./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-4.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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:51:11,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:51:11,163 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:51:11,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:51:11,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:51:11,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:51:11,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:51:11,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:51:11,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:51:11,187 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:51:11,187 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:51:11,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:51:11,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:51:11,189 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:51:11,189 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:51:11,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:51:11,190 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:51:11,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:51:11,191 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:51:11,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:51:11,191 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:51:11,195 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:51:11,195 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:51:11,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:51:11,195 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:51:11,195 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:51:11,196 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:51:11,196 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:51:11,196 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:51:11,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:51:11,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:51:11,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:51:11,198 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:51:11,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:51:11,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:51:11,199 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:51:11,199 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:51:11,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:51:11,199 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:51:11,200 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:51:11,200 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:51:11,200 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:51:11,200 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2024-11-20 17:51:11,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:51:11,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:51:11,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:51:11,478 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:51:11,479 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:51:11,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-20 17:51:12,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:51:13,136 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:51:13,137 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-20 17:51:13,144 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3012e9d2c/5111d7b31e4a4256b959b0a19d958d68/FLAGb624816ab [2024-11-20 17:51:13,163 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3012e9d2c/5111d7b31e4a4256b959b0a19d958d68 [2024-11-20 17:51:13,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:51:13,168 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:51:13,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:51:13,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:51:13,177 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:51:13,178 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff8ef9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13, skipping insertion in model container [2024-11-20 17:51:13,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,202 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:51:13,426 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:51:13,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:51:13,438 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:51:13,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:51:13,491 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:51:13,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13 WrapperNode [2024-11-20 17:51:13,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:51:13,493 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:51:13,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:51:13,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:51:13,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,533 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 178 [2024-11-20 17:51:13,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:51:13,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:51:13,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:51:13,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:51:13,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,569 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 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]. [2024-11-20 17:51:13,569 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,569 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:51:13,617 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:51:13,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:51:13,618 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:51:13,622 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (1/1) ... [2024-11-20 17:51:13,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:51:13,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:13,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:51:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:51:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:51:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:51:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:51:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:51:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:51:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:51:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:51:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:51:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:51:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:51:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:51:13,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:51:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:51:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:51:13,756 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:51:13,854 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:51:13,855 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:51:14,241 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:51:14,241 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:51:14,486 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:51:14,487 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-20 17:51:14,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:51:14 BoogieIcfgContainer [2024-11-20 17:51:14,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:51:14,489 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:51:14,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:51:14,493 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:51:14,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:51:13" (1/3) ... [2024-11-20 17:51:14,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e3dc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:51:14, skipping insertion in model container [2024-11-20 17:51:14,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:51:13" (2/3) ... [2024-11-20 17:51:14,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e3dc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:51:14, skipping insertion in model container [2024-11-20 17:51:14,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:51:14" (3/3) ... [2024-11-20 17:51:14,497 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2024-11-20 17:51:14,514 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:51:14,514 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-20 17:51:14,515 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:51:14,572 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:51:14,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 126 flow [2024-11-20 17:51:14,645 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-11-20 17:51:14,646 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:51:14,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 6/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 149 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-20 17:51:14,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 126 flow [2024-11-20 17:51:14,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 53 transitions, 118 flow [2024-11-20 17:51:14,667 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:51:14,676 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;@2a802b1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:51:14,676 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-20 17:51:14,680 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:51:14,681 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:51:14,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:51:14,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:14,682 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:51:14,682 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:14,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash 597900, now seen corresponding path program 1 times [2024-11-20 17:51:14,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:14,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383545075] [2024-11-20 17:51:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:14,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:14,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383545075] [2024-11-20 17:51:14,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383545075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:14,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:14,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:51:14,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028108946] [2024-11-20 17:51:14,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:14,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:51:14,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:51:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:51:15,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-20 17:51:15,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:15,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:15,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-20 17:51:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:15,269 INFO L124 PetriNetUnfolderBase]: 182/445 cut-off events. [2024-11-20 17:51:15,269 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-20 17:51:15,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 445 events. 182/445 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2484 event pairs, 119 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 670. Up to 293 conditions per place. [2024-11-20 17:51:15,276 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 27 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-11-20 17:51:15,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 170 flow [2024-11-20 17:51:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:51:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:51:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-20 17:51:15,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-11-20 17:51:15,292 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 118 flow. Second operand 3 states and 103 transitions. [2024-11-20 17:51:15,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 170 flow [2024-11-20 17:51:15,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:51:15,301 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 108 flow [2024-11-20 17:51:15,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-11-20 17:51:15,307 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-11-20 17:51:15,310 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 108 flow [2024-11-20 17:51:15,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:15,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:15,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:51:15,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:51:15,311 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:15,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 597901, now seen corresponding path program 1 times [2024-11-20 17:51:15,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:15,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002404090] [2024-11-20 17:51:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:15,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:15,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:15,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002404090] [2024-11-20 17:51:15,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002404090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:15,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:15,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:51:15,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132994378] [2024-11-20 17:51:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:15,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:51:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:51:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:51:15,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-20 17:51:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:15,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:15,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-20 17:51:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:15,838 INFO L124 PetriNetUnfolderBase]: 183/448 cut-off events. [2024-11-20 17:51:15,838 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-20 17:51:15,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 448 events. 