./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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-prod-cons-eq.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 3dfcb4860b3021904fb2e25e7c2a428c9bcb0d82c2290cad723458395a0647ea --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:53:22,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:53:22,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:53:22,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:53:22,400 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:53:22,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:53:22,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:53:22,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:53:22,420 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:53:22,421 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:53:22,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:53:22,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:53:22,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:53:22,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:53:22,425 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:53:22,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:53:22,427 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:53:22,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:53:22,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:53:22,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:53:22,428 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:53:22,428 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:53:22,428 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:53:22,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:53:22,429 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:53:22,429 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:53:22,429 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:53:22,429 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:53:22,430 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:53:22,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:53:22,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:53:22,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:53:22,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:53:22,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:53:22,432 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:53:22,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:53:22,432 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:53:22,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:53:22,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:53:22,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:53:22,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:53:22,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:53:22,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dfcb4860b3021904fb2e25e7c2a428c9bcb0d82c2290cad723458395a0647ea [2024-11-19 09:53:22,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:53:22,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:53:22,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:53:22,653 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:53:22,653 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:53:22,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c [2024-11-19 09:53:23,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:53:23,995 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:53:23,996 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c [2024-11-19 09:53:24,003 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a4d07eb/3139babdf0b54390bdc7f46a2d14227b/FLAG083468c28 [2024-11-19 09:53:24,014 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a4d07eb/3139babdf0b54390bdc7f46a2d14227b [2024-11-19 09:53:24,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:53:24,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:53:24,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:53:24,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:53:24,022 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:53:24,023 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,023 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48847a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24, skipping insertion in model container [2024-11-19 09:53:24,024 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,043 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:53:24,193 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:53:24,199 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:53:24,200 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:53:24,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:53:24,211 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:53:24,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:53:24,257 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:53:24,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24 WrapperNode [2024-11-19 09:53:24,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:53:24,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:53:24,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:53:24,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:53:24,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,297 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,341 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 29, calls inlined = 35, statements flattened = 407 [2024-11-19 09:53:24,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:53:24,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:53:24,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:53:24,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:53:24,352 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,375 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 3, 16, 3]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 1, 4, 1]. [2024-11-19 09:53:24,375 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,405 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:53:24,407 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:53:24,407 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:53:24,407 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:53:24,408 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (1/1) ... [2024-11-19 09:53:24,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:53:24,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:24,445 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) [2024-11-19 09:53:24,447 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 [2024-11-19 09:53:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:53:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 09:53:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 09:53:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 09:53:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-19 09:53:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:53:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:53:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:53:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 09:53:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:53:24,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:53:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:53:24,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:53:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:53:24,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:53:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:53:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:53:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:53:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 09:53:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:53:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:53:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:53:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:53:24,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:53:24,495 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:53:24,611 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:53:24,612 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:53:25,141 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:53:25,142 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:53:25,524 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:53:25,525 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-19 09:53:25,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:53:25 BoogieIcfgContainer [2024-11-19 09:53:25,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:53:25,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:53:25,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:53:25,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:53:25,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:53:24" (1/3) ... [2024-11-19 09:53:25,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e805cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:53:25, skipping insertion in model container [2024-11-19 09:53:25,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:53:24" (2/3) ... [2024-11-19 09:53:25,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e805cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:53:25, skipping insertion in model container [2024-11-19 09:53:25,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:53:25" (3/3) ... [2024-11-19 09:53:25,533 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr.c [2024-11-19 09:53:25,546 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:53:25,546 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2024-11-19 09:53:25,546 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:53:25,661 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:53:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 106 transitions, 233 flow [2024-11-19 09:53:25,727 INFO L124 PetriNetUnfolderBase]: 10/103 cut-off events. [2024-11-19 09:53:25,729 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:53:25,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 10/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 320 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2024-11-19 09:53:25,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 106 transitions, 233 flow [2024-11-19 09:53:25,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 102 transitions, 222 flow [2024-11-19 09:53:25,747 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:53:25,755 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;@6d1b233b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:53:25,755 INFO L334 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2024-11-19 09:53:25,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:53:25,758 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:53:25,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:53:25,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:25,759 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:53:25,760 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:25,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:25,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1328468, now seen corresponding path program 1 times [2024-11-19 09:53:25,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:25,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411995155] [2024-11-19 09:53:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411995155] [2024-11-19 09:53:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411995155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:25,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:25,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:53:26,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366074249] [2024-11-19 09:53:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:26,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:53:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:53:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:53:26,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:26,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:26,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:26,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:26,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:27,293 INFO L124 PetriNetUnfolderBase]: 5713/11550 cut-off events. [2024-11-19 09:53:27,295 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-19 09:53:27,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19585 conditions, 11550 events. 