./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:50:39,528 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:50:39,580 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:50:39,586 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:50:39,588 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:50:39,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:50:39,606 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:50:39,608 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:50:39,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:50:39,608 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:50:39,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:50:39,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:50:39,609 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:50:39,609 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:50:39,610 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:50:39,610 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:50:39,611 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:50:39,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:50:39,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:50:39,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:50:39,613 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:50:39,613 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:50:39,613 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:50:39,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:50:39,614 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:50:39,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:50:39,614 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:50:39,615 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:50:39,615 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:50:39,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:50:39,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:50:39,616 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:50:39,616 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:50:39,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:39,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:50:39,617 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:50:39,617 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:50:39,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:50:39,617 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:50:39,618 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:50:39,618 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:50:39,619 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:50:39,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-11-09 10:50:39,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:50:39,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:50:39,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:50:39,842 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:50:39,842 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:50:39,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-09 10:50:41,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:50:41,204 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:50:41,205 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-09 10:50:41,211 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/041e0a3c9/5d7ad5d0f08a41fe8aee978604fe62fb/FLAGd182578c6 [2024-11-09 10:50:41,222 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/041e0a3c9/5d7ad5d0f08a41fe8aee978604fe62fb [2024-11-09 10:50:41,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:50:41,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:50:41,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:41,227 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:50:41,233 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:50:41,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@caf8525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41, skipping insertion in model container [2024-11-09 10:50:41,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,253 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:50:41,398 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:50:41,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:41,408 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:50:41,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:41,440 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:50:41,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41 WrapperNode [2024-11-09 10:50:41,440 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:41,441 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:41,441 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:50:41,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:50:41,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,473 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 134 [2024-11-09 10:50:41,473 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:41,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:50:41,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:50:41,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:50:41,488 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,491 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,501 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-11-09 10:50:41,501 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,509 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:50:41,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:50:41,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:50:41,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:50:41,530 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (1/1) ... [2024-11-09 10:50:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:41,596 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) [2024-11-09 10:50:41,599 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 [2024-11-09 10:50:41,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:50:41,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:50:41,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:50:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:50:41,636 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:50:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:50:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:50:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:50:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:50:41,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:50:41,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:50:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:50:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:50:41,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:50:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:50:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:50:41,640 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:50:41,739 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:50:41,741 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:50:41,995 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:50:41,995 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:50:42,171 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:50:42,172 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:50:42,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:42 BoogieIcfgContainer [2024-11-09 10:50:42,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:50:42,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:50:42,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:50:42,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:50:42,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:50:41" (1/3) ... [2024-11-09 10:50:42,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d921edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:42, skipping insertion in model container [2024-11-09 10:50:42,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:41" (2/3) ... [2024-11-09 10:50:42,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d921edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:42, skipping insertion in model container [2024-11-09 10:50:42,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:42" (3/3) ... [2024-11-09 10:50:42,182 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-11-09 10:50:42,197 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:50:42,197 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-09 10:50:42,197 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:50:42,240 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:50:42,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 80 flow [2024-11-09 10:50:42,301 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2024-11-09 10:50:42,301 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:50:42,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 3/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 56 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-11-09 10:50:42,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 80 flow [2024-11-09 10:50:42,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 72 flow [2024-11-09 10:50:42,315 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:50:42,320 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;@24eb08b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:50:42,321 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-09 10:50:42,323 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:50:42,323 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:50:42,323 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:50:42,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:42,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:42,324 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:42,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:42,327 INFO L85 PathProgramCache]: Analyzing trace with hash 456406, now seen corresponding path program 1 times [2024-11-09 10:50:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:42,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007714660] [2024-11-09 10:50:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:42,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:42,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007714660] [2024-11-09 10:50:42,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007714660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:42,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:42,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:50:42,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138982148] [2024-11-09 10:50:42,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:42,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:42,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:42,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:42,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-11-09 10:50:42,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:42,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:42,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:42,678 INFO L124 PetriNetUnfolderBase]: 128/233 cut-off events. [2024-11-09 10:50:42,679 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-09 10:50:42,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 233 events. 128/233 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 987 event pairs, 100 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 428. Up to 221 conditions per place. [2024-11-09 10:50:42,684 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2024-11-09 10:50:42,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 112 flow [2024-11-09 10:50:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-11-09 10:50:42,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-11-09 10:50:42,696 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 46 transitions. [2024-11-09 10:50:42,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 112 flow [2024-11-09 10:50:42,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:42,700 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 62 flow [2024-11-09 10:50:42,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2024-11-09 10:50:42,705 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2024-11-09 10:50:42,705 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 62 flow [2024-11-09 10:50:42,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-11-09 10:50:42,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:42,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:42,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:50:42,707 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:42,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash 456407, now seen corresponding path program 1 times [2024-11-09 10:50:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:42,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361727045] [2024-11-09 10:50:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:42,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361727045] [2024-11-09 10:50:42,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361727045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:42,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:42,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:42,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491679405] [2024-11-09 10:50:42,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:42,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:42,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:42,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:42,975 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:42,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-09 10:50:42,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:42,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:42,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:43,097 INFO L124 PetriNetUnfolderBase]: 129/236 cut-off events. [2024-11-09 10:50:43,097 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:50:43,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 236 events. 129/236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 984 event pairs, 100 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 454. Up to 226 conditions per place. [2024-11-09 10:50:43,099 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-11-09 10:50:43,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-11-09 10:50:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-11-09 10:50:43,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-09 10:50:43,102 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 62 flow. Second operand 4 states and 56 transitions. [2024-11-09 10:50:43,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-11-09 10:50:43,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:43,104 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 85 flow [2024-11-09 10:50:43,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=85, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-11-09 10:50:43,104 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2024-11-09 10:50:43,105 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 85 flow [2024-11-09 10:50:43,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-11-09 10:50:43,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:43,105 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:50:43,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:50:43,107 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:43,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash 438621474, now seen corresponding path program 1 times [2024-11-09 10:50:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:43,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293446920] [2024-11-09 10:50:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:43,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:43,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293446920] [2024-11-09 10:50:43,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293446920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134998244] [2024-11-09 10:50:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:43,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:43,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:43,336 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) [2024-11-09 10:50:43,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:50:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:43,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:50:43,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:43,457 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 [2024-11-09 10:50:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:43,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:43,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134998244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:43,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:43,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:50:43,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649931093] [2024-11-09 10:50:43,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:43,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:50:43,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:43,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:50:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:50:43,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:43,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 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) [2024-11-09 10:50:43,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:43,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:43,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:43,988 INFO L124 PetriNetUnfolderBase]: 130/238 cut-off events. [2024-11-09 10:50:43,988 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:50:43,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 238 events. 130/238 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 986 event pairs, 100 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 461. Up to 223 conditions per place. [2024-11-09 10:50:43,991 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 19 selfloop transitions, 10 changer transitions 0/32 dead transitions. [2024-11-09 10:50:43,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 151 flow [2024-11-09 10:50:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:50:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:50:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-11-09 10:50:43,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-11-09 10:50:43,994 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 85 flow. Second operand 8 states and 87 transitions. [2024-11-09 10:50:43,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 151 flow [2024-11-09 10:50:43,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:43,996 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 110 flow [2024-11-09 10:50:43,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-09 10:50:43,998 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2024-11-09 10:50:43,998 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 110 flow [2024-11-09 10:50:43,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 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) [2024-11-09 10:50:43,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:43,999 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:50:44,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:50:44,203 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 [2024-11-09 10:50:44,204 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:44,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 713866407, now seen corresponding path program 1 times [2024-11-09 10:50:44,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:44,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391272609] [2024-11-09 10:50:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:44,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:44,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391272609] [2024-11-09 10:50:44,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391272609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:44,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:44,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:44,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13146950] [2024-11-09 10:50:44,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:44,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:44,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:44,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:44,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:44,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:44,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-09 10:50:44,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:44,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:44,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:44,312 INFO L124 PetriNetUnfolderBase]: 94/176 cut-off events. [2024-11-09 10:50:44,313 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:50:44,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 176 events. 