183/448 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2495 event pairs, 119 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 736. Up to 298 conditions per place. [2024-11-20 17:51:15,844 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 30 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-20 17:51:15,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 182 flow [2024-11-20 17:51:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:51:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:51:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-20 17:51:15,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-20 17:51:15,847 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 108 flow. Second operand 3 states and 106 transitions. [2024-11-20 17:51:15,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 182 flow [2024-11-20 17:51:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:51:15,849 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 123 flow [2024-11-20 17:51:15,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2024-11-20 17:51:15,851 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-20 17:51:15,851 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 123 flow [2024-11-20 17:51:15,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:15,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:15,853 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:51:15,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:51:15,854 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:15,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 574602240, now seen corresponding path program 1 times [2024-11-20 17:51:15,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828718025] [2024-11-20 17:51:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:16,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828718025] [2024-11-20 17:51:16,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828718025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360910792] [2024-11-20 17:51:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:16,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:16,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:16,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:51:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:16,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:51:16,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:16,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:51:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:16,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:16,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360910792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:16,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:16,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:51:16,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918612171] [2024-11-20 17:51:16,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:16,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:51:16,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:16,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:51:16,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:51:16,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-20 17:51:16,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 123 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:16,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:16,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-20 17:51:16,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:17,107 INFO L124 PetriNetUnfolderBase]: 183/447 cut-off events. [2024-11-20 17:51:17,108 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-20 17:51:17,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 447 events. 183/447 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2489 event pairs, 119 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 736. Up to 294 conditions per place. [2024-11-20 17:51:17,113 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 26 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-11-20 17:51:17,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 185 flow [2024-11-20 17:51:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-20 17:51:17,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-11-20 17:51:17,118 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 123 flow. Second operand 5 states and 153 transitions. [2024-11-20 17:51:17,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 185 flow [2024-11-20 17:51:17,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:51:17,121 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 136 flow [2024-11-20 17:51:17,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-11-20 17:51:17,123 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-11-20 17:51:17,123 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 136 flow [2024-11-20 17:51:17,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:17,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:17,124 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:51:17,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:17,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:17,328 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:17,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash 635151810, now seen corresponding path program 1 times [2024-11-20 17:51:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:17,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891976102] [2024-11-20 17:51:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:17,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891976102] [2024-11-20 17:51:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891976102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:17,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:17,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:51:17,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331513955] [2024-11-20 17:51:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:17,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:51:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:51:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:51:17,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-20 17:51:17,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:17,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:17,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-20 17:51:17,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:17,508 INFO L124 PetriNetUnfolderBase]: 182/446 cut-off events. [2024-11-20 17:51:17,508 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 17:51:17,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 446 events. 182/446 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2473 event pairs, 119 based on Foata normal form. 1/351 useless extension candidates. Maximal degree in co-relation 736. Up to 296 conditions per place. [2024-11-20 17:51:17,514 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-20 17:51:17,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 192 flow [2024-11-20 17:51:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:51:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:51:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-20 17:51:17,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-11-20 17:51:17,516 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 136 flow. Second operand 3 states and 107 transitions. [2024-11-20 17:51:17,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 192 flow [2024-11-20 17:51:17,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 182 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:17,519 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 124 flow [2024-11-20 17:51:17,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-11-20 17:51:17,520 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2024-11-20 17:51:17,520 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 124 flow [2024-11-20 17:51:17,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:17,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:17,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:17,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:51:17,521 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:17,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1761357714, now seen corresponding path program 1 times [2024-11-20 17:51:17,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:17,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498598755] [2024-11-20 17:51:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:17,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498598755] [2024-11-20 17:51:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498598755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:17,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:51:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132288360] [2024-11-20 17:51:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:17,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:51:17,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:51:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:51:17,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-20 17:51:17,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:17,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:17,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-20 17:51:17,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:17,725 INFO L124 PetriNetUnfolderBase]: 182/385 cut-off events. [2024-11-20 17:51:17,725 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 17:51:17,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 385 events. 182/385 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1759 event pairs, 119 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 685. Up to 292 conditions per place. [2024-11-20 17:51:17,728 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-20 17:51:17,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 170 flow [2024-11-20 17:51:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:51:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:51:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-20 17:51:17,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-11-20 17:51:17,733 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 124 flow. Second operand 4 states and 101 transitions. [2024-11-20 17:51:17,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 170 flow [2024-11-20 17:51:17,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:51:17,736 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 108 flow [2024-11-20 17:51:17,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-20 17:51:17,737 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2024-11-20 17:51:17,737 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 108 flow [2024-11-20 17:51:17,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:17,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:17,741 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:17,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:51:17,742 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:17,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1761357713, now seen corresponding path program 1 times [2024-11-20 17:51:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:17,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387582627] [2024-11-20 17:51:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:17,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:17,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387582627] [2024-11-20 17:51:17,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387582627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:17,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433527163] [2024-11-20 17:51:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:17,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:17,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:17,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:51:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:17,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:51:17,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:18,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:18,144 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 [2024-11-20 17:51:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:18,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433527163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:18,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:18,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:51:18,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524503030] [2024-11-20 17:51:18,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:18,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:51:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:51:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:51:18,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-20 17:51:18,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 108 flow. Second operand has 11 states, 11 states have (on average 26.181818181818183) internal successors, (288), 11 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:18,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:18,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-20 17:51:18,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:18,687 INFO L124 PetriNetUnfolderBase]: 417/754 cut-off events. [2024-11-20 17:51:18,687 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-20 17:51:18,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1426 conditions, 754 events. 