5713/11550 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 114435 event pairs, 4115 based on Foata normal form. 1/6152 useless extension candidates. Maximal degree in co-relation 18897. Up to 7695 conditions per place. [2024-11-19 09:53:27,372 INFO L140 encePairwiseOnDemand]: 93/106 looper letters, 52 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2024-11-19 09:53:27,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 314 flow [2024-11-19 09:53:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:53:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:53:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-19 09:53:27,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-11-19 09:53:27,383 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 222 flow. Second operand 3 states and 185 transitions. [2024-11-19 09:53:27,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 314 flow [2024-11-19 09:53:27,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:53:27,391 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 198 flow [2024-11-19 09:53:27,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-11-19 09:53:27,395 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -14 predicate places. [2024-11-19 09:53:27,396 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 198 flow [2024-11-19 09:53:27,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:27,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:27,396 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:53:27,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:53:27,397 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:27,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1328469, now seen corresponding path program 1 times [2024-11-19 09:53:27,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:27,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244457894] [2024-11-19 09:53:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:27,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:27,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:27,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244457894] [2024-11-19 09:53:27,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244457894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:27,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:27,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:27,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226043013] [2024-11-19 09:53:27,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:27,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:53:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:53:27,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:53:27,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:27,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:27,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:27,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:27,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:28,603 INFO L124 PetriNetUnfolderBase]: 5714/11553 cut-off events. [2024-11-19 09:53:28,603 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-19 09:53:28,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19394 conditions, 11553 events. 5714/11553 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 114491 event pairs, 4115 based on Foata normal form. 0/6152 useless extension candidates. Maximal degree in co-relation 19341. Up to 7712 conditions per place. [2024-11-19 09:53:28,659 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 59 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-19 09:53:28,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 330 flow [2024-11-19 09:53:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:53:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:53:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2024-11-19 09:53:28,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-19 09:53:28,666 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 198 flow. Second operand 4 states and 224 transitions. [2024-11-19 09:53:28,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 330 flow [2024-11-19 09:53:28,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:28,668 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 217 flow [2024-11-19 09:53:28,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-19 09:53:28,669 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -11 predicate places. [2024-11-19 09:53:28,669 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 217 flow [2024-11-19 09:53:28,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:28,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:28,670 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:53:28,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:53:28,670 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:28,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash 41184544, now seen corresponding path program 1 times [2024-11-19 09:53:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024885373] [2024-11-19 09:53:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024885373] [2024-11-19 09:53:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024885373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:28,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:28,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:53:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482871328] [2024-11-19 09:53:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:28,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:53:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:53:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:53:28,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:28,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:28,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:28,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:28,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:29,872 INFO L124 PetriNetUnfolderBase]: 5715/11556 cut-off events. [2024-11-19 09:53:29,873 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-19 09:53:29,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 11556 events. 5715/11556 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114613 event pairs, 4115 based on Foata normal form. 0/6152 useless extension candidates. Maximal degree in co-relation 19384. Up to 7711 conditions per place. [2024-11-19 09:53:29,917 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 59 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2024-11-19 09:53:29,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 355 flow [2024-11-19 09:53:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:53:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:53:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-19 09:53:29,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-11-19 09:53:29,919 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 217 flow. Second operand 5 states and 267 transitions. [2024-11-19 09:53:29,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 355 flow [2024-11-19 09:53:29,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:29,920 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 251 flow [2024-11-19 09:53:29,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-11-19 09:53:29,921 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -6 predicate places. [2024-11-19 09:53:29,921 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 251 flow [2024-11-19 09:53:29,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:29,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:29,922 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:53:29,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:53:29,922 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:29,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1276722408, now seen corresponding path program 1 times [2024-11-19 09:53:29,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:29,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113997882] [2024-11-19 09:53:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:29,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:30,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:30,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113997882] [2024-11-19 09:53:30,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113997882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:30,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:30,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:53:30,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965431895] [2024-11-19 09:53:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:30,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:53:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:53:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:53:30,145 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:30,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:30,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:30,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:30,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:31,029 INFO L124 PetriNetUnfolderBase]: 5716/11559 cut-off events. [2024-11-19 09:53:31,029 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-19 09:53:31,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19431 conditions, 11559 events. 