94/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 635 event pairs, 68 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 338. Up to 161 conditions per place. [2024-11-09 10:50:44,314 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-11-09 10:50:44,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 160 flow [2024-11-09 10:50:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-11-09 10:50:44,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-09 10:50:44,318 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 110 flow. Second operand 4 states and 51 transitions. [2024-11-09 10:50:44,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 160 flow [2024-11-09 10:50:44,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 118 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-09 10:50:44,319 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 72 flow [2024-11-09 10:50:44,319 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2024-11-09 10:50:44,320 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-11-09 10:50:44,320 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 72 flow [2024-11-09 10:50:44,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-09 10:50:44,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:44,320 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:50:44,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:50:44,321 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:44,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash 713866408, now seen corresponding path program 1 times [2024-11-09 10:50:44,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:44,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485282189] [2024-11-09 10:50:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:44,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:44,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:44,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485282189] [2024-11-09 10:50:44,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485282189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:44,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:44,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:44,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769542073] [2024-11-09 10:50:44,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:44,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:44,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:44,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:44,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:44,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:44,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-11-09 10:50:44,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:44,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:44,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:44,459 INFO L124 PetriNetUnfolderBase]: 155/293 cut-off events. [2024-11-09 10:50:44,460 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:50:44,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 293 events. 155/293 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1154 event pairs, 100 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 386. Up to 195 conditions per place. [2024-11-09 10:50:44,461 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 45 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-11-09 10:50:44,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 221 flow [2024-11-09 10:50:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-11-09 10:50:44,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-11-09 10:50:44,464 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 5 states and 83 transitions. [2024-11-09 10:50:44,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 221 flow [2024-11-09 10:50:44,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:44,465 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 92 flow [2024-11-09 10:50:44,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-11-09 10:50:44,465 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-11-09 10:50:44,466 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 92 flow [2024-11-09 10:50:44,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-11-09 10:50:44,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:44,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:44,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:50:44,466 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:44,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1182568079, now seen corresponding path program 1 times [2024-11-09 10:50:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:44,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856571494] [2024-11-09 10:50:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:44,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:44,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:44,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856571494] [2024-11-09 10:50:44,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856571494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:44,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:44,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:44,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382972742] [2024-11-09 10:50:44,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:44,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:44,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:44,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:44,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2024-11-09 10:50:44,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:44,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:44,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:44,590 INFO L124 PetriNetUnfolderBase]: 131/250 cut-off events. [2024-11-09 10:50:44,591 INFO L125 PetriNetUnfolderBase]: For 70/81 co-relation queries the response was YES. [2024-11-09 10:50:44,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 250 events. 131/250 cut-off events. For 70/81 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 910 event pairs, 96 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 423. Up to 193 conditions per place. [2024-11-09 10:50:44,593 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 38 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-11-09 10:50:44,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 217 flow [2024-11-09 10:50:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-11-09 10:50:44,598 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2024-11-09 10:50:44,598 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 92 flow. Second operand 5 states and 76 transitions. [2024-11-09 10:50:44,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 217 flow [2024-11-09 10:50:44,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:44,599 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 112 flow [2024-11-09 10:50:44,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-11-09 10:50:44,600 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2024-11-09 10:50:44,600 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 112 flow [2024-11-09 10:50:44,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2024-11-09 10:50:44,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:44,600 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:44,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:50:44,600 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:44,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1683764861, now seen corresponding path program 1 times [2024-11-09 10:50:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963936074] [2024-11-09 10:50:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:44,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:44,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:44,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963936074] [2024-11-09 10:50:44,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963936074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:44,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093033102] [2024-11-09 10:50:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:44,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:44,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:44,728 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) [2024-11-09 10:50:44,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:50:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:44,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:50:44,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:44,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:44,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:50:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:44,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093033102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:44,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:44,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 10:50:44,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486950465] [2024-11-09 10:50:44,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:44,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:50:44,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:50:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:50:44,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:44,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 112 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 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) [2024-11-09 10:50:44,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:44,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:44,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:45,080 INFO L124 PetriNetUnfolderBase]: 161/309 cut-off events. [2024-11-09 10:50:45,081 INFO L125 PetriNetUnfolderBase]: For 107/122 co-relation queries the response was YES. [2024-11-09 10:50:45,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 309 events. 161/309 cut-off events. For 107/122 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1229 event pairs, 75 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 581. Up to 143 conditions per place. [2024-11-09 10:50:45,083 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 47 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-11-09 10:50:45,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 294 flow [2024-11-09 10:50:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:50:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:50:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-11-09 10:50:45,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-11-09 10:50:45,085 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 112 flow. Second operand 7 states and 111 transitions. [2024-11-09 10:50:45,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 294 flow [2024-11-09 10:50:45,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 60 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:45,087 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 151 flow [2024-11-09 10:50:45,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-11-09 10:50:45,089 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2024-11-09 10:50:45,089 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 151 flow [2024-11-09 10:50:45,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 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) [2024-11-09 10:50:45,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:45,089 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:45,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:50:45,289 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,SelfDestructingSolverStorable6 [2024-11-09 10:50:45,290 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:45,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1118057978, now seen corresponding path program 1 times [2024-11-09 10:50:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:45,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613570297] [2024-11-09 10:50:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:45,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:45,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:45,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613570297] [2024-11-09 10:50:45,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613570297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:45,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224963623] [2024-11-09 10:50:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:45,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:45,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:45,389 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) [2024-11-09 10:50:45,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:50:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:45,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:50:45,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:45,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:45,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 10:50:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:45,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224963623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:45,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:45,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-09 10:50:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374755843] [2024-11-09 10:50:45,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:45,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:50:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:50:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:50:45,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:45,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 151 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-11-09 10:50:45,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:45,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:45,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:45,703 INFO L124 PetriNetUnfolderBase]: 224/415 cut-off events. [2024-11-09 10:50:45,704 INFO L125 PetriNetUnfolderBase]: For 457/483 co-relation queries the response was YES. [2024-11-09 10:50:45,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 415 events. 224/415 cut-off events. For 457/483 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1617 event pairs, 100 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 998. Up to 206 conditions per place. [2024-11-09 10:50:45,706 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 54 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-11-09 10:50:45,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 407 flow [2024-11-09 10:50:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:50:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:50:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-11-09 10:50:45,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2024-11-09 10:50:45,708 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 151 flow. Second operand 7 states and 109 transitions. [2024-11-09 10:50:45,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 407 flow [2024-11-09 10:50:45,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 390 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:45,710 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 182 flow [2024-11-09 10:50:45,710 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=182, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-09 10:50:45,711 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2024-11-09 10:50:45,711 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 182 flow [2024-11-09 10:50:45,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-11-09 10:50:45,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:45,711 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:45,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:45,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:45,916 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:45,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash 116387642, now seen corresponding path program 1 times [2024-11-09 10:50:45,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:45,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607202991] [2024-11-09 10:50:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:45,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607202991] [2024-11-09 10:50:45,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607202991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364182659] [2024-11-09 10:50:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:45,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:45,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:45,996 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) [2024-11-09 10:50:45,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:50:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:46,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:50:46,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:46,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:46,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364182659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:46,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:46,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:50:46,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319547061] [2024-11-09 10:50:46,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:46,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:50:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:50:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:50:46,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:46,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 182 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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) [2024-11-09 10:50:46,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:46,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:46,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:46,368 INFO L124 PetriNetUnfolderBase]: 432/763 cut-off events. [2024-11-09 10:50:46,369 INFO L125 PetriNetUnfolderBase]: For 904/931 co-relation queries the response was YES. [2024-11-09 10:50:46,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 763 events. 