417/754 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3676 event pairs, 140 based on Foata normal form. 0/639 useless extension candidates. Maximal degree in co-relation 1401. Up to 378 conditions per place. [2024-11-20 17:51:18,692 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 51 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-20 17:51:18,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 267 flow [2024-11-20 17:51:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-11-20 17:51:18,693 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-20 17:51:18,693 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 108 flow. Second operand 5 states and 176 transitions. [2024-11-20 17:51:18,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 267 flow [2024-11-20 17:51:18,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:51:18,695 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 121 flow [2024-11-20 17:51:18,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-11-20 17:51:18,695 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2024-11-20 17:51:18,695 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 121 flow [2024-11-20 17:51:18,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.181818181818183) internal successors, (288), 11 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:18,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:18,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:18,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:18,900 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 [2024-11-20 17:51:18,901 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:18,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash -496334376, now seen corresponding path program 1 times [2024-11-20 17:51:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432927434] [2024-11-20 17:51:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:19,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:19,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432927434] [2024-11-20 17:51:19,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432927434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372665101] [2024-11-20 17:51:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:19,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:51:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:19,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:51:19,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:19,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:19,275 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 [2024-11-20 17:51:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:19,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372665101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:19,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:19,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:51:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631271265] [2024-11-20 17:51:19,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:19,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:51:19,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:51:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:51:19,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-20 17:51:19,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 121 flow. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:19,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:19,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-20 17:51:19,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:19,813 INFO L124 PetriNetUnfolderBase]: 756/1283 cut-off events. [2024-11-20 17:51:19,813 INFO L125 PetriNetUnfolderBase]: For 161/209 co-relation queries the response was YES. [2024-11-20 17:51:19,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2670 conditions, 1283 events. 756/1283 cut-off events. For 161/209 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6048 event pairs, 165 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 2642. Up to 849 conditions per place. [2024-11-20 17:51:19,820 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 51 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-11-20 17:51:19,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 282 flow [2024-11-20 17:51:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-11-20 17:51:19,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-20 17:51:19,822 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 121 flow. Second operand 5 states and 150 transitions. [2024-11-20 17:51:19,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 282 flow [2024-11-20 17:51:19,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 275 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:19,823 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 158 flow [2024-11-20 17:51:19,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-20 17:51:19,824 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-20 17:51:19,824 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 158 flow [2024-11-20 17:51:19,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:19,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:19,825 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:19,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:20,025 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 [2024-11-20 17:51:20,026 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:20,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash -447627277, now seen corresponding path program 1 times [2024-11-20 17:51:20,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:20,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015250906] [2024-11-20 17:51:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:20,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:20,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:20,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015250906] [2024-11-20 17:51:20,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015250906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:20,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594131577] [2024-11-20 17:51:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:20,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:20,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:20,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:51:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:20,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:51:20,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:20,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:20,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-20 17:51:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:20,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594131577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:20,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:20,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-20 17:51:20,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334885170] [2024-11-20 17:51:20,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:20,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 17:51:20,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 17:51:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:51:21,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-20 17:51:21,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 158 flow. Second operand has 17 states, 17 states have (on average 25.764705882352942) internal successors, (438), 17 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:21,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:21,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-20 17:51:21,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:21,705 INFO L124 PetriNetUnfolderBase]: 1262/2336 cut-off events. [2024-11-20 17:51:21,705 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-20 17:51:21,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5074 conditions, 2336 events. 1262/2336 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14150 event pairs, 626 based on Foata normal form. 0/2033 useless extension candidates. Maximal degree in co-relation 2689. Up to 1023 conditions per place. [2024-11-20 17:51:21,720 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 103 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-11-20 17:51:21,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 128 transitions, 634 flow [2024-11-20 17:51:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:51:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:51:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 296 transitions. [2024-11-20 17:51:21,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-11-20 17:51:21,722 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 158 flow. Second operand 8 states and 296 transitions. [2024-11-20 17:51:21,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 128 transitions, 634 flow [2024-11-20 17:51:21,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 128 transitions, 612 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:21,727 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 270 flow [2024-11-20 17:51:21,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-11-20 17:51:21,729 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-20 17:51:21,729 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 270 flow [2024-11-20 17:51:21,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.764705882352942) internal successors, (438), 17 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:21,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:21,730 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:21,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:51:21,930 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 [2024-11-20 17:51:21,931 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:21,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1793504182, now seen corresponding path program 1 times [2024-11-20 17:51:21,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:21,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898167729] [2024-11-20 17:51:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:21,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898167729] [2024-11-20 17:51:22,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898167729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:22,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428569419] [2024-11-20 17:51:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:22,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:22,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:22,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:22,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:51:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:22,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:51:22,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:22,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:22,248 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 [2024-11-20 17:51:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:22,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428569419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:22,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:22,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-20 17:51:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101455130] [2024-11-20 17:51:22,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:22,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:51:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:51:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:51:22,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-20 17:51:22,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 270 flow. