, 4549 flow [2025-03-04 10:18:00,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 403 transitions, 4475 flow, removed 11 selfloop flow, removed 4 redundant places. [2025-03-04 10:18:00,293 INFO L231 Difference]: Finished difference. Result has 138 places, 147 transitions, 1833 flow [2025-03-04 10:18:00,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1833, PETRI_PLACES=138, PETRI_TRANSITIONS=147} [2025-03-04 10:18:00,293 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2025-03-04 10:18:00,294 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 147 transitions, 1833 flow [2025-03-04 10:18:00,294 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) [2025-03-04 10:18:00,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:18:00,294 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:18:00,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 10:18:00,498 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,SelfDestructingSolverStorable20 [2025-03-04 10:18:00,498 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:18:00,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:18:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1470414798, now seen corresponding path program 2 times [2025-03-04 10:18:00,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:18:00,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864969326] [2025-03-04 10:18:00,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:18:00,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:18:00,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 10:18:00,525 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 10:18:00,526 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:18:00,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:18:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 10:18:01,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:18:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864969326] [2025-03-04 10:18:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864969326] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:18:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937692181] [2025-03-04 10:18:01,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:18:01,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:18:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:18:01,614 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) [2025-03-04 10:18:01,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 10:18:01,650 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 10:18:01,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 10:18:01,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:18:01,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:18:01,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-04 10:18:01,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:18:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 10:18:02,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:18:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 10:18:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937692181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:18:03,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:18:03,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2025-03-04 10:18:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808149691] [2025-03-04 10:18:03,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:18:03,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 10:18:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:18:03,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 10:18:03,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-03-04 10:18:03,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:18:03,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 1833 flow. Second operand has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 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) [2025-03-04 10:18:03,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:18:03,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:18:03,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:18:05,972 INFO L124 PetriNetUnfolderBase]: 1388/2454 cut-off events. [2025-03-04 10:18:05,972 INFO L125 PetriNetUnfolderBase]: For 33941/33941 co-relation queries the response was YES. [2025-03-04 10:18:05,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16153 conditions, 2454 events. 1388/2454 cut-off events. For 33941/33941 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12200 event pairs, 227 based on Foata normal form. 69/2523 useless extension candidates. Maximal degree in co-relation 16104. Up to 636 conditions per place. [2025-03-04 10:18:05,993 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 300 selfloop transitions, 80 changer transitions 15/396 dead transitions. [2025-03-04 10:18:05,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 396 transitions, 5240 flow [2025-03-04 10:18:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-04 10:18:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-04 10:18:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 574 transitions. [2025-03-04 10:18:05,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6067653276955602 [2025-03-04 10:18:05,994 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 1833 flow. Second operand 22 states and 574 transitions. [2025-03-04 10:18:05,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 396 transitions, 5240 flow [2025-03-04 10:18:06,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 396 transitions, 4651 flow, removed 271 selfloop flow, removed 20 redundant places. [2025-03-04 10:18:06,047 INFO L231 Difference]: Finished difference. Result has 132 places, 199 transitions, 2452 flow [2025-03-04 10:18:06,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2452, PETRI_PLACES=132, PETRI_TRANSITIONS=199} [2025-03-04 10:18:06,047 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2025-03-04 10:18:06,047 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 199 transitions, 2452 flow [2025-03-04 10:18:06,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 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) [2025-03-04 10:18:06,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:18:06,048 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:18:06,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-04 10:18:06,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-04 10:18:06,248 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:18:06,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:18:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -723671322, now seen corresponding path program 3 times [2025-03-04 10:18:06,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:18:06,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140401811] [2025-03-04 10:18:06,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:18:06,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:18:06,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-04 10:18:06,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 10:18:06,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-04 10:18:06,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:18:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 10:18:06,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:18:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140401811] [2025-03-04 10:18:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140401811] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:18:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926176494] [2025-03-04 10:18:06,505 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:18:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:18:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:18:06,507 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) [2025-03-04 10:18:06,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 10:18:06,548 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 3 equivalence classes. [2025-03-04 10:18:06,643 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 10:18:06,644 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-04 10:18:06,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:18:06,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 10:18:06,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:18:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:18:06,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:18:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 10:18:07,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926176494] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:18:07,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:18:07,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2025-03-04 10:18:07,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029234041] [2025-03-04 10:18:07,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:18:07,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:18:07,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:18:07,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:18:07,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2025-03-04 10:18:07,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-04 10:18:07,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 199 transitions, 2452 flow. Second operand has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 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) [2025-03-04 10:18:07,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:18:07,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-04 10:18:07,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:18:08,482 INFO L124 PetriNetUnfolderBase]: 1161/1990 cut-off events. [2025-03-04 10:18:08,482 INFO L125 PetriNetUnfolderBase]: For 29982/29982 co-relation queries the response was YES. [2025-03-04 10:18:08,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13480 conditions, 1990 events. 1161/1990 cut-off events. For 29982/29982 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8761 event pairs, 119 based on Foata normal form. 148/2138 useless extension candidates. Maximal degree in co-relation 13435. Up to 622 conditions per place. [2025-03-04 10:18:08,493 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 259 selfloop transitions, 81 changer transitions 0/341 dead transitions. [2025-03-04 10:18:08,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 341 transitions, 4668 flow [2025-03-04 10:18:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-04 10:18:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-04 10:18:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 384 transitions. [2025-03-04 10:18:08,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2025-03-04 10:18:08,495 INFO L175 Difference]: Start difference. First operand has 132 places, 199 transitions, 2452 flow. Second operand 14 states and 384 transitions. [2025-03-04 10:18:08,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 341 transitions, 4668 flow [2025-03-04 10:18:08,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 341 transitions, 4231 flow, removed 191 selfloop flow, removed 12 redundant places. [2025-03-04 10:18:08,535 INFO L231 Difference]: Finished difference. Result has 129 places, 183 transitions, 2196 flow [2025-03-04 10:18:08,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2196, PETRI_PLACES=129, PETRI_TRANSITIONS=183} [2025-03-04 10:18:08,536 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2025-03-04 10:18:08,536 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 183 transitions, 2196 flow [2025-03-04 10:18:08,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 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) [2025-03-04 10:18:08,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:18:08,537 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:18:08,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 10:18:08,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:18:08,738 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-04 10:18:08,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:18:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 302116697, now seen corresponding path program 4 times [2025-03-04 10:18:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:18:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289085773] [2025-03-04 10:18:08,738 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 10:18:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:18:08,743 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-04 10:18:08,783 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-04 10:18:08,784 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 10:18:08,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:18:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:18:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:18:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289085773] [2025-03-04 10:18:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289085773] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:18:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006611109] [2025-03-04 10:18:10,123 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 10:18:10,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:18:10,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:18:10,125 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) [2025-03-04 10:18:10,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 10:18:10,160 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-04 10:18:10,215 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-04 10:18:10,215 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 10:18:10,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:18:10,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-04 10:18:10,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:18:10,278 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 [2025-03-04 10:18:10,816 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2025-03-04 10:18:10,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2025-03-04 10:18:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:18:10,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:18:12,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 818 treesize of output 718 [2025-03-04 10:18:16,279 INFO L349 Elim1Store]: treesize reduction 5, result has 99.4 percent of original size [2025-03-04 10:18:16,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 25 new quantified variables, introduced 91 case distinctions, treesize of input 17611 treesize of output 8090