5716/11559 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114426 event pairs, 4115 based on Foata normal form. 0/6156 useless extension candidates. Maximal degree in co-relation 19400. Up to 7714 conditions per place. [2024-11-19 09:53:31,083 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 60 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-19 09:53:31,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 101 transitions, 395 flow [2024-11-19 09:53:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:53:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:53:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-19 09:53:31,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-11-19 09:53:31,085 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 251 flow. Second operand 5 states and 267 transitions. [2024-11-19 09:53:31,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 101 transitions, 395 flow [2024-11-19 09:53:31,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:31,088 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 293 flow [2024-11-19 09:53:31,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-11-19 09:53:31,088 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2024-11-19 09:53:31,089 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 293 flow [2024-11-19 09:53:31,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:31,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:31,089 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:53:31,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:53:31,089 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:31,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1276703282, now seen corresponding path program 1 times [2024-11-19 09:53:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:31,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507006271] [2024-11-19 09:53:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:31,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507006271] [2024-11-19 09:53:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507006271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789825950] [2024-11-19 09:53:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:31,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:31,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:31,271 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) [2024-11-19 09:53:31,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:53:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:31,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:53:31,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:31,413 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 [2024-11-19 09:53:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:31,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789825950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:31,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:31,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:53:31,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266635721] [2024-11-19 09:53:31,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:31,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:53:31,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:31,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:53:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:53:31,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:31,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 293 flow. Second operand has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:31,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:31,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:31,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:32,948 INFO L124 PetriNetUnfolderBase]: 5717/11561 cut-off events. [2024-11-19 09:53:32,948 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-19 09:53:32,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19459 conditions, 11561 events. 5717/11561 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114566 event pairs, 4115 based on Foata normal form. 0/6161 useless extension candidates. Maximal degree in co-relation 19415. Up to 7715 conditions per place. [2024-11-19 09:53:33,020 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 61 selfloop transitions, 10 changer transitions 0/103 dead transitions. [2024-11-19 09:53:33,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 103 transitions, 446 flow [2024-11-19 09:53:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:53:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:53:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 387 transitions. [2024-11-19 09:53:33,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4563679245283019 [2024-11-19 09:53:33,022 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 293 flow. Second operand 8 states and 387 transitions. [2024-11-19 09:53:33,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 103 transitions, 446 flow [2024-11-19 09:53:33,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 103 transitions, 439 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:33,024 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 317 flow [2024-11-19 09:53:33,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2024-11-19 09:53:33,025 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 3 predicate places. [2024-11-19 09:53:33,025 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 317 flow [2024-11-19 09:53:33,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:33,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:33,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:53:33,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:53:33,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:33,231 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:33,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash 923692661, now seen corresponding path program 1 times [2024-11-19 09:53:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:33,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286216509] [2024-11-19 09:53:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:33,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:33,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286216509] [2024-11-19 09:53:33,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286216509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:33,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:33,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:53:33,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728514094] [2024-11-19 09:53:33,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:33,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:53:33,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:53:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:53:33,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-19 09:53:33,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:33,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:33,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-19 09:53:33,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:34,410 INFO L124 PetriNetUnfolderBase]: 7474/15889 cut-off events. [2024-11-19 09:53:34,410 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-19 09:53:34,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26461 conditions, 15889 events. 7474/15889 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 169725 event pairs, 5726 based on Foata normal form. 236/8651 useless extension candidates. Maximal degree in co-relation 26410. Up to 7714 conditions per place. [2024-11-19 09:53:34,488 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 102 selfloop transitions, 8 changer transitions 0/145 dead transitions. [2024-11-19 09:53:34,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 145 transitions, 641 flow [2024-11-19 09:53:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:53:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:53:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 321 transitions. [2024-11-19 09:53:34,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6056603773584905 [2024-11-19 09:53:34,493 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 317 flow. Second operand 5 states and 321 transitions. [2024-11-19 09:53:34,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 145 transitions, 641 flow [2024-11-19 09:53:34,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 594 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-19 09:53:34,496 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 315 flow [2024-11-19 09:53:34,496 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2024-11-19 09:53:34,497 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 1 predicate places. [2024-11-19 09:53:34,497 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 315 flow [2024-11-19 09:53:34,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:34,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:34,497 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:53:34,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:53:34,497 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:34,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 923685254, now seen corresponding path program 1 times [2024-11-19 09:53:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:34,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089638508] [2024-11-19 09:53:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:34,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089638508] [2024-11-19 09:53:34,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089638508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020402773] [2024-11-19 09:53:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:34,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:34,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:34,663 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) [2024-11-19 09:53:34,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:53:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:34,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:53:34,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:34,766 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 [2024-11-19 09:53:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:34,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:34,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020402773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:34,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:34,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:53:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411970522] [2024-11-19 09:53:34,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:34,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:53:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:53:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:53:35,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:35,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 106 transitions, 315 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:35,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:35,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:35,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:36,456 INFO L124 PetriNetUnfolderBase]: 7771/15393 cut-off events. [2024-11-19 09:53:36,456 INFO L125 PetriNetUnfolderBase]: For 439/439 co-relation queries the response was YES. [2024-11-19 09:53:36,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26718 conditions, 15393 events. 