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:22,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:22,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-20 17:51:22,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:23,078 INFO L124 PetriNetUnfolderBase]: 1573/2649 cut-off events. [2024-11-20 17:51:23,079 INFO L125 PetriNetUnfolderBase]: For 1645/1741 co-relation queries the response was YES. [2024-11-20 17:51:23,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6668 conditions, 2649 events. 1573/2649 cut-off events. For 1645/1741 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14409 event pairs, 734 based on Foata normal form. 0/2346 useless extension candidates. Maximal degree in co-relation 4111. Up to 2029 conditions per place. [2024-11-20 17:51:23,093 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 82 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2024-11-20 17:51:23,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 593 flow [2024-11-20 17:51:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:51:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:51:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-11-20 17:51:23,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-11-20 17:51:23,095 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 270 flow. Second operand 7 states and 216 transitions. [2024-11-20 17:51:23,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 593 flow [2024-11-20 17:51:23,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:51:23,101 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 338 flow [2024-11-20 17:51:23,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-11-20 17:51:23,102 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-20 17:51:23,102 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 338 flow [2024-11-20 17:51:23,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:23,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:23,103 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:23,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:23,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:23,307 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:23,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash -606417888, now seen corresponding path program 2 times [2024-11-20 17:51:23,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:23,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074626593] [2024-11-20 17:51:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:23,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:51:23,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:23,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074626593] [2024-11-20 17:51:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074626593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:23,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943672476] [2024-11-20 17:51:23,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:51:23,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:23,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:23,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:51:23,540 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:51:23,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:51:23,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:51:23,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:23,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:51:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:51:23,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:51:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943672476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:23,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-20 17:51:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747885709] [2024-11-20 17:51:23,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:23,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:51:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:51:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:51:24,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-20 17:51:24,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 338 flow. Second operand has 12 states, 12 states have (on average 26.583333333333332) internal successors, (319), 12 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) [2024-11-20 17:51:24,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:24,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-20 17:51:24,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:24,680 INFO L124 PetriNetUnfolderBase]: 1234/2242 cut-off events. [2024-11-20 17:51:24,681 INFO L125 PetriNetUnfolderBase]: For 1270/1270 co-relation queries the response was YES. [2024-11-20 17:51:24,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5748 conditions, 2242 events. 1234/2242 cut-off events. For 1270/1270 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13351 event pairs, 637 based on Foata normal form. 0/2170 useless extension candidates. Maximal degree in co-relation 3672. Up to 1437 conditions per place. [2024-11-20 17:51:24,696 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 70 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-20 17:51:24,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 640 flow [2024-11-20 17:51:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-20 17:51:24,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-11-20 17:51:24,698 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 338 flow. Second operand 5 states and 167 transitions. [2024-11-20 17:51:24,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 640 flow [2024-11-20 17:51:24,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 605 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:51:24,705 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 328 flow [2024-11-20 17:51:24,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-11-20 17:51:24,706 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-11-20 17:51:24,706 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 328 flow [2024-11-20 17:51:24,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.583333333333332) internal successors, (319), 12 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) [2024-11-20 17:51:24,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:24,708 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:24,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:51:24,912 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 [2024-11-20 17:51:24,913 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:24,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1165962537, now seen corresponding path program 2 times [2024-11-20 17:51:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456997014] [2024-11-20 17:51:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:25,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:25,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456997014] [2024-11-20 17:51:25,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456997014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:25,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:25,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:51:25,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104096101] [2024-11-20 17:51:25,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:25,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:51:25,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:25,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:51:25,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:51:25,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-20 17:51:25,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:25,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:25,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-20 17:51:25,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:25,524 INFO L124 PetriNetUnfolderBase]: 1230/2070 cut-off events. [2024-11-20 17:51:25,524 INFO L125 PetriNetUnfolderBase]: For 2334/2334 co-relation queries the response was YES. [2024-11-20 17:51:25,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 2070 events. 1230/2070 cut-off events. For 2334/2334 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10809 event pairs, 402 based on Foata normal form. 64/2043 useless extension candidates. Maximal degree in co-relation 3570. Up to 991 conditions per place. [2024-11-20 17:51:25,539 INFO L140 encePairwiseOnDemand]: 39/56 looper letters, 41 selfloop transitions, 21 changer transitions 0/66 dead transitions. [2024-11-20 17:51:25,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 495 flow [2024-11-20 17:51:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-20 17:51:25,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-20 17:51:25,540 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 328 flow. Second operand 5 states and 132 transitions. [2024-11-20 17:51:25,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 495 flow [2024-11-20 17:51:25,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 461 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:51:25,545 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 322 flow [2024-11-20 17:51:25,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-20 17:51:25,545 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-11-20 17:51:25,545 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 322 flow [2024-11-20 17:51:25,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:25,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:25,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:25,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:51:25,546 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:25,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash 380842964, now seen corresponding path program 1 times [2024-11-20 17:51:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420388099] [2024-11-20 17:51:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420388099] [2024-11-20 17:51:25,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420388099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:25,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:25,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:51:25,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342252636] [2024-11-20 17:51:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:25,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:51:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:51:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:51:25,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-20 17:51:25,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:25,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:25,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-20 17:51:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:25,800 INFO L124 PetriNetUnfolderBase]: 1258/2082 cut-off events. [2024-11-20 17:51:25,801 INFO L125 PetriNetUnfolderBase]: For 1868/1868 co-relation queries the response was YES. [2024-11-20 17:51:25,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 2082 events. 