432/763 cut-off events. For 904/931 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3240 event pairs, 226 based on Foata normal form. 16/778 useless extension candidates. Maximal degree in co-relation 1404. Up to 407 conditions per place. [2024-11-09 10:50:46,375 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 70 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-09 10:50:46,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 85 transitions, 564 flow [2024-11-09 10:50:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:50:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:50:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-11-09 10:50:46,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-11-09 10:50:46,376 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 182 flow. Second operand 8 states and 119 transitions. [2024-11-09 10:50:46,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 85 transitions, 564 flow [2024-11-09 10:50:46,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 85 transitions, 543 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:46,380 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 245 flow [2024-11-09 10:50:46,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-11-09 10:50:46,382 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2024-11-09 10:50:46,382 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 245 flow [2024-11-09 10:50:46,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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) [2024-11-09 10:50:46,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:46,383 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:46,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:50:46,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:46,584 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:46,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash -593371592, now seen corresponding path program 1 times [2024-11-09 10:50:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:46,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430295995] [2024-11-09 10:50:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:46,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430295995] [2024-11-09 10:50:46,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430295995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:46,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773137066] [2024-11-09 10:50:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:46,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:46,681 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) [2024-11-09 10:50:46,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:50:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:46,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:50:46,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:46,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:46,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773137066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:46,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:46,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:50:46,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949044762] [2024-11-09 10:50:46,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:46,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:50:46,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:50:46,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:50:46,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:46,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 245 flow. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 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) [2024-11-09 10:50:46,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:46,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:46,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:47,034 INFO L124 PetriNetUnfolderBase]: 378/660 cut-off events. [2024-11-09 10:50:47,034 INFO L125 PetriNetUnfolderBase]: For 1664/1734 co-relation queries the response was YES. [2024-11-09 10:50:47,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 660 events. 378/660 cut-off events. For 1664/1734 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2610 event pairs, 218 based on Foata normal form. 11/671 useless extension candidates. Maximal degree in co-relation 1436. Up to 403 conditions per place. [2024-11-09 10:50:47,039 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 59 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-11-09 10:50:47,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 565 flow [2024-11-09 10:50:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:50:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:50:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-11-09 10:50:47,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-09 10:50:47,040 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 245 flow. Second operand 8 states and 114 transitions. [2024-11-09 10:50:47,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 565 flow [2024-11-09 10:50:47,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 541 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:47,043 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 305 flow [2024-11-09 10:50:47,044 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-11-09 10:50:47,044 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2024-11-09 10:50:47,044 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 305 flow [2024-11-09 10:50:47,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 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) [2024-11-09 10:50:47,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:47,045 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:47,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:50:47,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 10:50:47,249 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:47,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2086425221, now seen corresponding path program 2 times [2024-11-09 10:50:47,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:47,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343401063] [2024-11-09 10:50:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:47,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:47,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:47,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343401063] [2024-11-09 10:50:47,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343401063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:47,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372289605] [2024-11-09 10:50:47,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:47,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:47,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:47,423 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) [2024-11-09 10:50:47,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:50:47,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:47,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:47,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:50:47,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:47,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:50:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:47,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:47,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372289605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:47,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:47,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-09 10:50:47,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445051395] [2024-11-09 10:50:47,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:47,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:50:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:47,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:50:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:50:48,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:48,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 305 flow. Second operand has 18 states, 18 states have (on average 8.944444444444445) internal successors, (161), 18 states have internal predecessors, (161), 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) [2024-11-09 10:50:48,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:48,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:48,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:48,836 INFO L124 PetriNetUnfolderBase]: 414/731 cut-off events. [2024-11-09 10:50:48,837 INFO L125 PetriNetUnfolderBase]: For 1885/1931 co-relation queries the response was YES. [2024-11-09 10:50:48,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 731 events. 414/731 cut-off events. For 1885/1931 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3000 event pairs, 76 based on Foata normal form. 16/746 useless extension candidates. Maximal degree in co-relation 1794. Up to 139 conditions per place. [2024-11-09 10:50:48,841 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 111 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-11-09 10:50:48,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 133 transitions, 1036 flow [2024-11-09 10:50:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:50:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:50:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 205 transitions. [2024-11-09 10:50:48,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-11-09 10:50:48,843 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 305 flow. Second operand 14 states and 205 transitions. [2024-11-09 10:50:48,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 133 transitions, 1036 flow [2024-11-09 10:50:48,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 133 transitions, 1008 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:48,847 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 357 flow [2024-11-09 10:50:48,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=357, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2024-11-09 10:50:48,848 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2024-11-09 10:50:48,848 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 357 flow [2024-11-09 10:50:48,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.944444444444445) internal successors, (161), 18 states have internal predecessors, (161), 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) [2024-11-09 10:50:48,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:48,849 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:48,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:50:49,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:49,054 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:49,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1520424275, now seen corresponding path program 1 times [2024-11-09 10:50:49,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:49,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072315479] [2024-11-09 10:50:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:49,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:49,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072315479] [2024-11-09 10:50:49,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072315479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:49,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:49,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:49,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709345307] [2024-11-09 10:50:49,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:49,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:49,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:49,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 357 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-11-09 10:50:49,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:49,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:49,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:49,136 INFO L124 PetriNetUnfolderBase]: 367/702 cut-off events. [2024-11-09 10:50:49,136 INFO L125 PetriNetUnfolderBase]: For 2860/2939 co-relation queries the response was YES. [2024-11-09 10:50:49,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3009 conditions, 702 events. 367/702 cut-off events. For 2860/2939 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2990 event pairs, 106 based on Foata normal form. 3/704 useless extension candidates. Maximal degree in co-relation 1822. Up to 482 conditions per place. [2024-11-09 10:50:49,141 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 51 selfloop transitions, 3 changer transitions 6/65 dead transitions. [2024-11-09 10:50:49,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 588 flow [2024-11-09 10:50:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-11-09 10:50:49,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-11-09 10:50:49,142 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 357 flow. Second operand 3 states and 56 transitions. [2024-11-09 10:50:49,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 588 flow [2024-11-09 10:50:49,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 511 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-11-09 10:50:49,147 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 277 flow [2024-11-09 10:50:49,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=277, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2024-11-09 10:50:49,148 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2024-11-09 10:50:49,148 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 277 flow [2024-11-09 10:50:49,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2024-11-09 10:50:49,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:49,148 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:49,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:50:49,148 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:49,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1467835709, now seen corresponding path program 2 times [2024-11-09 10:50:49,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:49,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127460810] [2024-11-09 10:50:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:49,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127460810] [2024-11-09 10:50:49,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127460810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893575496] [2024-11-09 10:50:49,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:49,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:49,325 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) [2024-11-09 10:50:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:50:49,379 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:49,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:49,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:50:49,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:49,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:50:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:49,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:49,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893575496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:49,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:49,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-09 10:50:49,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67657256] [2024-11-09 10:50:49,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:49,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:50:49,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:50:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:50:49,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:49,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 277 flow. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 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) [2024-11-09 10:50:49,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:49,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:49,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:50,663 INFO L124 PetriNetUnfolderBase]: 433/776 cut-off events. [2024-11-09 10:50:50,663 INFO L125 PetriNetUnfolderBase]: For 1980/2062 co-relation queries the response was YES. [2024-11-09 10:50:50,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3063 conditions, 776 events. 433/776 cut-off events. For 1980/2062 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3287 event pairs, 83 based on Foata normal form. 18/792 useless extension candidates. Maximal degree in co-relation 2106. Up to 150 conditions per place. [2024-11-09 10:50:50,667 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 106 selfloop transitions, 17 changer transitions 0/127 dead transitions. [2024-11-09 10:50:50,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 127 transitions, 986 flow [2024-11-09 10:50:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:50:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:50:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 191 transitions. [2024-11-09 10:50:50,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-11-09 10:50:50,669 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 277 flow. Second operand 14 states and 191 transitions. [2024-11-09 10:50:50,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 127 transitions, 986 flow [2024-11-09 10:50:50,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 127 transitions, 902 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:50,673 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 304 flow [2024-11-09 10:50:50,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=304, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2024-11-09 10:50:50,673 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2024-11-09 10:50:50,673 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 304 flow [2024-11-09 10:50:50,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 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) [2024-11-09 10:50:50,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:50,674 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:50,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:50:50,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:50,875 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:50,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1096228004, now seen corresponding path program 1 times [2024-11-09 10:50:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:50,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759032363] [2024-11-09 10:50:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:50,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:50,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759032363] [2024-11-09 10:50:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759032363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:50,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778179400] [2024-11-09 10:50:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:50,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:50,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:50,969 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) [2024-11-09 10:50:50,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:50:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:51,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:50:51,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:51,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:51,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778179400] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:51,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:50:51,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-09 10:50:51,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252743926] [2024-11-09 10:50:51,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:51,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:50:51,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:51,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2024-11-09 10:50:51,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:51,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:51,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:51,165 INFO L124 PetriNetUnfolderBase]: 398/732 cut-off events. [2024-11-09 10:50:51,165 INFO L125 PetriNetUnfolderBase]: For 2056/2064 co-relation queries the response was YES. [2024-11-09 10:50:51,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2965 conditions, 732 events. 