7771/15393 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 156341 event pairs, 5906 based on Foata normal form. 0/8150 useless extension candidates. Maximal degree in co-relation 26642. Up to 10678 conditions per place. [2024-11-19 09:53:36,525 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 58 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-11-19 09:53:36,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 457 flow [2024-11-19 09:53:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:53:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:53:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2024-11-19 09:53:36,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46495956873315364 [2024-11-19 09:53:36,526 INFO L175 Difference]: Start difference. First operand has 103 places, 106 transitions, 315 flow. Second operand 7 states and 345 transitions. [2024-11-19 09:53:36,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 457 flow [2024-11-19 09:53:36,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 105 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:36,528 INFO L231 Difference]: Finished difference. Result has 107 places, 105 transitions, 337 flow [2024-11-19 09:53:36,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=107, PETRI_TRANSITIONS=105} [2024-11-19 09:53:36,529 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 5 predicate places. [2024-11-19 09:53:36,529 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 105 transitions, 337 flow [2024-11-19 09:53:36,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:36,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:36,532 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-19 09:53:36,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:53:36,735 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 [2024-11-19 09:53:36,736 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:36,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1430368089, now seen corresponding path program 1 times [2024-11-19 09:53:36,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:36,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289042340] [2024-11-19 09:53:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:36,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:36,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:36,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289042340] [2024-11-19 09:53:36,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289042340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:36,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607322513] [2024-11-19 09:53:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:36,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:36,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:36,910 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) [2024-11-19 09:53:36,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:53:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:36,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:53:37,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:37,015 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 [2024-11-19 09:53:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:37,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:37,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607322513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:37,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:37,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:53:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954866907] [2024-11-19 09:53:37,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:37,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:53:37,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:53:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:53:37,625 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:37,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 105 transitions, 337 flow. Second operand has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:37,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:37,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:37,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:39,064 INFO L124 PetriNetUnfolderBase]: 7694/15552 cut-off events. [2024-11-19 09:53:39,064 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2024-11-19 09:53:39,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26805 conditions, 15552 events. 7694/15552 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 161748 event pairs, 5827 based on Foata normal form. 0/8161 useless extension candidates. Maximal degree in co-relation 26706. Up to 10578 conditions per place. [2024-11-19 09:53:39,145 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 52 selfloop transitions, 24 changer transitions 0/108 dead transitions. [2024-11-19 09:53:39,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 108 transitions, 507 flow [2024-11-19 09:53:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:53:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:53:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 431 transitions. [2024-11-19 09:53:39,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45178197064989517 [2024-11-19 09:53:39,147 INFO L175 Difference]: Start difference. First operand has 107 places, 105 transitions, 337 flow. Second operand 9 states and 431 transitions. [2024-11-19 09:53:39,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 108 transitions, 507 flow [2024-11-19 09:53:39,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 108 transitions, 480 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-19 09:53:39,152 INFO L231 Difference]: Finished difference. Result has 109 places, 108 transitions, 376 flow [2024-11-19 09:53:39,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=376, PETRI_PLACES=109, PETRI_TRANSITIONS=108} [2024-11-19 09:53:39,153 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-11-19 09:53:39,154 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 108 transitions, 376 flow [2024-11-19 09:53:39,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:39,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:39,155 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:39,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:53:39,355 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 [2024-11-19 09:53:39,356 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:39,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1396649637, now seen corresponding path program 1 times [2024-11-19 09:53:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515590278] [2024-11-19 09:53:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:39,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:39,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515590278] [2024-11-19 09:53:39,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515590278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:39,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824917373] [2024-11-19 09:53:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:39,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:39,540 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) [2024-11-19 09:53:39,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:53:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:39,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:53:39,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:39,687 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 [2024-11-19 09:53:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:39,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:39,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824917373] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:39,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:53:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 15 [2024-11-19 09:53:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096763615] [2024-11-19 09:53:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:39,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:53:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:53:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:53:39,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-19 09:53:39,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 108 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:39,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:39,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-19 09:53:39,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:41,001 INFO L124 PetriNetUnfolderBase]: 7477/15896 cut-off events. [2024-11-19 09:53:41,001 INFO L125 PetriNetUnfolderBase]: For 439/439 co-relation queries the response was YES. [2024-11-19 09:53:41,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26887 conditions, 15896 events. 7477/15896 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 169750 event pairs, 5726 based on Foata normal form. 0/8421 useless extension candidates. Maximal degree in co-relation 26771. Up to 7710 conditions per place. [2024-11-19 09:53:41,057 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 109 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-11-19 09:53:41,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 152 transitions, 740 flow [2024-11-19 09:53:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:53:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:53:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2024-11-19 09:53:41,058 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-19 09:53:41,058 INFO L175 Difference]: Start difference. First operand has 109 places, 108 transitions, 376 flow. Second operand 6 states and 360 transitions. [2024-11-19 09:53:41,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 152 transitions, 740 flow [2024-11-19 09:53:41,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 152 transitions, 674 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-19 09:53:41,061 INFO L231 Difference]: Finished difference. Result has 109 places, 110 transitions, 363 flow [2024-11-19 09:53:41,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=109, PETRI_TRANSITIONS=110} [2024-11-19 09:53:41,061 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-11-19 09:53:41,062 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 110 transitions, 363 flow [2024-11-19 09:53:41,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:41,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:41,062 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:41,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:53:41,262 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 [2024-11-19 09:53:41,262 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:41,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1389533996, now seen corresponding path program 1 times [2024-11-19 09:53:41,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:41,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120281976] [2024-11-19 09:53:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:41,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:41,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120281976] [2024-11-19 09:53:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120281976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:41,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098233339] [2024-11-19 09:53:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:41,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:53:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:53:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:53:41,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 106 [2024-11-19 09:53:41,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 110 transitions, 363 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:41,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:41,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 106 [2024-11-19 09:53:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:42,157 INFO L124 PetriNetUnfolderBase]: 7703/14868 cut-off events. [2024-11-19 09:53:42,157 INFO L125 PetriNetUnfolderBase]: For 429/429 co-relation queries the response was YES. [2024-11-19 09:53:42,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26105 conditions, 14868 events. 