1258/2082 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10602 event pairs, 317 based on Foata normal form. 2/2062 useless extension candidates. Maximal degree in co-relation 3761. Up to 1590 conditions per place. [2024-11-20 17:51:25,814 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 59 selfloop transitions, 11 changer transitions 1/75 dead transitions. [2024-11-20 17:51:25,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 549 flow [2024-11-20 17:51:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:51:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:51:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-20 17:51:25,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7440476190476191 [2024-11-20 17:51:25,816 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 322 flow. Second operand 3 states and 125 transitions. [2024-11-20 17:51:25,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 549 flow [2024-11-20 17:51:25,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 493 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:51:25,824 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 361 flow [2024-11-20 17:51:25,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=55, PETRI_TRANSITIONS=60} [2024-11-20 17:51:25,824 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2024-11-20 17:51:25,825 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 361 flow [2024-11-20 17:51:25,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:25,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:25,825 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:25,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:51:25,825 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:25,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash 115988913, now seen corresponding path program 1 times [2024-11-20 17:51:25,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:25,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643769912] [2024-11-20 17:51:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:25,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:25,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643769912] [2024-11-20 17:51:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643769912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:25,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:25,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:51:25,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868305968] [2024-11-20 17:51:25,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:25,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:51:25,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:51:25,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:51:25,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-20 17:51:25,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:25,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:25,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-20 17:51:25,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:26,278 INFO L124 PetriNetUnfolderBase]: 1332/2200 cut-off events. [2024-11-20 17:51:26,279 INFO L125 PetriNetUnfolderBase]: For 2033/2033 co-relation queries the response was YES. [2024-11-20 17:51:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6089 conditions, 2200 events. 1332/2200 cut-off events. For 2033/2033 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11837 event pairs, 471 based on Foata normal form. 12/2020 useless extension candidates. Maximal degree in co-relation 3968. Up to 1220 conditions per place. [2024-11-20 17:51:26,287 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 114 selfloop transitions, 9 changer transitions 0/125 dead transitions. [2024-11-20 17:51:26,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 125 transitions, 932 flow [2024-11-20 17:51:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-11-20 17:51:26,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-20 17:51:26,289 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 361 flow. Second operand 5 states and 195 transitions. [2024-11-20 17:51:26,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 125 transitions, 932 flow [2024-11-20 17:51:26,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 125 transitions, 885 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-20 17:51:26,294 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 411 flow [2024-11-20 17:51:26,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-11-20 17:51:26,294 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-11-20 17:51:26,294 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 411 flow [2024-11-20 17:51:26,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:26,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:26,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:26,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 17:51:26,295 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:26,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash -151584609, now seen corresponding path program 2 times [2024-11-20 17:51:26,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:26,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825040321] [2024-11-20 17:51:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:26,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:26,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:26,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825040321] [2024-11-20 17:51:26,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825040321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:26,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:26,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:51:26,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560089056] [2024-11-20 17:51:26,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:26,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:51:26,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:26,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:51:26,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:51:26,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:26,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 411 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:26,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:26,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:26,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:26,674 INFO L124 PetriNetUnfolderBase]: 1058/1742 cut-off events. [2024-11-20 17:51:26,674 INFO L125 PetriNetUnfolderBase]: For 2578/2578 co-relation queries the response was YES. [2024-11-20 17:51:26,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5307 conditions, 1742 events. 1058/1742 cut-off events. For 2578/2578 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8233 event pairs, 575 based on Foata normal form. 0/1678 useless extension candidates. Maximal degree in co-relation 3296. Up to 1413 conditions per place. [2024-11-20 17:51:26,684 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 68 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-11-20 17:51:26,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 647 flow [2024-11-20 17:51:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:51:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:51:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-20 17:51:26,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-11-20 17:51:26,685 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 411 flow. Second operand 4 states and 138 transitions. [2024-11-20 17:51:26,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 647 flow [2024-11-20 17:51:26,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 620 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-20 17:51:26,691 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 367 flow [2024-11-20 17:51:26,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=367, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-11-20 17:51:26,692 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-11-20 17:51:26,692 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 367 flow [2024-11-20 17:51:26,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:26,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:26,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:26,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 17:51:26,692 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:26,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash 971436394, now seen corresponding path program 1 times [2024-11-20 17:51:26,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:26,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160258754] [2024-11-20 17:51:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:26,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:26,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160258754] [2024-11-20 17:51:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160258754] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:26,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:26,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:51:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721710555] [2024-11-20 17:51:26,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:26,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:51:26,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:51:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:51:26,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:26,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 367 flow. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:26,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:26,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:27,200 INFO L124 PetriNetUnfolderBase]: 1244/2068 cut-off events. [2024-11-20 17:51:27,201 INFO L125 PetriNetUnfolderBase]: For 3142/3142 co-relation queries the response was YES. [2024-11-20 17:51:27,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6564 conditions, 2068 events. 1244/2068 cut-off events. For 3142/3142 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10867 event pairs, 373 based on Foata normal form. 32/2054 useless extension candidates. Maximal degree in co-relation 4155. Up to 1018 conditions per place. [2024-11-20 17:51:27,213 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 98 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-11-20 17:51:27,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 119 transitions, 923 flow [2024-11-20 17:51:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:51:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:51:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-11-20 17:51:27,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2024-11-20 17:51:27,215 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 367 flow. Second operand 6 states and 219 transitions. [2024-11-20 17:51:27,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 119 transitions, 923 flow [2024-11-20 17:51:27,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 119 transitions, 880 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 17:51:27,224 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 550 flow [2024-11-20 17:51:27,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-11-20 17:51:27,226 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-11-20 17:51:27,226 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 550 flow [2024-11-20 17:51:27,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:27,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:27,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:27,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:51:27,227 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:27,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1347014086, now seen corresponding path program 2 times [2024-11-20 17:51:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:27,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583889139] [2024-11-20 17:51:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:27,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:27,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:27,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583889139] [2024-11-20 17:51:27,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583889139] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:27,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:27,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:51:27,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600550722] [2024-11-20 17:51:27,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:27,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:51:27,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:51:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:51:27,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:27,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:27,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:27,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:27,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:27,637 INFO L124 PetriNetUnfolderBase]: 1276/2132 cut-off events. [2024-11-20 17:51:27,638 INFO L125 PetriNetUnfolderBase]: For 5155/5155 co-relation queries the response was YES. [2024-11-20 17:51:27,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7352 conditions, 2132 events. 