398/732 cut-off events. For 2056/2064 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3035 event pairs, 154 based on Foata normal form. 34/748 useless extension candidates. Maximal degree in co-relation 2119. Up to 345 conditions per place. [2024-11-09 10:50:51,169 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 51 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-11-09 10:50:51,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 544 flow [2024-11-09 10:50:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-09 10:50:51,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-11-09 10:50:51,170 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 304 flow. Second operand 5 states and 65 transitions. [2024-11-09 10:50:51,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 544 flow [2024-11-09 10:50:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 452 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-11-09 10:50:51,173 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 273 flow [2024-11-09 10:50:51,173 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2024-11-09 10:50:51,173 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2024-11-09 10:50:51,173 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 273 flow [2024-11-09 10:50:51,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2024-11-09 10:50:51,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:51,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:51,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:50:51,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:50:51,374 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:51,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2049241071, now seen corresponding path program 1 times [2024-11-09 10:50:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889282692] [2024-11-09 10:50:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889282692] [2024-11-09 10:50:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889282692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500767538] [2024-11-09 10:50:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:51,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:51,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:51,442 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) [2024-11-09 10:50:51,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:50:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:51,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:50:51,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:51,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500767538] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:51,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:50:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-09 10:50:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241156421] [2024-11-09 10:50:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:51,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:50:51,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:51,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2024-11-09 10:50:51,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:51,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:51,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:51,631 INFO L124 PetriNetUnfolderBase]: 350/660 cut-off events. [2024-11-09 10:50:51,631 INFO L125 PetriNetUnfolderBase]: For 1650/1666 co-relation queries the response was YES. [2024-11-09 10:50:51,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 660 events. 350/660 cut-off events. For 1650/1666 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2851 event pairs, 145 based on Foata normal form. 31/671 useless extension candidates. Maximal degree in co-relation 1848. Up to 330 conditions per place. [2024-11-09 10:50:51,635 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 46 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-11-09 10:50:51,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 465 flow [2024-11-09 10:50:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-09 10:50:51,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-11-09 10:50:51,636 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 273 flow. Second operand 5 states and 64 transitions. [2024-11-09 10:50:51,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 465 flow [2024-11-09 10:50:51,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 444 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:51,639 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 280 flow [2024-11-09 10:50:51,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2024-11-09 10:50:51,639 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2024-11-09 10:50:51,640 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 280 flow [2024-11-09 10:50:51,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2024-11-09 10:50:51,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:51,640 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] [2024-11-09 10:50:51,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:50:51,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:50:51,844 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:51,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2032299139, now seen corresponding path program 1 times [2024-11-09 10:50:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:51,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061974119] [2024-11-09 10:50:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:51,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:52,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:52,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061974119] [2024-11-09 10:50:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061974119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:52,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998766773] [2024-11-09 10:50:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:52,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:52,051 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) [2024-11-09 10:50:52,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:50:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:52,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:50:52,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:52,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:52,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:52,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-09 10:50:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998766773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:52,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:52,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-11-09 10:50:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555124899] [2024-11-09 10:50:52,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:52,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:50:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:50:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:50:52,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:52,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 280 flow. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 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) [2024-11-09 10:50:52,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:52,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:52,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:52,465 INFO L124 PetriNetUnfolderBase]: 395/811 cut-off events. [2024-11-09 10:50:52,465 INFO L125 PetriNetUnfolderBase]: For 1979/2017 co-relation queries the response was YES. [2024-11-09 10:50:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 811 events. 395/811 cut-off events. For 1979/2017 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4038 event pairs, 56 based on Foata normal form. 16/825 useless extension candidates. Maximal degree in co-relation 2324. Up to 425 conditions per place. [2024-11-09 10:50:52,469 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 64 selfloop transitions, 31 changer transitions 16/120 dead transitions. [2024-11-09 10:50:52,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 918 flow [2024-11-09 10:50:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:50:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:50:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-11-09 10:50:52,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45179063360881544 [2024-11-09 10:50:52,473 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 280 flow. Second operand 11 states and 164 transitions. [2024-11-09 10:50:52,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 918 flow [2024-11-09 10:50:52,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 889 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:52,477 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 590 flow [2024-11-09 10:50:52,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=590, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-11-09 10:50:52,478 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2024-11-09 10:50:52,478 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 590 flow [2024-11-09 10:50:52,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 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) [2024-11-09 10:50:52,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:52,478 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] [2024-11-09 10:50:52,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:50:52,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:50:52,679 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:52,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash -728470975, now seen corresponding path program 2 times [2024-11-09 10:50:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482625520] [2024-11-09 10:50:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482625520] [2024-11-09 10:50:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482625520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658520920] [2024-11-09 10:50:52,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:52,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:52,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:52,834 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) [2024-11-09 10:50:52,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:50:52,895 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:52,895 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:52,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:50:52,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:52,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:52,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:52,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-09 10:50:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:52,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658520920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:52,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:52,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-11-09 10:50:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865257263] [2024-11-09 10:50:52,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:52,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:50:52,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:50:52,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:50:53,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:53,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 590 flow. Second operand has 13 states, 13 states have (on average 10.846153846153847) internal successors, (141), 13 states have internal predecessors, (141), 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) [2024-11-09 10:50:53,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:53,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:53,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:53,261 INFO L124 PetriNetUnfolderBase]: 401/834 cut-off events. [2024-11-09 10:50:53,262 INFO L125 PetriNetUnfolderBase]: For 2854/2899 co-relation queries the response was YES. [2024-11-09 10:50:53,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3590 conditions, 834 events. 401/834 cut-off events. For 2854/2899 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4224 event pairs, 96 based on Foata normal form. 20/852 useless extension candidates. Maximal degree in co-relation 3175. Up to 568 conditions per place. [2024-11-09 10:50:53,267 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 68 selfloop transitions, 25 changer transitions 11/113 dead transitions. [2024-11-09 10:50:53,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 1060 flow [2024-11-09 10:50:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:50:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:50:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-11-09 10:50:53,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39944903581267216 [2024-11-09 10:50:53,268 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 590 flow. Second operand 11 states and 145 transitions. [2024-11-09 10:50:53,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 1060 flow [2024-11-09 10:50:53,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 1037 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:53,276 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 760 flow [2024-11-09 10:50:53,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=760, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-11-09 10:50:53,277 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 61 predicate places. [2024-11-09 10:50:53,277 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 760 flow [2024-11-09 10:50:53,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.846153846153847) internal successors, (141), 13 states have internal predecessors, (141), 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) [2024-11-09 10:50:53,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:53,277 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] [2024-11-09 10:50:53,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:53,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:50:53,481 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:53,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1229334769, now seen corresponding path program 3 times [2024-11-09 10:50:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828785666] [2024-11-09 10:50:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:53,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828785666] [2024-11-09 10:50:53,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828785666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900304799] [2024-11-09 10:50:53,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:50:53,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:53,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:53,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:50:53,786 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:50:53,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:53,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:50:53,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:53,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:53,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:53,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-09 10:50:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900304799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:53,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:53,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-11-09 10:50:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38569398] [2024-11-09 10:50:53,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:53,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:50:53,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:50:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:50:53,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:53,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 760 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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) [2024-11-09 10:50:53,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:53,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:53,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:54,238 INFO L124 PetriNetUnfolderBase]: 433/899 cut-off events. [2024-11-09 10:50:54,239 INFO L125 PetriNetUnfolderBase]: For 4127/4175 co-relation queries the response was YES. [2024-11-09 10:50:54,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4135 conditions, 899 events. 433/899 cut-off events. For 4127/4175 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4718 event pairs, 125 based on Foata normal form. 16/914 useless extension candidates. Maximal degree in co-relation 3706. Up to 626 conditions per place. [2024-11-09 10:50:54,244 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 75 selfloop transitions, 23 changer transitions 12/119 dead transitions. [2024-11-09 10:50:54,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 1241 flow [2024-11-09 10:50:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:50:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:50:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-11-09 10:50:54,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-11-09 10:50:54,245 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 760 flow. Second operand 8 states and 116 transitions. [2024-11-09 10:50:54,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 1241 flow [2024-11-09 10:50:54,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1193 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:54,254 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 881 flow [2024-11-09 10:50:54,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=881, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2024-11-09 10:50:54,254 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-11-09 10:50:54,255 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 881 flow [2024-11-09 10:50:54,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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) [2024-11-09 10:50:54,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:54,255 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] [2024-11-09 10:50:54,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:50:54,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:50:54,459 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:54,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash 437350649, now seen corresponding path program 4 times [2024-11-09 10:50:54,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:54,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490171978] [2024-11-09 10:50:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:54,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:54,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:54,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490171978] [2024-11-09 10:50:54,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490171978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:54,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656216025] [2024-11-09 10:50:54,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:50:54,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:54,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:54,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:54,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:50:54,770 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:50:54,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:54,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:50:54,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:54,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:54,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:54,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-09 10:50:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:54,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656216025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:54,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:54,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-11-09 10:50:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745290643] [2024-11-09 10:50:54,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:54,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:50:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:50:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:50:54,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:54,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 881 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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) [2024-11-09 10:50:54,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:54,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:55,173 INFO L124 PetriNetUnfolderBase]: 461/945 cut-off events. [2024-11-09 10:50:55,173 INFO L125 PetriNetUnfolderBase]: For 5582/5638 co-relation queries the response was YES. [2024-11-09 10:50:55,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4655 conditions, 945 events. 