7703/14868 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 146142 event pairs, 5942 based on Foata normal form. 0/8349 useless extension candidates. Maximal degree in co-relation 19214. Up to 10594 conditions per place. [2024-11-19 09:53:42,221 INFO L140 encePairwiseOnDemand]: 102/106 looper letters, 74 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-11-19 09:53:42,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 511 flow [2024-11-19 09:53:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:53:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:53:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-19 09:53:42,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2024-11-19 09:53:42,222 INFO L175 Difference]: Start difference. First operand has 109 places, 110 transitions, 363 flow. Second operand 3 states and 182 transitions. [2024-11-19 09:53:42,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 107 transitions, 511 flow [2024-11-19 09:53:42,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 499 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:53:42,224 INFO L231 Difference]: Finished difference. Result has 105 places, 107 transitions, 351 flow [2024-11-19 09:53:42,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=105, PETRI_TRANSITIONS=107} [2024-11-19 09:53:42,225 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 3 predicate places. [2024-11-19 09:53:42,225 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 107 transitions, 351 flow [2024-11-19 09:53:42,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:42,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:42,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:42,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:53:42,229 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:42,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:42,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1389533995, now seen corresponding path program 1 times [2024-11-19 09:53:42,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:42,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979454476] [2024-11-19 09:53:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:42,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:42,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:42,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979454476] [2024-11-19 09:53:42,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979454476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:42,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:42,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:53:42,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640541781] [2024-11-19 09:53:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:42,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:53:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:53:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:53:42,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:42,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 107 transitions, 351 flow. Second operand has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:42,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:42,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:42,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:43,428 INFO L124 PetriNetUnfolderBase]: 7707/14882 cut-off events. [2024-11-19 09:53:43,428 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2024-11-19 09:53:43,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26131 conditions, 14882 events. 7707/14882 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 146361 event pairs, 5942 based on Foata normal form. 0/8354 useless extension candidates. Maximal degree in co-relation 19230. Up to 10635 conditions per place. [2024-11-19 09:53:43,494 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 76 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-11-19 09:53:43,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 531 flow [2024-11-19 09:53:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:53:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:53:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 304 transitions. [2024-11-19 09:53:43,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-11-19 09:53:43,496 INFO L175 Difference]: Start difference. First operand has 105 places, 107 transitions, 351 flow. Second operand 6 states and 304 transitions. [2024-11-19 09:53:43,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 531 flow [2024-11-19 09:53:43,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:43,498 INFO L231 Difference]: Finished difference. Result has 112 places, 111 transitions, 391 flow [2024-11-19 09:53:43,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=112, PETRI_TRANSITIONS=111} [2024-11-19 09:53:43,499 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 10 predicate places. [2024-11-19 09:53:43,499 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 111 transitions, 391 flow [2024-11-19 09:53:43,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:43,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:43,499 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:43,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:53:43,499 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:43,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1389534102, now seen corresponding path program 1 times [2024-11-19 09:53:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:43,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108148280] [2024-11-19 09:53:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:43,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:43,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108148280] [2024-11-19 09:53:43,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108148280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:43,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:43,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:53:43,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148758788] [2024-11-19 09:53:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:43,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:53:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:53:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:53:43,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:43,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 111 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:43,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:43,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:43,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:44,552 INFO L124 PetriNetUnfolderBase]: 6893/13466 cut-off events. [2024-11-19 09:53:44,552 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-11-19 09:53:44,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23612 conditions, 13466 events. 6893/13466 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 132458 event pairs, 5220 based on Foata normal form. 0/7365 useless extension candidates. Maximal degree in co-relation 23525. Up to 9510 conditions per place. [2024-11-19 09:53:44,604 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 75 selfloop transitions, 10 changer transitions 0/115 dead transitions. [2024-11-19 09:53:44,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 115 transitions, 575 flow [2024-11-19 09:53:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:53:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:53:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-11-19 09:53:44,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962264150943396 [2024-11-19 09:53:44,605 INFO L175 Difference]: Start difference. First operand has 112 places, 111 transitions, 391 flow. Second operand 5 states and 263 transitions. [2024-11-19 09:53:44,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 115 transitions, 575 flow [2024-11-19 09:53:44,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 115 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:44,607 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 440 flow [2024-11-19 09:53:44,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2024-11-19 09:53:44,608 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 14 predicate places. [2024-11-19 09:53:44,608 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 440 flow [2024-11-19 09:53:44,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:44,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:44,609 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:44,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:53:44,610 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:44,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1396649638, now seen corresponding path program 1 times [2024-11-19 09:53:44,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:44,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040781035] [2024-11-19 09:53:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:44,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:53:44,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:44,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040781035] [2024-11-19 09:53:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040781035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:44,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:44,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:44,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559339738] [2024-11-19 09:53:44,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:44,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:53:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:53:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:53:44,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-19 09:53:44,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2024-11-19 09:53:44,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:44,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-19 09:53:44,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:45,442 INFO L124 PetriNetUnfolderBase]: 6893/13464 cut-off events. [2024-11-19 09:53:45,442 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2024-11-19 09:53:45,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23654 conditions, 13464 events. 