1276/2132 cut-off events. For 5155/5155 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10767 event pairs, 577 based on Foata normal form. 0/2100 useless extension candidates. Maximal degree in co-relation 5253. Up to 1439 conditions per place. [2024-11-20 17:51:27,652 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 86 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-11-20 17:51:27,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 1022 flow [2024-11-20 17:51:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-20 17:51:27,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-11-20 17:51:27,654 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 550 flow. Second operand 5 states and 167 transitions. [2024-11-20 17:51:27,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 1022 flow [2024-11-20 17:51:27,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 990 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-20 17:51:27,664 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 597 flow [2024-11-20 17:51:27,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=597, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-11-20 17:51:27,665 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-11-20 17:51:27,665 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 597 flow [2024-11-20 17:51:27,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:27,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:27,666 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:27,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 17:51:27,666 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:27,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash 189889830, now seen corresponding path program 1 times [2024-11-20 17:51:27,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:27,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125506208] [2024-11-20 17:51:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:27,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:27,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125506208] [2024-11-20 17:51:27,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125506208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:27,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:27,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:51:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485063694] [2024-11-20 17:51:27,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:27,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:51:27,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:51:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:51:27,823 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:27,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 597 flow. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:27,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:27,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:27,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:28,198 INFO L124 PetriNetUnfolderBase]: 1596/2688 cut-off events. [2024-11-20 17:51:28,198 INFO L125 PetriNetUnfolderBase]: For 7454/7454 co-relation queries the response was YES. [2024-11-20 17:51:28,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9429 conditions, 2688 events. 1596/2688 cut-off events. For 7454/7454 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14051 event pairs, 587 based on Foata normal form. 32/2720 useless extension candidates. Maximal degree in co-relation 8185. Up to 1395 conditions per place. [2024-11-20 17:51:28,216 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 102 selfloop transitions, 26 changer transitions 0/129 dead transitions. [2024-11-20 17:51:28,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 1211 flow [2024-11-20 17:51:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:51:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:51:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-11-20 17:51:28,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5943877551020408 [2024-11-20 17:51:28,218 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 597 flow. Second operand 7 states and 233 transitions. [2024-11-20 17:51:28,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 1211 flow [2024-11-20 17:51:28,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1177 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:28,233 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 753 flow [2024-11-20 17:51:28,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-11-20 17:51:28,233 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-11-20 17:51:28,234 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 753 flow [2024-11-20 17:51:28,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:28,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:28,234 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:28,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:51:28,234 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:28,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1548085212, now seen corresponding path program 2 times [2024-11-20 17:51:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:28,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664718476] [2024-11-20 17:51:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:28,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:28,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664718476] [2024-11-20 17:51:28,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664718476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:28,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:28,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:51:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107425710] [2024-11-20 17:51:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:28,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:51:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:51:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:51:28,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:28,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 753 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:28,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:28,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:28,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:28,677 INFO L124 PetriNetUnfolderBase]: 1568/2612 cut-off events. [2024-11-20 17:51:28,677 INFO L125 PetriNetUnfolderBase]: For 9514/9514 co-relation queries the response was YES. [2024-11-20 17:51:28,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9863 conditions, 2612 events. 1568/2612 cut-off events. For 9514/9514 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13801 event pairs, 589 based on Foata normal form. 6/2618 useless extension candidates. Maximal degree in co-relation 8835. Up to 1318 conditions per place. [2024-11-20 17:51:28,694 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 90 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-11-20 17:51:28,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1223 flow [2024-11-20 17:51:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-20 17:51:28,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-11-20 17:51:28,696 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 753 flow. Second operand 5 states and 183 transitions. [2024-11-20 17:51:28,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1223 flow [2024-11-20 17:51:28,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1173 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:28,719 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 843 flow [2024-11-20 17:51:28,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2024-11-20 17:51:28,720 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-11-20 17:51:28,720 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 843 flow [2024-11-20 17:51:28,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:28,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:28,722 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:28,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 17:51:28,722 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:28,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1366785052, now seen corresponding path program 3 times [2024-11-20 17:51:28,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:28,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619041635] [2024-11-20 17:51:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:28,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619041635] [2024-11-20 17:51:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619041635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:28,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:28,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:51:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247863681] [2024-11-20 17:51:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:28,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:51:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:51:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:51:28,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:28,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 843 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:28,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:28,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:28,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:29,208 INFO L124 PetriNetUnfolderBase]: 1562/2606 cut-off events. [2024-11-20 17:51:29,208 INFO L125 PetriNetUnfolderBase]: For 11888/11888 co-relation queries the response was YES. [2024-11-20 17:51:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10191 conditions, 2606 events. 1562/2606 cut-off events. For 11888/11888 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13360 event pairs, 861 based on Foata normal form. 6/2612 useless extension candidates. Maximal degree in co-relation 9247. Up to 2153 conditions per place. [2024-11-20 17:51:29,228 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 75 selfloop transitions, 35 changer transitions 0/111 dead transitions. [2024-11-20 17:51:29,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 111 transitions, 1314 flow [2024-11-20 17:51:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-20 17:51:29,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-11-20 17:51:29,230 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 843 flow. Second operand 5 states and 169 transitions. [2024-11-20 17:51:29,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 111 transitions, 1314 flow [2024-11-20 17:51:29,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 111 transitions, 1258 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-20 17:51:29,255 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 1095 flow [2024-11-20 17:51:29,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1095, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2024-11-20 17:51:29,256 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-11-20 17:51:29,256 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 1095 flow [2024-11-20 17:51:29,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:29,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:29,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:29,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 17:51:29,257 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:29,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash -149146254, now seen corresponding path program 4 times [2024-11-20 17:51:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:29,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171340365] [2024-11-20 17:51:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171340365] [2024-11-20 17:51:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171340365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:29,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:29,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:51:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432051499] [2024-11-20 17:51:29,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:29,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:51:29,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:51:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:51:29,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:29,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 1095 flow. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:29,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:29,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:29,728 INFO L124 PetriNetUnfolderBase]: 1504/2494 cut-off events. [2024-11-20 17:51:29,728 INFO L125 PetriNetUnfolderBase]: For 12692/12692 co-relation queries the response was YES. [2024-11-20 17:51:29,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9825 conditions, 2494 events. 