461/945 cut-off events. For 5582/5638 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5046 event pairs, 136 based on Foata normal form. 16/961 useless extension candidates. Maximal degree in co-relation 4197. Up to 678 conditions per place. [2024-11-09 10:50:55,179 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 83 selfloop transitions, 23 changer transitions 11/126 dead transitions. [2024-11-09 10:50:55,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 126 transitions, 1416 flow [2024-11-09 10:50:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:50:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:50:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-11-09 10:50:55,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-11-09 10:50:55,180 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 881 flow. Second operand 8 states and 115 transitions. [2024-11-09 10:50:55,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 126 transitions, 1416 flow [2024-11-09 10:50:55,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 126 transitions, 1371 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:55,190 INFO L231 Difference]: Finished difference. Result has 111 places, 101 transitions, 1044 flow [2024-11-09 10:50:55,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1044, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2024-11-09 10:50:55,191 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2024-11-09 10:50:55,191 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 1044 flow [2024-11-09 10:50:55,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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) [2024-11-09 10:50:55,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:55,191 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] [2024-11-09 10:50:55,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:50:55,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:55,396 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:55,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1731508435, now seen corresponding path program 5 times [2024-11-09 10:50:55,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:55,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879173790] [2024-11-09 10:50:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:55,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:55,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879173790] [2024-11-09 10:50:55,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879173790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724126316] [2024-11-09 10:50:55,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:50:55,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:55,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:55,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:50:55,593 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:55,593 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:55,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:50:55,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:55,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:55,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:55,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-09 10:50:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:55,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724126316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:55,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:55,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-11-09 10:50:55,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395760528] [2024-11-09 10:50:55,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:55,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:50:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:50:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:50:55,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-11-09 10:50:55,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 1044 flow. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 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) [2024-11-09 10:50:55,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:55,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-11-09 10:50:55,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:55,928 INFO L124 PetriNetUnfolderBase]: 432/885 cut-off events. [2024-11-09 10:50:55,928 INFO L125 PetriNetUnfolderBase]: For 5936/5991 co-relation queries the response was YES. [2024-11-09 10:50:55,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 885 events. 432/885 cut-off events. For 5936/5991 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4633 event pairs, 82 based on Foata normal form. 16/901 useless extension candidates. Maximal degree in co-relation 4097. Up to 578 conditions per place. [2024-11-09 10:50:55,935 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 84 selfloop transitions, 30 changer transitions 17/138 dead transitions. [2024-11-09 10:50:55,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 138 transitions, 1640 flow [2024-11-09 10:50:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:50:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:50:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-11-09 10:50:55,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43097643097643096 [2024-11-09 10:50:55,937 INFO L175 Difference]: Start difference. First operand has 111 places, 101 transitions, 1044 flow. Second operand 9 states and 128 transitions. [2024-11-09 10:50:55,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 138 transitions, 1640 flow [2024-11-09 10:50:55,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 138 transitions, 1562 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:55,950 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 1114 flow [2024-11-09 10:50:55,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1114, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2024-11-09 10:50:55,950 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 82 predicate places. [2024-11-09 10:50:55,950 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 1114 flow [2024-11-09 10:50:55,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 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) [2024-11-09 10:50:55,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:55,951 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:55,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:56,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:56,156 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:56,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1656040024, now seen corresponding path program 6 times [2024-11-09 10:50:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757134201] [2024-11-09 10:50:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:50:56,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:56,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757134201] [2024-11-09 10:50:56,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757134201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:56,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954891320] [2024-11-09 10:50:56,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:50:56,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:56,223 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:56,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:50:56,283 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 10:50:56,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:56,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:50:56,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:50:56,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:50:56,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954891320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:56,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:56,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:50:56,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494457799] [2024-11-09 10:50:56,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:56,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:50:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:50:56,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:50:56,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:56,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 1114 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2024-11-09 10:50:56,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:56,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:56,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:56,597 INFO L124 PetriNetUnfolderBase]: 473/863 cut-off events. [2024-11-09 10:50:56,597 INFO L125 PetriNetUnfolderBase]: For 6133/6173 co-relation queries the response was YES. [2024-11-09 10:50:56,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4685 conditions, 863 events. 473/863 cut-off events. For 6133/6173 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4012 event pairs, 79 based on Foata normal form. 57/919 useless extension candidates. Maximal degree in co-relation 4622. Up to 316 conditions per place. [2024-11-09 10:50:56,604 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 110 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-09 10:50:56,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 136 transitions, 1661 flow [2024-11-09 10:50:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:50:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:50:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-11-09 10:50:56,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3838383838383838 [2024-11-09 10:50:56,605 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 1114 flow. Second operand 9 states and 114 transitions. [2024-11-09 10:50:56,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 136 transitions, 1661 flow [2024-11-09 10:50:56,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 136 transitions, 1496 flow, removed 45 selfloop flow, removed 13 redundant places. [2024-11-09 10:50:56,616 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 1019 flow [2024-11-09 10:50:56,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1019, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2024-11-09 10:50:56,617 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-11-09 10:50:56,617 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 1019 flow [2024-11-09 10:50:56,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 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) [2024-11-09 10:50:56,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:56,617 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:56,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:50:56,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:56,818 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:56,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:56,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2108441823, now seen corresponding path program 7 times [2024-11-09 10:50:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:56,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942968769] [2024-11-09 10:50:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:56,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:50:56,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:56,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942968769] [2024-11-09 10:50:56,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942968769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:56,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258312441] [2024-11-09 10:50:56,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:50:56,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:56,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:56,921 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:56,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:50:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:56,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:50:56,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:50:57,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:50:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258312441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:57,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:57,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-09 10:50:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015378377] [2024-11-09 10:50:57,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:57,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:50:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:50:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:50:57,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:57,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 1019 flow. Second operand has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 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) [2024-11-09 10:50:57,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:57,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:57,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:57,255 INFO L124 PetriNetUnfolderBase]: 410/741 cut-off events. [2024-11-09 10:50:57,255 INFO L125 PetriNetUnfolderBase]: For 4985/4985 co-relation queries the response was YES. [2024-11-09 10:50:57,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 741 events. 410/741 cut-off events. For 4985/4985 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3266 event pairs, 67 based on Foata normal form. 39/779 useless extension candidates. Maximal degree in co-relation 3868. Up to 258 conditions per place. [2024-11-09 10:50:57,259 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 105 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-11-09 10:50:57,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1564 flow [2024-11-09 10:50:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:50:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:50:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-11-09 10:50:57,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-11-09 10:50:57,260 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 1019 flow. Second operand 9 states and 111 transitions. [2024-11-09 10:50:57,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1564 flow [2024-11-09 10:50:57,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 1505 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-09 10:50:57,267 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 1027 flow [2024-11-09 10:50:57,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1027, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2024-11-09 10:50:57,268 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-11-09 10:50:57,268 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 1027 flow [2024-11-09 10:50:57,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 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) [2024-11-09 10:50:57,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:57,268 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:57,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 10:50:57,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 10:50:57,469 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:50:57,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1311431665, now seen corresponding path program 8 times [2024-11-09 10:50:57,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:57,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214243103] [2024-11-09 10:50:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:57,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:58,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:58,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214243103] [2024-11-09 10:50:58,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214243103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:58,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986854766] [2024-11-09 10:50:58,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:58,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:58,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:58,044 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:58,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:50:58,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:58,103 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:58,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:50:58,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:58,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:58,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:58,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:50:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986854766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:58,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:58,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 26 [2024-11-09 10:50:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972696416] [2024-11-09 10:50:58,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:58,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 10:50:58,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 10:50:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2024-11-09 10:50:58,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:50:58,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 1027 flow. Second operand has 27 states, 27 states have (on average 9.074074074074074) internal successors, (245), 27 states have internal predecessors, (245), 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) [2024-11-09 10:50:58,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:58,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:50:58,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:59,792 INFO L124 PetriNetUnfolderBase]: 661/1248 cut-off events. [2024-11-09 10:50:59,792 INFO L125 PetriNetUnfolderBase]: For 8600/8600 co-relation queries the response was YES. [2024-11-09 10:50:59,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 1248 events. 