6893/13464 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 132318 event pairs, 5220 based on Foata normal form. 2/7372 useless extension candidates. Maximal degree in co-relation 23541. Up to 9507 conditions per place. [2024-11-19 09:53:45,512 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 75 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2024-11-19 09:53:45,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 606 flow [2024-11-19 09:53:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:53:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:53:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-19 09:53:45,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-11-19 09:53:45,513 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 440 flow. Second operand 3 states and 185 transitions. [2024-11-19 09:53:45,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 606 flow [2024-11-19 09:53:45,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 114 transitions, 598 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:45,515 INFO L231 Difference]: Finished difference. Result has 115 places, 114 transitions, 448 flow [2024-11-19 09:53:45,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=448, PETRI_PLACES=115, PETRI_TRANSITIONS=114} [2024-11-19 09:53:45,516 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 13 predicate places. [2024-11-19 09:53:45,516 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 114 transitions, 448 flow [2024-11-19 09:53:45,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2024-11-19 09:53:45,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:45,516 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:45,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:53:45,516 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:45,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 393970111, now seen corresponding path program 1 times [2024-11-19 09:53:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771012101] [2024-11-19 09:53:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:45,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771012101] [2024-11-19 09:53:45,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771012101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:53:45,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:53:45,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:53:45,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048728867] [2024-11-19 09:53:45,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:53:45,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:53:45,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:45,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:53:45,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:53:45,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-19 09:53:45,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 114 transitions, 448 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:45,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:45,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-19 09:53:45,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:46,465 INFO L124 PetriNetUnfolderBase]: 7233/14148 cut-off events. [2024-11-19 09:53:46,466 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2024-11-19 09:53:46,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25124 conditions, 14148 events. 7233/14148 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 138552 event pairs, 5536 based on Foata normal form. 98/7999 useless extension candidates. Maximal degree in co-relation 24921. Up to 9514 conditions per place. [2024-11-19 09:53:46,539 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 138 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2024-11-19 09:53:46,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 171 transitions, 1009 flow [2024-11-19 09:53:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:53:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:53:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-11-19 09:53:46,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6462264150943396 [2024-11-19 09:53:46,540 INFO L175 Difference]: Start difference. First operand has 115 places, 114 transitions, 448 flow. Second operand 4 states and 274 transitions. [2024-11-19 09:53:46,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 171 transitions, 1009 flow [2024-11-19 09:53:46,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 973 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:46,544 INFO L231 Difference]: Finished difference. Result has 117 places, 114 transitions, 449 flow [2024-11-19 09:53:46,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=449, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2024-11-19 09:53:46,544 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 15 predicate places. [2024-11-19 09:53:46,544 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 449 flow [2024-11-19 09:53:46,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:46,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:46,545 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:46,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:53:46,545 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:46,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash 392602139, now seen corresponding path program 1 times [2024-11-19 09:53:46,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:46,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999090387] [2024-11-19 09:53:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:46,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:46,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:46,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999090387] [2024-11-19 09:53:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999090387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:46,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572520875] [2024-11-19 09:53:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:46,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:46,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:46,700 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) [2024-11-19 09:53:46,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:53:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:46,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:53:46,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:46,823 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 [2024-11-19 09:53:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:46,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:47,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572520875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:47,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:47,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:53:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676928645] [2024-11-19 09:53:47,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:47,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:53:47,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:53:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:53:47,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:53:47,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 449 flow. Second operand has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:47,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:47,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:53:47,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:48,578 INFO L124 PetriNetUnfolderBase]: 7217/14300 cut-off events. [2024-11-19 09:53:48,578 INFO L125 PetriNetUnfolderBase]: For 1138/1138 co-relation queries the response was YES. [2024-11-19 09:53:48,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27674 conditions, 14300 events. 7217/14300 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 141858 event pairs, 5520 based on Foata normal form. 0/8466 useless extension candidates. Maximal degree in co-relation 27478. Up to 10060 conditions per place. [2024-11-19 09:53:48,655 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 64 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-11-19 09:53:48,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 113 transitions, 613 flow [2024-11-19 09:53:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:53:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:53:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 342 transitions. [2024-11-19 09:53:48,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-11-19 09:53:48,656 INFO L175 Difference]: Start difference. First operand has 117 places, 114 transitions, 449 flow. Second operand 7 states and 342 transitions. [2024-11-19 09:53:48,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 113 transitions, 613 flow [2024-11-19 09:53:48,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 113 transitions, 608 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:53:48,659 INFO L231 Difference]: Finished difference. Result has 120 places, 113 transitions, 480 flow [2024-11-19 09:53:48,659 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=120, PETRI_TRANSITIONS=113} [2024-11-19 09:53:48,659 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 18 predicate places. [2024-11-19 09:53:48,659 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 480 flow [2024-11-19 09:53:48,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:48,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:48,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:48,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:53:48,860 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,SelfDestructingSolverStorable14 [2024-11-19 09:53:48,861 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:48,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2144507305, now seen corresponding path program 1 times [2024-11-19 09:53:48,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:48,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733492422] [2024-11-19 09:53:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733492422] [2024-11-19 09:53:48,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733492422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:48,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92005037] [2024-11-19 09:53:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:48,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:48,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:48,949 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) [2024-11-19 09:53:48,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:53:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:49,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:53:49,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:49,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92005037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:49,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-19 09:53:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234451365] [2024-11-19 09:53:49,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:49,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:53:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:53:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:53:49,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-19 09:53:49,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 113 transitions, 480 flow. Second operand has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:49,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:49,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-19 09:53:49,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:50,862 INFO L124 PetriNetUnfolderBase]: 12474/24915 cut-off events. [2024-11-19 09:53:50,862 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-11-19 09:53:50,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47921 conditions, 24915 events. 