1504/2494 cut-off events. For 12692/12692 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12517 event pairs, 773 based on Foata normal form. 32/2526 useless extension candidates. Maximal degree in co-relation 8926. Up to 1961 conditions per place. [2024-11-20 17:51:29,742 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 83 selfloop transitions, 37 changer transitions 0/121 dead transitions. [2024-11-20 17:51:29,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 121 transitions, 1455 flow [2024-11-20 17:51:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:51:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:51:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-11-20 17:51:29,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-11-20 17:51:29,744 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 1095 flow. Second operand 6 states and 201 transitions. [2024-11-20 17:51:29,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 121 transitions, 1455 flow [2024-11-20 17:51:29,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 1405 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-20 17:51:29,769 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 1188 flow [2024-11-20 17:51:29,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1188, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-11-20 17:51:29,770 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 44 predicate places. [2024-11-20 17:51:29,770 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 1188 flow [2024-11-20 17:51:29,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:29,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:29,770 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:29,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 17:51:29,770 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:51:29,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1430305148, now seen corresponding path program 1 times [2024-11-20 17:51:29,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:29,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068175266] [2024-11-20 17:51:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:29,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:51:30,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068175266] [2024-11-20 17:51:30,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068175266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596049127] [2024-11-20 17:51:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:30,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:30,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:30,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:30,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:51:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:30,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:51:30,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:30,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:51:30,301 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 15 treesize of output 7 [2024-11-20 17:51:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:30,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:30,570 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 33 treesize of output 29 [2024-11-20 17:51:30,584 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:51:30,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-20 17:51:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596049127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:30,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:30,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-20 17:51:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895439020] [2024-11-20 17:51:30,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:30,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:51:30,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:51:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:51:31,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:51:31,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 1188 flow. Second operand has 20 states, 20 states have (on average 25.25) internal successors, (505), 20 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:31,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:31,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:51:31,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:36,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:51:40,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:51:44,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:51:48,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:51:52,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:57,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:52:01,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:52:05,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:52:09,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:52:13,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:52:17,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-20 17:52:18,630 INFO L124 PetriNetUnfolderBase]: 3049/5091 cut-off events. [2024-11-20 17:52:18,630 INFO L125 PetriNetUnfolderBase]: For 18936/18936 co-relation queries the response was YES. [2024-11-20 17:52:18,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18553 conditions, 5091 events. 3049/5091 cut-off events. For 18936/18936 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 29089 event pairs, 316 based on Foata normal form. 53/5144 useless extension candidates. Maximal degree in co-relation 17243. Up to 867 conditions per place. [2024-11-20 17:52:18,658 INFO L140 encePairwiseOnDemand]: 36/56 looper letters, 253 selfloop transitions, 125 changer transitions 212/591 dead transitions. [2024-11-20 17:52:18,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 591 transitions, 5073 flow [2024-11-20 17:52:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-20 17:52:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-20 17:52:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1556 transitions. [2024-11-20 17:52:18,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5911854103343465 [2024-11-20 17:52:18,668 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 1188 flow. Second operand 47 states and 1556 transitions. [2024-11-20 17:52:18,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 591 transitions, 5073 flow [2024-11-20 17:52:18,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 591 transitions, 4887 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-11-20 17:52:18,728 INFO L231 Difference]: Finished difference. Result has 179 places, 173 transitions, 2265 flow [2024-11-20 17:52:18,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2265, PETRI_PLACES=179, PETRI_TRANSITIONS=173} [2024-11-20 17:52:18,730 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2024-11-20 17:52:18,730 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 173 transitions, 2265 flow [2024-11-20 17:52:18,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.25) internal successors, (505), 20 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:18,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:18,731 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:18,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:52:18,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:18,936 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:52:18,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash 279520028, now seen corresponding path program 2 times [2024-11-20 17:52:18,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:18,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376459688] [2024-11-20 17:52:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:18,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:52:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376459688] [2024-11-20 17:52:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376459688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:19,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:19,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-20 17:52:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104456489] [2024-11-20 17:52:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:19,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:52:19,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:52:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:52:19,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:52:19,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 173 transitions, 2265 flow. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 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) [2024-11-20 17:52:19,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:19,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:52:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:19,930 INFO L124 PetriNetUnfolderBase]: 2048/3528 cut-off events. [2024-11-20 17:52:19,930 INFO L125 PetriNetUnfolderBase]: For 37876/37876 co-relation queries the response was YES. [2024-11-20 17:52:19,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19711 conditions, 3528 events. 2048/3528 cut-off events. For 37876/37876 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19240 event pairs, 878 based on Foata normal form. 40/3568 useless extension candidates. Maximal degree in co-relation 19548. Up to 2216 conditions per place. [2024-11-20 17:52:19,955 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 181 selfloop transitions, 69 changer transitions 8/259 dead transitions. [2024-11-20 17:52:19,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 259 transitions, 3586 flow [2024-11-20 17:52:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:52:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:52:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 270 transitions. [2024-11-20 17:52:19,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6026785714285714 [2024-11-20 17:52:19,956 INFO L175 Difference]: Start difference. First operand has 179 places, 173 transitions, 2265 flow. Second operand 8 states and 270 transitions. [2024-11-20 17:52:19,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 259 transitions, 3586 flow [2024-11-20 17:52:20,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 259 transitions, 3170 flow, removed 168 selfloop flow, removed 17 redundant places. [2024-11-20 17:52:20,139 INFO L231 Difference]: Finished difference. Result has 158 places, 191 transitions, 2330 flow [2024-11-20 17:52:20,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2330, PETRI_PLACES=158, PETRI_TRANSITIONS=191} [2024-11-20 17:52:20,140 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 104 predicate places. [2024-11-20 17:52:20,140 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 191 transitions, 2330 flow [2024-11-20 17:52:20,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 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) [2024-11-20 17:52:20,140 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:20,140 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:20,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-20 17:52:20,140 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:52:20,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:20,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1533764064, now seen corresponding path program 3 times [2024-11-20 17:52:20,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:20,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824336938] [2024-11-20 17:52:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:52:20,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:20,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824336938] [2024-11-20 17:52:20,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824336938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:52:20,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403020594] [2024-11-20 17:52:20,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:52:20,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:20,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:20,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:20,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:52:20,445 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:52:20,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:52:20,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 17:52:20,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:20,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:52:20,593 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 15 treesize of output 7 [2024-11-20 17:52:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:20,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:52:20,805 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 33 treesize of output 29 [2024-11-20 17:52:20,816 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:52:20,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-20 17:52:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:20,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403020594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:52:20,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:52:20,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-20 17:52:20,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110518088] [2024-11-20 17:52:20,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:52:20,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:52:20,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:52:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:52:21,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:52:21,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 191 transitions, 2330 flow. Second operand has 18 states, 18 states have (on average 25.5) internal successors, (459), 18 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:21,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:21,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:52:21,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:23,189 INFO L124 PetriNetUnfolderBase]: 2658/4540 cut-off events. [2024-11-20 17:52:23,189 INFO L125 PetriNetUnfolderBase]: For 42003/42003 co-relation queries the response was YES. [2024-11-20 17:52:23,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23731 conditions, 4540 events. 