661/1248 cut-off events. For 8600/8600 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6412 event pairs, 14 based on Foata normal form. 1/1248 useless extension candidates. Maximal degree in co-relation 6431. Up to 555 conditions per place. [2024-11-09 10:50:59,801 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 125 selfloop transitions, 108 changer transitions 1/238 dead transitions. [2024-11-09 10:50:59,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 238 transitions, 2512 flow [2024-11-09 10:50:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:50:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:50:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 336 transitions. [2024-11-09 10:50:59,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3771043771043771 [2024-11-09 10:50:59,802 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 1027 flow. Second operand 27 states and 336 transitions. [2024-11-09 10:50:59,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 238 transitions, 2512 flow [2024-11-09 10:50:59,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 238 transitions, 2456 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:50:59,814 INFO L231 Difference]: Finished difference. Result has 132 places, 168 transitions, 2048 flow [2024-11-09 10:50:59,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2048, PETRI_PLACES=132, PETRI_TRANSITIONS=168} [2024-11-09 10:50:59,815 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 98 predicate places. [2024-11-09 10:50:59,815 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 168 transitions, 2048 flow [2024-11-09 10:50:59,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.074074074074074) internal successors, (245), 27 states have internal predecessors, (245), 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) [2024-11-09 10:50:59,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:59,816 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:59,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:00,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:00,017 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:00,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1773066167, now seen corresponding path program 9 times [2024-11-09 10:51:00,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:00,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615918222] [2024-11-09 10:51:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:00,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615918222] [2024-11-09 10:51:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615918222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477139980] [2024-11-09 10:51:00,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:51:00,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:00,625 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:51:00,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:51:00,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:00,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-09 10:51:00,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:00,710 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 [2024-11-09 10:51:00,787 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 [2024-11-09 10:51:01,007 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 19 treesize of output 15 [2024-11-09 10:51:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:01,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:01,828 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 [2024-11-09 10:51:01,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:01,840 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 68 treesize of output 56 [2024-11-09 10:51:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477139980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:02,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2024-11-09 10:51:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904441275] [2024-11-09 10:51:02,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:02,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 10:51:02,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 10:51:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 10:51:02,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-11-09 10:51:02,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 168 transitions, 2048 flow. Second operand has 42 states, 42 states have (on average 6.857142857142857) internal successors, (288), 42 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) [2024-11-09 10:51:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:02,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-11-09 10:51:02,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:05,443 INFO L124 PetriNetUnfolderBase]: 1829/3094 cut-off events. [2024-11-09 10:51:05,444 INFO L125 PetriNetUnfolderBase]: For 26570/26570 co-relation queries the response was YES. [2024-11-09 10:51:05,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18116 conditions, 3094 events. 1829/3094 cut-off events. For 26570/26570 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16631 event pairs, 44 based on Foata normal form. 1/3095 useless extension candidates. Maximal degree in co-relation 16665. Up to 1458 conditions per place. [2024-11-09 10:51:05,461 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 284 selfloop transitions, 299 changer transitions 2/586 dead transitions. [2024-11-09 10:51:05,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 586 transitions, 7083 flow [2024-11-09 10:51:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-09 10:51:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2024-11-09 10:51:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 736 transitions. [2024-11-09 10:51:05,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30976430976430974 [2024-11-09 10:51:05,463 INFO L175 Difference]: Start difference. First operand has 132 places, 168 transitions, 2048 flow. Second operand 72 states and 736 transitions. [2024-11-09 10:51:05,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 586 transitions, 7083 flow [2024-11-09 10:51:05,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 586 transitions, 6778 flow, removed 148 selfloop flow, removed 4 redundant places. [2024-11-09 10:51:05,512 INFO L231 Difference]: Finished difference. Result has 220 places, 405 transitions, 5969 flow [2024-11-09 10:51:05,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=5969, PETRI_PLACES=220, PETRI_TRANSITIONS=405} [2024-11-09 10:51:05,514 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 186 predicate places. [2024-11-09 10:51:05,514 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 405 transitions, 5969 flow [2024-11-09 10:51:05,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.857142857142857) internal successors, (288), 42 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) [2024-11-09 10:51:05,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:05,514 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:05,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 10:51:05,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:05,719 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:05,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:05,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1476316909, now seen corresponding path program 10 times [2024-11-09 10:51:05,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:05,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884449963] [2024-11-09 10:51:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:05,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:06,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884449963] [2024-11-09 10:51:06,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884449963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:06,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789137242] [2024-11-09 10:51:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:51:06,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:06,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:06,355 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:06,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:51:06,422 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:51:06,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:06,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 10:51:06,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:06,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:06,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:06,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789137242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:06,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:06,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 30 [2024-11-09 10:51:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093323650] [2024-11-09 10:51:06,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:06,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 10:51:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 10:51:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2024-11-09 10:51:06,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:51:06,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 405 transitions, 5969 flow. Second operand has 31 states, 31 states have (on average 9.129032258064516) internal successors, (283), 31 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:06,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:06,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:51:06,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:08,235 INFO L124 PetriNetUnfolderBase]: 1402/2623 cut-off events. [2024-11-09 10:51:08,235 INFO L125 PetriNetUnfolderBase]: For 35773/35831 co-relation queries the response was YES. [2024-11-09 10:51:08,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18847 conditions, 2623 events. 1402/2623 cut-off events. For 35773/35831 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15753 event pairs, 67 based on Foata normal form. 21/2636 useless extension candidates. Maximal degree in co-relation 17949. Up to 1609 conditions per place. [2024-11-09 10:51:08,256 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 287 selfloop transitions, 212 changer transitions 2/510 dead transitions. [2024-11-09 10:51:08,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 510 transitions, 8360 flow [2024-11-09 10:51:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 10:51:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-09 10:51:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 307 transitions. [2024-11-09 10:51:08,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37212121212121213 [2024-11-09 10:51:08,258 INFO L175 Difference]: Start difference. First operand has 220 places, 405 transitions, 5969 flow. Second operand 25 states and 307 transitions. [2024-11-09 10:51:08,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 510 transitions, 8360 flow [2024-11-09 10:51:08,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 510 transitions, 7572 flow, removed 347 selfloop flow, removed 9 redundant places. [2024-11-09 10:51:08,365 INFO L231 Difference]: Finished difference. Result has 243 places, 451 transitions, 6675 flow [2024-11-09 10:51:08,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6675, PETRI_PLACES=243, PETRI_TRANSITIONS=451} [2024-11-09 10:51:08,366 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 209 predicate places. [2024-11-09 10:51:08,367 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 451 transitions, 6675 flow [2024-11-09 10:51:08,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.129032258064516) internal successors, (283), 31 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:08,367 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:08,367 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:08,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 10:51:08,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:08,572 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:08,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1171054601, now seen corresponding path program 11 times [2024-11-09 10:51:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206778782] [2024-11-09 10:51:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:09,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:09,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206778782] [2024-11-09 10:51:09,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206778782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:09,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242601499] [2024-11-09 10:51:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:51:09,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:09,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:09,171 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:09,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 10:51:09,229 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:51:09,229 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:09,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:51:09,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:51:09,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:09,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:09,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:09,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242601499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:09,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:09,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 33 [2024-11-09 10:51:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478608647] [2024-11-09 10:51:09,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:09,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 10:51:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 10:51:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 10:51:09,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:09,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 451 transitions, 6675 flow. Second operand has 34 states, 34 states have (on average 8.205882352941176) internal successors, (279), 34 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) [2024-11-09 10:51:09,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:09,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:09,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:11,430 INFO L124 PetriNetUnfolderBase]: 2496/4234 cut-off events. [2024-11-09 10:51:11,430 INFO L125 PetriNetUnfolderBase]: For 51259/51259 co-relation queries the response was YES. [2024-11-09 10:51:11,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29610 conditions, 4234 events. 2496/4234 cut-off events. For 51259/51259 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 24763 event pairs, 149 based on Foata normal form. 1/4235 useless extension candidates. Maximal degree in co-relation 29221. Up to 2313 conditions per place. [2024-11-09 10:51:11,460 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 357 selfloop transitions, 355 changer transitions 1/714 dead transitions. [2024-11-09 10:51:11,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 714 transitions, 11802 flow [2024-11-09 10:51:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 10:51:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 10:51:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 310 transitions. [2024-11-09 10:51:11,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3613053613053613 [2024-11-09 10:51:11,463 INFO L175 Difference]: Start difference. First operand has 243 places, 451 transitions, 6675 flow. Second operand 26 states and 310 transitions. [2024-11-09 10:51:11,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 714 transitions, 11802 flow [2024-11-09 10:51:11,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 714 transitions, 11246 flow, removed 193 selfloop flow, removed 14 redundant places. [2024-11-09 10:51:11,614 INFO L231 Difference]: Finished difference. Result has 261 places, 589 transitions, 9845 flow [2024-11-09 10:51:11,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9845, PETRI_PLACES=261, PETRI_TRANSITIONS=589} [2024-11-09 10:51:11,614 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 227 predicate places. [2024-11-09 10:51:11,614 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 589 transitions, 9845 flow [2024-11-09 10:51:11,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.205882352941176) internal successors, (279), 34 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) [2024-11-09 10:51:11,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:11,615 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:11,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 10:51:11,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 10:51:11,815 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:11,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash -325460153, now seen corresponding path program 12 times [2024-11-09 10:51:11,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:11,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341196887] [2024-11-09 10:51:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:12,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:12,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341196887] [2024-11-09 10:51:12,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341196887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:12,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712896421] [2024-11-09 10:51:12,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:51:12,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:12,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:12,411 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:12,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 10:51:12,469 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 10:51:12,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:12,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 10:51:12,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:12,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:12,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:12,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712896421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:12,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 32 [2024-11-09 10:51:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524906424] [2024-11-09 10:51:12,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:12,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 10:51:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 10:51:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 10:51:13,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 589 transitions, 9845 flow. Second operand has 33 states, 33 states have (on average 8.151515151515152) internal successors, (269), 33 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:13,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:13,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:14,845 INFO L124 PetriNetUnfolderBase]: 2648/4491 cut-off events. [2024-11-09 10:51:14,845 INFO L125 PetriNetUnfolderBase]: For 63866/63866 co-relation queries the response was YES. [2024-11-09 10:51:14,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34404 conditions, 4491 events. 2648/4491 cut-off events. For 63866/63866 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26622 event pairs, 153 based on Foata normal form. 1/4492 useless extension candidates. Maximal degree in co-relation 33966. Up to 2645 conditions per place. [2024-11-09 10:51:14,879 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 407 selfloop transitions, 358 changer transitions 1/767 dead transitions. [2024-11-09 10:51:14,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 767 transitions, 14017 flow [2024-11-09 10:51:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 10:51:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-09 10:51:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 281 transitions. [2024-11-09 10:51:14,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3702239789196311 [2024-11-09 10:51:14,881 INFO L175 Difference]: Start difference. First operand has 261 places, 589 transitions, 9845 flow. Second operand 23 states and 281 transitions. [2024-11-09 10:51:14,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 767 transitions, 14017 flow [2024-11-09 10:51:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 767 transitions, 13613 flow, removed 160 selfloop flow, removed 9 redundant places. [2024-11-09 10:51:15,092 INFO L231 Difference]: Finished difference. Result has 282 places, 645 transitions, 11977 flow [2024-11-09 10:51:15,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11977, PETRI_PLACES=282, PETRI_TRANSITIONS=645} [2024-11-09 10:51:15,093 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 248 predicate places. [2024-11-09 10:51:15,093 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 645 transitions, 11977 flow [2024-11-09 10:51:15,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.151515151515152) internal successors, (269), 33 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:15,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:15,093 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:15,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:15,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 10:51:15,294 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:15,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1828038199, now seen corresponding path program 13 times [2024-11-09 10:51:15,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:15,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125460080] [2024-11-09 10:51:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:15,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:15,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:15,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125460080] [2024-11-09 10:51:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125460080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:15,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560512049] [2024-11-09 10:51:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:51:15,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:15,912 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:15,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 10:51:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:15,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:51:15,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:16,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:16,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:16,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:16,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560512049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:16,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:16,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-09 10:51:16,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830022741] [2024-11-09 10:51:16,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:16,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 10:51:16,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:16,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 10:51:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-11-09 10:51:16,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:16,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 645 transitions, 11977 flow. Second operand has 30 states, 30 states have (on average 8.066666666666666) internal successors, (242), 30 states have internal predecessors, (242), 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) [2024-11-09 10:51:16,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:16,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:16,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:18,470 INFO L124 PetriNetUnfolderBase]: 2781/4716 cut-off events. [2024-11-09 10:51:18,471 INFO L125 PetriNetUnfolderBase]: For 76308/76308 co-relation queries the response was YES. [2024-11-09 10:51:18,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38879 conditions, 4716 events. 