12474/24915 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 1690. Compared 267107 event pairs, 9330 based on Foata normal form. 2/14746 useless extension candidates. Maximal degree in co-relation 47579. Up to 10063 conditions per place. [2024-11-19 09:53:51,009 INFO L140 encePairwiseOnDemand]: 92/106 looper letters, 117 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2024-11-19 09:53:51,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 1094 flow [2024-11-19 09:53:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:53:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:53:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 602 transitions. [2024-11-19 09:53:51,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.516295025728988 [2024-11-19 09:53:51,011 INFO L175 Difference]: Start difference. First operand has 120 places, 113 transitions, 480 flow. Second operand 11 states and 602 transitions. [2024-11-19 09:53:51,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 1094 flow [2024-11-19 09:53:51,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 184 transitions, 1024 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-19 09:53:51,016 INFO L231 Difference]: Finished difference. Result has 130 places, 135 transitions, 733 flow [2024-11-19 09:53:51,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=733, PETRI_PLACES=130, PETRI_TRANSITIONS=135} [2024-11-19 09:53:51,016 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 28 predicate places. [2024-11-19 09:53:51,016 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 135 transitions, 733 flow [2024-11-19 09:53:51,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:51,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:51,017 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:51,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:53:51,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 09:53:51,218 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:51,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -711127660, now seen corresponding path program 1 times [2024-11-19 09:53:51,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:51,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951869165] [2024-11-19 09:53:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:51,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:51,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951869165] [2024-11-19 09:53:51,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951869165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:51,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701032506] [2024-11-19 09:53:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:53:51,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:51,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:51,497 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) [2024-11-19 09:53:51,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:53:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:53:51,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:53:51,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:51,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:53:51,620 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 [2024-11-19 09:53:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:53:51,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:53:51,671 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:53:51,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:53:51,760 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:53:51,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:53:51,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2024-11-19 09:53:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:51,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:51,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:53:51,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:53:52,081 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:53:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:52,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701032506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:52,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:52,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-19 09:53:52,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120530786] [2024-11-19 09:53:52,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:52,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:53:52,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:53:52,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:53:53,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-19 09:53:53,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 135 transitions, 733 flow. Second operand has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:53,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:53,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-19 09:53:53,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:55,241 INFO L124 PetriNetUnfolderBase]: 14076/26805 cut-off events. [2024-11-19 09:53:55,241 INFO L125 PetriNetUnfolderBase]: For 2226/2226 co-relation queries the response was YES. [2024-11-19 09:53:55,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52591 conditions, 26805 events. 14076/26805 cut-off events. For 2226/2226 co-relation queries the response was YES. Maximal size of possible extension queue 1871. Compared 277164 event pairs, 10644 based on Foata normal form. 0/16140 useless extension candidates. Maximal degree in co-relation 52490. Up to 19376 conditions per place. [2024-11-19 09:53:55,450 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 100 selfloop transitions, 15 changer transitions 0/142 dead transitions. [2024-11-19 09:53:55,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 142 transitions, 1015 flow [2024-11-19 09:53:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:53:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:53:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 351 transitions. [2024-11-19 09:53:55,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41391509433962265 [2024-11-19 09:53:55,451 INFO L175 Difference]: Start difference. First operand has 130 places, 135 transitions, 733 flow. Second operand 8 states and 351 transitions. [2024-11-19 09:53:55,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 142 transitions, 1015 flow [2024-11-19 09:53:55,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 142 transitions, 1006 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-19 09:53:55,458 INFO L231 Difference]: Finished difference. Result has 135 places, 134 transitions, 750 flow [2024-11-19 09:53:55,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=750, PETRI_PLACES=135, PETRI_TRANSITIONS=134} [2024-11-19 09:53:55,458 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 33 predicate places. [2024-11-19 09:53:55,458 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 134 transitions, 750 flow [2024-11-19 09:53:55,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:55,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:55,459 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:55,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:53:55,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:55,660 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:53:55,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:53:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1043142031, now seen corresponding path program 2 times [2024-11-19 09:53:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:53:55,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997804696] [2024-11-19 09:53:55,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:53:55,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:53:55,683 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:53:55,683 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:55,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:53:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997804696] [2024-11-19 09:53:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997804696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:53:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408968344] [2024-11-19 09:53:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:53:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:53:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:53:55,843 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) [2024-11-19 09:53:55,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:53:55,946 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:53:55,946 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:53:55,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 09:53:55,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:53:56,033 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 [2024-11-19 09:53:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:56,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:53:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:53:56,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408968344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:53:56,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:53:56,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-19 09:53:56,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893854607] [2024-11-19 09:53:56,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:53:56,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:53:56,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:53:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:53:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:53:56,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-19 09:53:56,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 134 transitions, 750 flow. Second operand has 21 states, 21 states have (on average 44.714285714285715) internal successors, (939), 21 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:56,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:53:56,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-19 09:53:56,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:53:59,728 INFO L124 PetriNetUnfolderBase]: 17737/35534 cut-off events. [2024-11-19 09:53:59,729 INFO L125 PetriNetUnfolderBase]: For 3060/3060 co-relation queries the response was YES. [2024-11-19 09:53:59,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68346 conditions, 35534 events. 