2658/4540 cut-off events. For 42003/42003 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 25718 event pairs, 544 based on Foata normal form. 40/4580 useless extension candidates. Maximal degree in co-relation 22489. Up to 2410 conditions per place. [2024-11-20 17:52:23,221 INFO L140 encePairwiseOnDemand]: 38/56 looper letters, 177 selfloop transitions, 101 changer transitions 119/398 dead transitions. [2024-11-20 17:52:23,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 398 transitions, 4901 flow [2024-11-20 17:52:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-20 17:52:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-20 17:52:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 842 transitions. [2024-11-20 17:52:23,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5369897959183674 [2024-11-20 17:52:23,223 INFO L175 Difference]: Start difference. First operand has 158 places, 191 transitions, 2330 flow. Second operand 28 states and 842 transitions. [2024-11-20 17:52:23,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 398 transitions, 4901 flow [2024-11-20 17:52:23,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 398 transitions, 4731 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-11-20 17:52:23,352 INFO L231 Difference]: Finished difference. Result has 188 places, 186 transitions, 2378 flow [2024-11-20 17:52:23,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2378, PETRI_PLACES=188, PETRI_TRANSITIONS=186} [2024-11-20 17:52:23,353 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 134 predicate places. [2024-11-20 17:52:23,353 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 186 transitions, 2378 flow [2024-11-20 17:52:23,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.5) internal successors, (459), 18 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:23,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:23,354 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:23,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:52:23,557 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,SelfDestructingSolverStorable22 [2024-11-20 17:52:23,558 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:52:23,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1385483065, now seen corresponding path program 4 times [2024-11-20 17:52:23,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:23,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618172367] [2024-11-20 17:52:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:52:23,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:23,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618172367] [2024-11-20 17:52:23,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618172367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:52:23,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608134087] [2024-11-20 17:52:23,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:52:23,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:23,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:23,732 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:23,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:52:23,829 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:52:23,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:52:23,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:52:23,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:52:23,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:52:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:52:24,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608134087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:52:24,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:52:24,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 16 [2024-11-20 17:52:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383126389] [2024-11-20 17:52:24,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:52:24,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:52:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:52:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:52:24,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:52:24,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 186 transitions, 2378 flow. Second operand has 16 states, 16 states have (on average 24.4375) internal successors, (391), 16 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:24,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:24,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:52:24,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:26,545 INFO L124 PetriNetUnfolderBase]: 2816/4787 cut-off events. [2024-11-20 17:52:26,546 INFO L125 PetriNetUnfolderBase]: For 61006/61006 co-relation queries the response was YES. [2024-11-20 17:52:26,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27643 conditions, 4787 events. 2816/4787 cut-off events. For 61006/61006 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 27080 event pairs, 455 based on Foata normal form. 27/4814 useless extension candidates. Maximal degree in co-relation 27530. Up to 1380 conditions per place. [2024-11-20 17:52:26,581 INFO L140 encePairwiseOnDemand]: 42/56 looper letters, 341 selfloop transitions, 159 changer transitions 13/514 dead transitions. [2024-11-20 17:52:26,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 514 transitions, 6489 flow [2024-11-20 17:52:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-20 17:52:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-20 17:52:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 945 transitions. [2024-11-20 17:52:26,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5818965517241379 [2024-11-20 17:52:26,584 INFO L175 Difference]: Start difference. First operand has 188 places, 186 transitions, 2378 flow. Second operand 29 states and 945 transitions. [2024-11-20 17:52:26,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 514 transitions, 6489 flow [2024-11-20 17:52:26,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 514 transitions, 5840 flow, removed 266 selfloop flow, removed 21 redundant places. [2024-11-20 17:52:26,745 INFO L231 Difference]: Finished difference. Result has 192 places, 289 transitions, 3946 flow [2024-11-20 17:52:26,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3946, PETRI_PLACES=192, PETRI_TRANSITIONS=289} [2024-11-20 17:52:26,746 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2024-11-20 17:52:26,746 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 289 transitions, 3946 flow [2024-11-20 17:52:26,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 24.4375) internal successors, (391), 16 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:26,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:26,746 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:26,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:52:26,950 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,SelfDestructingSolverStorable23 [2024-11-20 17:52:26,951 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:52:26,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash 319629423, now seen corresponding path program 5 times [2024-11-20 17:52:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:26,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41732451] [2024-11-20 17:52:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:52:27,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:27,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41732451] [2024-11-20 17:52:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41732451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:52:27,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440861110] [2024-11-20 17:52:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 17:52:27,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:27,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:27,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:27,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:52:27,275 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-20 17:52:27,275 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:52:27,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:52:27,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:52:27,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:52:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:52:32,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440861110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:52:32,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:52:32,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 18 [2024-11-20 17:52:32,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669092367] [2024-11-20 17:52:32,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:52:32,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:52:32,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:52:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:52:32,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-20 17:52:32,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 289 transitions, 3946 flow. Second operand has 18 states, 18 states have (on average 24.27777777777778) internal successors, (437), 18 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:32,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:32,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-20 17:52:32,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:37,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-20 17:52:42,024 INFO L124 PetriNetUnfolderBase]: 3788/6690 cut-off events. [2024-11-20 17:52:42,024 INFO L125 PetriNetUnfolderBase]: For 89757/89757 co-relation queries the response was YES. [2024-11-20 17:52:42,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40004 conditions, 6690 events. 3788/6690 cut-off events. For 89757/89757 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 43199 event pairs, 358 based on Foata normal form. 138/6828 useless extension candidates. Maximal degree in co-relation 39889. Up to 1441 conditions per place. [2024-11-20 17:52:42,079 INFO L140 encePairwiseOnDemand]: 37/56 looper letters, 467 selfloop transitions, 348 changer transitions 6/822 dead transitions. [2024-11-20 17:52:42,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 822 transitions, 10747 flow [2024-11-20 17:52:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-20 17:52:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-20 17:52:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1228 transitions. [2024-11-20 17:52:42,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6091269841269841 [2024-11-20 17:52:42,082 INFO L175 Difference]: Start difference. First operand has 192 places, 289 transitions, 3946 flow. Second operand 36 states and 1228 transitions. [2024-11-20 17:52:42,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 822 transitions, 10747 flow [2024-11-20 17:52:42,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 822 transitions, 9855 flow, removed 417 selfloop flow, removed 3 redundant places. [2024-11-20 17:52:42,549 INFO L231 Difference]: Finished difference. Result has 243 places, 520 transitions, 7658 flow [2024-11-20 17:52:42,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=3509, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7658, PETRI_PLACES=243, PETRI_TRANSITIONS=520} [2024-11-20 17:52:42,550 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 189 predicate places. [2024-11-20 17:52:42,550 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 520 transitions, 7658 flow [2024-11-20 17:52:42,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.27777777777778) internal successors, (437), 18 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:42,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:42,550 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:42,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:52:42,751 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,SelfDestructingSolverStorable24 [2024-11-20 17:52:42,752 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-20 17:52:42,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash -846416557, now seen corresponding path program 6 times [2024-11-20 17:52:42,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:42,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038843101] [2024-11-20 17:52:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:52:43,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038843101] [2024-11-20 17:52:43,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038843101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:52:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543251274] [2024-11-20 17:52:43,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 17:52:43,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:43,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:43,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:43,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process