2781/4716 cut-off events. For 76308/76308 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 28155 event pairs, 146 based on Foata normal form. 1/4717 useless extension candidates. Maximal degree in co-relation 38408. Up to 2742 conditions per place. [2024-11-09 10:51:18,510 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 411 selfloop transitions, 401 changer transitions 1/814 dead transitions. [2024-11-09 10:51:18,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 814 transitions, 15994 flow [2024-11-09 10:51:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 10:51:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-09 10:51:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 357 transitions. [2024-11-09 10:51:18,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3380681818181818 [2024-11-09 10:51:18,511 INFO L175 Difference]: Start difference. First operand has 282 places, 645 transitions, 11977 flow. Second operand 32 states and 357 transitions. [2024-11-09 10:51:18,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 814 transitions, 15994 flow [2024-11-09 10:51:18,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 814 transitions, 15625 flow, removed 113 selfloop flow, removed 11 redundant places. [2024-11-09 10:51:18,883 INFO L231 Difference]: Finished difference. Result has 307 places, 688 transitions, 14005 flow [2024-11-09 10:51:18,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11608, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14005, PETRI_PLACES=307, PETRI_TRANSITIONS=688} [2024-11-09 10:51:18,884 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 273 predicate places. [2024-11-09 10:51:18,884 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 688 transitions, 14005 flow [2024-11-09 10:51:18,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.066666666666666) internal successors, (242), 30 states have internal predecessors, (242), 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) [2024-11-09 10:51:18,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:18,885 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:18,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:19,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:51:19,085 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:19,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 683090167, now seen corresponding path program 14 times [2024-11-09 10:51:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:19,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944057173] [2024-11-09 10:51:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:19,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:19,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:19,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944057173] [2024-11-09 10:51:19,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944057173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:19,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161066013] [2024-11-09 10:51:19,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:51:19,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:19,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:19,792 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:19,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 10:51:19,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:51:19,852 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:19,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:51:19,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:19,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:20,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:20,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161066013] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:20,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:20,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-11-09 10:51:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077062802] [2024-11-09 10:51:20,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:20,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 10:51:20,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 10:51:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2024-11-09 10:51:20,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:20,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 688 transitions, 14005 flow. Second operand has 29 states, 29 states have (on average 8.137931034482758) internal successors, (236), 29 states have internal predecessors, (236), 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) [2024-11-09 10:51:20,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:20,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:20,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:22,727 INFO L124 PetriNetUnfolderBase]: 3492/5892 cut-off events. [2024-11-09 10:51:22,728 INFO L125 PetriNetUnfolderBase]: For 118928/118928 co-relation queries the response was YES. [2024-11-09 10:51:22,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52961 conditions, 5892 events. 3492/5892 cut-off events. For 118928/118928 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36454 event pairs, 135 based on Foata normal form. 1/5893 useless extension candidates. Maximal degree in co-relation 52409. Up to 4021 conditions per place. [2024-11-09 10:51:22,781 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 565 selfloop transitions, 492 changer transitions 1/1059 dead transitions. [2024-11-09 10:51:22,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1059 transitions, 23463 flow [2024-11-09 10:51:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 10:51:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-09 10:51:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 413 transitions. [2024-11-09 10:51:22,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34764309764309764 [2024-11-09 10:51:22,783 INFO L175 Difference]: Start difference. First operand has 307 places, 688 transitions, 14005 flow. Second operand 36 states and 413 transitions. [2024-11-09 10:51:22,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1059 transitions, 23463 flow [2024-11-09 10:51:23,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1059 transitions, 22819 flow, removed 164 selfloop flow, removed 24 redundant places. [2024-11-09 10:51:23,189 INFO L231 Difference]: Finished difference. Result has 329 places, 944 transitions, 21652 flow [2024-11-09 10:51:23,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=13484, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21652, PETRI_PLACES=329, PETRI_TRANSITIONS=944} [2024-11-09 10:51:23,190 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 295 predicate places. [2024-11-09 10:51:23,190 INFO L471 AbstractCegarLoop]: Abstraction has has 329 places, 944 transitions, 21652 flow [2024-11-09 10:51:23,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.137931034482758) internal successors, (236), 29 states have internal predecessors, (236), 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) [2024-11-09 10:51:23,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:23,190 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:23,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:23,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:23,391 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:23,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:23,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1109095927, now seen corresponding path program 15 times [2024-11-09 10:51:23,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:23,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632853056] [2024-11-09 10:51:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:24,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632853056] [2024-11-09 10:51:24,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632853056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045836151] [2024-11-09 10:51:24,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:51:24,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:24,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:24,027 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:24,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 10:51:24,103 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 10:51:24,103 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:24,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 10:51:24,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:24,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:24,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-09 10:51:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:24,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:24,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:24,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2024-11-09 10:51:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:24,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045836151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:24,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:24,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 39 [2024-11-09 10:51:24,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646494218] [2024-11-09 10:51:24,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:24,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 10:51:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 10:51:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 10:51:25,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-11-09 10:51:25,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 944 transitions, 21652 flow. Second operand has 40 states, 40 states have (on average 8.675) internal successors, (347), 40 states have internal predecessors, (347), 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) [2024-11-09 10:51:25,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:25,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-11-09 10:51:25,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:28,147 INFO L124 PetriNetUnfolderBase]: 3805/6614 cut-off events. [2024-11-09 10:51:28,147 INFO L125 PetriNetUnfolderBase]: For 173788/174510 co-relation queries the response was YES. [2024-11-09 10:51:28,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66143 conditions, 6614 events. 3805/6614 cut-off events. For 173788/174510 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 44381 event pairs, 134 based on Foata normal form. 532/7124 useless extension candidates. Maximal degree in co-relation 65023. Up to 3713 conditions per place. [2024-11-09 10:51:28,224 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 531 selfloop transitions, 735 changer transitions 6/1310 dead transitions. [2024-11-09 10:51:28,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1310 transitions, 31159 flow [2024-11-09 10:51:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 10:51:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-09 10:51:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 646 transitions. [2024-11-09 10:51:28,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3495670995670996 [2024-11-09 10:51:28,226 INFO L175 Difference]: Start difference. First operand has 329 places, 944 transitions, 21652 flow. Second operand 56 states and 646 transitions. [2024-11-09 10:51:28,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1310 transitions, 31159 flow [2024-11-09 10:51:29,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1310 transitions, 30140 flow, removed 452 selfloop flow, removed 13 redundant places. [2024-11-09 10:51:29,049 INFO L231 Difference]: Finished difference. Result has 388 places, 1165 transitions, 29039 flow [2024-11-09 10:51:29,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=20751, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=29039, PETRI_PLACES=388, PETRI_TRANSITIONS=1165} [2024-11-09 10:51:29,050 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 354 predicate places. [2024-11-09 10:51:29,050 INFO L471 AbstractCegarLoop]: Abstraction has has 388 places, 1165 transitions, 29039 flow [2024-11-09 10:51:29,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 8.675) internal successors, (347), 40 states have internal predecessors, (347), 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) [2024-11-09 10:51:29,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:29,051 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:29,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:29,251 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:29,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1746837431, now seen corresponding path program 16 times [2024-11-09 10:51:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371101164] [2024-11-09 10:51:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:29,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:29,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:29,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371101164] [2024-11-09 10:51:29,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371101164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:29,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864761802] [2024-11-09 10:51:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:51:29,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:29,747 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:29,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 10:51:29,808 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:51:29,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:29,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 10:51:29,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:30,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:30,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:30,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:30,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864761802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:30,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:30,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 31 [2024-11-09 10:51:30,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667422065] [2024-11-09 10:51:30,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:30,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 10:51:30,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 10:51:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:51:30,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:30,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1165 transitions, 29039 flow. Second operand has 32 states, 32 states have (on average 8.21875) internal successors, (263), 32 states have internal predecessors, (263), 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) [2024-11-09 10:51:30,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:30,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:30,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:34,112 INFO L124 PetriNetUnfolderBase]: 4817/8087 cut-off events. [2024-11-09 10:51:34,112 INFO L125 PetriNetUnfolderBase]: For 237285/237285 co-relation queries the response was YES. [2024-11-09 10:51:34,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84652 conditions, 8087 events. 4817/8087 cut-off events. For 237285/237285 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 52182 event pairs, 229 based on Foata normal form. 2/8089 useless extension candidates. Maximal degree in co-relation 84289. Up to 5274 conditions per place. [2024-11-09 10:51:34,226 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 680 selfloop transitions, 771 changer transitions 2/1454 dead transitions. [2024-11-09 10:51:34,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1454 transitions, 38301 flow [2024-11-09 10:51:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 10:51:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-09 10:51:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 380 transitions. [2024-11-09 10:51:34,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35984848484848486 [2024-11-09 10:51:34,230 INFO L175 Difference]: Start difference. First operand has 388 places, 1165 transitions, 29039 flow. Second operand 32 states and 380 transitions. [2024-11-09 10:51:34,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1454 transitions, 38301 flow [2024-11-09 10:51:35,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1454 transitions, 37509 flow, removed 298 selfloop flow, removed 27 redundant places. [2024-11-09 10:51:35,548 INFO L231 Difference]: Finished difference. Result has 402 places, 1344 transitions, 35751 flow [2024-11-09 10:51:35,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=28324, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=35751, PETRI_PLACES=402, PETRI_TRANSITIONS=1344} [2024-11-09 10:51:35,549 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 368 predicate places. [2024-11-09 10:51:35,549 INFO L471 AbstractCegarLoop]: Abstraction has has 402 places, 1344 transitions, 35751 flow [2024-11-09 10:51:35,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.21875) internal successors, (263), 32 states have internal predecessors, (263), 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) [2024-11-09 10:51:35,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:35,550 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:35,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:35,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-09 10:51:35,750 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:35,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1549383105, now seen corresponding path program 17 times [2024-11-09 10:51:35,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:35,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492697720] [2024-11-09 10:51:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492697720] [2024-11-09 10:51:36,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492697720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398209357] [2024-11-09 10:51:36,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:51:36,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:36,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:36,258 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:36,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 10:51:36,321 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-09 10:51:36,321 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:36,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 10:51:36,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:36,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:36,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:36,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:36,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398209357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:36,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 32 [2024-11-09 10:51:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405930220] [2024-11-09 10:51:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:36,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 10:51:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 10:51:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 10:51:36,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:36,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1344 transitions, 35751 flow. Second operand has 33 states, 33 states have (on average 8.181818181818182) internal successors, (270), 33 states have internal predecessors, (270), 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) [2024-11-09 10:51:36,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:36,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:36,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:40,983 INFO L124 PetriNetUnfolderBase]: 5178/8691 cut-off events. [2024-11-09 10:51:40,984 INFO L125 PetriNetUnfolderBase]: For 266919/266919 co-relation queries the response was YES. [2024-11-09 10:51:41,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96907 conditions, 8691 events. 5178/8691 cut-off events. For 266919/266919 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 57120 event pairs, 184 based on Foata normal form. 1/8692 useless extension candidates. Maximal degree in co-relation 96559. Up to 4974 conditions per place. [2024-11-09 10:51:41,110 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 800 selfloop transitions, 845 changer transitions 1/1647 dead transitions. [2024-11-09 10:51:41,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1647 transitions, 45554 flow [2024-11-09 10:51:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 10:51:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-09 10:51:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 384 transitions. [2024-11-09 10:51:41,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3422459893048128 [2024-11-09 10:51:41,112 INFO L175 Difference]: Start difference. First operand has 402 places, 1344 transitions, 35751 flow. Second operand 34 states and 384 transitions. [2024-11-09 10:51:41,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1647 transitions, 45554 flow [2024-11-09 10:51:42,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1647 transitions, 44303 flow, removed 505 selfloop flow, removed 12 redundant places. [2024-11-09 10:51:42,958 INFO L231 Difference]: Finished difference. Result has 431 places, 1510 transitions, 41951 flow [2024-11-09 10:51:42,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=34602, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=41951, PETRI_PLACES=431, PETRI_TRANSITIONS=1510} [2024-11-09 10:51:42,960 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 397 predicate places. [2024-11-09 10:51:42,960 INFO L471 AbstractCegarLoop]: Abstraction has has 431 places, 1510 transitions, 41951 flow [2024-11-09 10:51:42,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.181818181818182) internal successors, (270), 33 states have internal predecessors, (270), 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) [2024-11-09 10:51:42,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:42,960 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:42,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 10:51:43,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-09 10:51:43,161 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:43,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -514531129, now seen corresponding path program 18 times [2024-11-09 10:51:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:43,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808310552] [2024-11-09 10:51:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:43,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808310552] [2024-11-09 10:51:43,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808310552] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063120105] [2024-11-09 10:51:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:51:43,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:43,670 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:43,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 10:51:43,730 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 10:51:43,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:43,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 10:51:43,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:43,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:44,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:44,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:44,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063120105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:44,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:44,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 32 [2024-11-09 10:51:44,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178946184] [2024-11-09 10:51:44,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:44,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 10:51:44,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:44,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 10:51:44,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 10:51:44,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:44,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1510 transitions, 41951 flow. Second operand has 33 states, 33 states have (on average 8.151515151515152) internal successors, (269), 33 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:44,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:44,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:44,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:48,517 INFO L124 PetriNetUnfolderBase]: 5530/9302 cut-off events. [2024-11-09 10:51:48,517 INFO L125 PetriNetUnfolderBase]: For 315608/315608 co-relation queries the response was YES. [2024-11-09 10:51:48,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108584 conditions, 9302 events. 5530/9302 cut-off events. For 315608/315608 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 62413 event pairs, 250 based on Foata normal form. 1/9303 useless extension candidates. Maximal degree in co-relation 108216. Up to 6126 conditions per place. [2024-11-09 10:51:48,809 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 907 selfloop transitions, 803 changer transitions 1/1712 dead transitions. [2024-11-09 10:51:48,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1712 transitions, 50009 flow [2024-11-09 10:51:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:51:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:51:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 246 transitions. [2024-11-09 10:51:48,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-11-09 10:51:48,814 INFO L175 Difference]: Start difference. First operand has 431 places, 1510 transitions, 41951 flow. Second operand 20 states and 246 transitions. [2024-11-09 10:51:48,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1712 transitions, 50009 flow [2024-11-09 10:51:50,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1712 transitions, 49058 flow, removed 395 selfloop flow, removed 15 redundant places. [2024-11-09 10:51:50,671 INFO L231 Difference]: Finished difference. Result has 440 places, 1596 transitions, 46969 flow [2024-11-09 10:51:50,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=41004, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=725, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=46969, PETRI_PLACES=440, PETRI_TRANSITIONS=1596} [2024-11-09 10:51:50,673 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 406 predicate places. [2024-11-09 10:51:50,673 INFO L471 AbstractCegarLoop]: Abstraction has has 440 places, 1596 transitions, 46969 flow [2024-11-09 10:51:50,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.151515151515152) internal successors, (269), 33 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:50,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:50,674 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:50,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:50,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:50,875 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:50,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash 640485085, now seen corresponding path program 19 times [2024-11-09 10:51:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:50,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576197672] [2024-11-09 10:51:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:51,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:51,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576197672] [2024-11-09 10:51:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576197672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:51,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232384861] [2024-11-09 10:51:51,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:51:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:51,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:51,411 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:51,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 10:51:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:51,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:51:51,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:51,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:51,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:51,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:51,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232384861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:51,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:51,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-09 10:51:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390326022] [2024-11-09 10:51:51,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:51,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 10:51:51,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 10:51:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2024-11-09 10:51:51,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:51:51,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1596 transitions, 46969 flow. Second operand has 30 states, 30 states have (on average 8.033333333333333) internal successors, (241), 30 states have internal predecessors, (241), 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) [2024-11-09 10:51:51,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:51,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:51:51,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:56,704 INFO L124 PetriNetUnfolderBase]: 5778/9722 cut-off events. [2024-11-09 10:51:56,704 INFO L125 PetriNetUnfolderBase]: For 367879/367879 co-relation queries the response was YES. [2024-11-09 10:51:56,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118501 conditions, 9722 events. 5778/9722 cut-off events. For 367879/367879 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 66067 event pairs, 252 based on Foata normal form. 1/9723 useless extension candidates. Maximal degree in co-relation 117836. Up to 6469 conditions per place. [2024-11-09 10:51:56,820 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 911 selfloop transitions, 848 changer transitions 1/1761 dead transitions. [2024-11-09 10:51:56,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1761 transitions, 54395 flow [2024-11-09 10:51:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 10:51:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 10:51:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 280 transitions. [2024-11-09 10:51:56,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35353535353535354 [2024-11-09 10:51:56,822 INFO L175 Difference]: Start difference. First operand has 440 places, 1596 transitions, 46969 flow. Second operand 24 states and 280 transitions. [2024-11-09 10:51:56,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1761 transitions, 54395 flow [2024-11-09 10:51:58,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1761 transitions, 53759 flow, removed 222 selfloop flow, removed 12 redundant places. [2024-11-09 10:51:58,884 INFO L231 Difference]: Finished difference. Result has 455 places, 1649 transitions, 51171 flow [2024-11-09 10:51:58,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=46333, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=51171, PETRI_PLACES=455, PETRI_TRANSITIONS=1649} [2024-11-09 10:51:58,885 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 421 predicate places. [2024-11-09 10:51:58,885 INFO L471 AbstractCegarLoop]: Abstraction has has 455 places, 1649 transitions, 51171 flow [2024-11-09 10:51:58,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.033333333333333) internal successors, (241), 30 states have internal predecessors, (241), 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) [2024-11-09 10:51:58,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:58,886 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:58,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:59,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:59,086 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:51:59,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1583120235, now seen corresponding path program 20 times [2024-11-09 10:51:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:59,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336542513] [2024-11-09 10:51:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336542513] [2024-11-09 10:51:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336542513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481675388] [2024-11-09 10:51:59,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:51:59,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:59,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:59,534 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:59,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 10:51:59,600 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:51:59,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:59,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 10:51:59,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:59,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:59,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:59,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 10:51:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:59,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481675388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:59,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:59,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-09 10:51:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456533660] [2024-11-09 10:51:59,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:59,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 10:51:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 10:51:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2024-11-09 10:52:00,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-09 10:52:00,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1649 transitions, 51171 flow. Second operand has 30 states, 30 states have (on average 8.066666666666666) internal successors, (242), 30 states have internal predecessors, (242), 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) [2024-11-09 10:52:00,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:52:00,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-09 10:52:00,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:52:05,824 INFO L124 PetriNetUnfolderBase]: 6218/10436 cut-off events. [2024-11-09 10:52:05,824 INFO L125 PetriNetUnfolderBase]: For 433445/433445 co-relation queries the response was YES. [2024-11-09 10:52:05,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131369 conditions, 10436 events. 6218/10436 cut-off events. For 433445/433445 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 71111 event pairs, 212 based on Foata normal form. 1/10437 useless extension candidates. Maximal degree in co-relation 130634. Up to 5935 conditions per place. [2024-11-09 10:52:05,954 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 896 selfloop transitions, 1051 changer transitions 1/1949 dead transitions. [2024-11-09 10:52:05,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1949 transitions, 62005 flow [2024-11-09 10:52:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 10:52:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-09 10:52:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 386 transitions. [2024-11-09 10:52:05,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3544536271808999 [2024-11-09 10:52:05,956 INFO L175 Difference]: Start difference. First operand has 455 places, 1649 transitions, 51171 flow. Second operand 33 states and 386 transitions. [2024-11-09 10:52:05,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1949 transitions, 62005 flow [2024-11-09 10:52:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1949 transitions, 61380 flow, removed 201 selfloop flow, removed 19 redundant places. [2024-11-09 10:52:08,270 INFO L231 Difference]: Finished difference. Result has 481 places, 1802 transitions, 59633 flow [2024-11-09 10:52:08,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=50546, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=925, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=59633, PETRI_PLACES=481, PETRI_TRANSITIONS=1802} [2024-11-09 10:52:08,272 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 447 predicate places. [2024-11-09 10:52:08,272 INFO L471 AbstractCegarLoop]: Abstraction has has 481 places, 1802 transitions, 59633 flow [2024-11-09 10:52:08,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.066666666666666) internal successors, (242), 30 states have internal predecessors, (242), 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) [2024-11-09 10:52:08,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:52:08,272 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:52:08,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 10:52:08,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:08,473 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 10:52:08,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:52:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1893838021, now seen corresponding path program 21 times [2024-11-09 10:52:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:52:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457325615] [2024-11-09 10:52:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:52:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:52:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:52:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:52:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457325615] [2024-11-09 10:52:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457325615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:52:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053361187] [2024-11-09 10:52:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:52:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:52:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:52:08,971 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:52:08,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 10:52:09,038 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 10:52:09,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:52:09,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 10:52:09,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:52:09,046 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 [2024-11-09 10:52:09,128 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 [2024-11-09 10:52:09,301 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 15 treesize of output 11 [2024-11-09 10:52:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:52:09,412 INFO L311 TraceCheckSpWp]: Computing backward predicates...