17737/35534 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 394102 event pairs, 13140 based on Foata normal form. 0/21026 useless extension candidates. Maximal degree in co-relation 68140. Up to 10071 conditions per place. [2024-11-19 09:53:59,927 INFO L140 encePairwiseOnDemand]: 96/106 looper letters, 185 selfloop transitions, 43 changer transitions 0/255 dead transitions. [2024-11-19 09:53:59,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 255 transitions, 1767 flow [2024-11-19 09:53:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 09:53:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-19 09:53:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1080 transitions. [2024-11-19 09:53:59,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-11-19 09:53:59,930 INFO L175 Difference]: Start difference. First operand has 135 places, 134 transitions, 750 flow. Second operand 21 states and 1080 transitions. [2024-11-19 09:53:59,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 255 transitions, 1767 flow [2024-11-19 09:53:59,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 255 transitions, 1644 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-19 09:53:59,938 INFO L231 Difference]: Finished difference. Result has 150 places, 149 transitions, 929 flow [2024-11-19 09:53:59,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=929, PETRI_PLACES=150, PETRI_TRANSITIONS=149} [2024-11-19 09:53:59,938 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 48 predicate places. [2024-11-19 09:53:59,939 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 149 transitions, 929 flow [2024-11-19 09:53:59,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 44.714285714285715) internal successors, (939), 21 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:53:59,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:53:59,939 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:53:59,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:54:00,143 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,SelfDestructingSolverStorable17 [2024-11-19 09:54:00,143 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:00,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -159313345, now seen corresponding path program 1 times [2024-11-19 09:54:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:00,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140255656] [2024-11-19 09:54:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140255656] [2024-11-19 09:54:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140255656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:00,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734853663] [2024-11-19 09:54:00,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:00,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:00,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-19 09:54:00,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 149 transitions, 929 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:00,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:00,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-19 09:54:00,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:02,825 INFO L124 PetriNetUnfolderBase]: 18921/36625 cut-off events. [2024-11-19 09:54:02,825 INFO L125 PetriNetUnfolderBase]: For 3558/3558 co-relation queries the response was YES. [2024-11-19 09:54:02,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72133 conditions, 36625 events. 18921/36625 cut-off events. For 3558/3558 co-relation queries the response was YES. Maximal size of possible extension queue 2425. Compared 394118 event pairs, 13980 based on Foata normal form. 309/22608 useless extension candidates. Maximal degree in co-relation 71723. Up to 25064 conditions per place. [2024-11-19 09:54:03,018 INFO L140 encePairwiseOnDemand]: 89/106 looper letters, 162 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-11-19 09:54:03,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 206 transitions, 1624 flow [2024-11-19 09:54:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:54:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:54:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 321 transitions. [2024-11-19 09:54:03,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6056603773584905 [2024-11-19 09:54:03,020 INFO L175 Difference]: Start difference. First operand has 150 places, 149 transitions, 929 flow. Second operand 5 states and 321 transitions. [2024-11-19 09:54:03,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 206 transitions, 1624 flow [2024-11-19 09:54:03,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 206 transitions, 1450 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-11-19 09:54:03,027 INFO L231 Difference]: Finished difference. Result has 147 places, 155 transitions, 929 flow [2024-11-19 09:54:03,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=929, PETRI_PLACES=147, PETRI_TRANSITIONS=155} [2024-11-19 09:54:03,027 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 45 predicate places. [2024-11-19 09:54:03,027 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 155 transitions, 929 flow [2024-11-19 09:54:03,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:03,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:03,028 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:03,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:54:03,028 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:03,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash -35952352, now seen corresponding path program 1 times [2024-11-19 09:54:03,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:03,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356675998] [2024-11-19 09:54:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:03,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356675998] [2024-11-19 09:54:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356675998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:03,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:03,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238022884] [2024-11-19 09:54:03,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:03,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:03,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:03,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:54:03,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 155 transitions, 929 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:03,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:03,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:54:03,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:05,325 INFO L124 PetriNetUnfolderBase]: 15178/29363 cut-off events. [2024-11-19 09:54:05,326 INFO L125 PetriNetUnfolderBase]: For 5323/5449 co-relation queries the response was YES. [2024-11-19 09:54:05,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65248 conditions, 29363 events. 15178/29363 cut-off events. For 5323/5449 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 307289 event pairs, 11362 based on Foata normal form. 0/18887 useless extension candidates. Maximal degree in co-relation 64919. Up to 21246 conditions per place. [2024-11-19 09:54:05,525 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 103 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2024-11-19 09:54:05,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 153 transitions, 1171 flow [2024-11-19 09:54:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:54:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:54:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2024-11-19 09:54:05,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-11-19 09:54:05,526 INFO L175 Difference]: Start difference. First operand has 147 places, 155 transitions, 929 flow. Second operand 5 states and 255 transitions. [2024-11-19 09:54:05,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 153 transitions, 1171 flow [2024-11-19 09:54:05,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 153 transitions, 1164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:54:05,539 INFO L231 Difference]: Finished difference. Result has 148 places, 153 transitions, 958 flow [2024-11-19 09:54:05,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=958, PETRI_PLACES=148, PETRI_TRANSITIONS=153} [2024-11-19 09:54:05,540 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 46 predicate places. [2024-11-19 09:54:05,540 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 153 transitions, 958 flow [2024-11-19 09:54:05,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:05,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:05,540 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:05,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:54:05,540 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:05,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:05,541 INFO L85 PathProgramCache]: Analyzing trace with hash -35952351, now seen corresponding path program 1 times [2024-11-19 09:54:05,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:05,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371966780] [2024-11-19 09:54:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:05,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:05,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371966780] [2024-11-19 09:54:05,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371966780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:05,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:05,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:54:05,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671397011] [2024-11-19 09:54:05,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:05,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:54:05,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:54:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:54:05,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-19 09:54:05,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 153 transitions, 958 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-19 09:54:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:08,152 INFO L124 PetriNetUnfolderBase]: 11763/23043 cut-off events. [2024-11-19 09:54:08,153 INFO L125 PetriNetUnfolderBase]: For 4778/4886 co-relation queries the response was YES. [2024-11-19 09:54:08,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50554 conditions, 23043 events. 11763/23043 cut-off events. For 4778/4886 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 234695 event pairs, 8918 based on Foata normal form. 0/15649 useless extension candidates. Maximal degree in co-relation 50225. Up to 16846 conditions per place. [2024-11-19 09:54:08,333 INFO L140 encePairwiseOnDemand]: 102/106 looper letters, 108 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-11-19 09:54:08,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 151 transitions, 1196 flow [2024-11-19 09:54:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 213 transitions. [2024-11-19 09:54:08,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-11-19 09:54:08,335 INFO L175 Difference]: Start difference. First operand has 148 places, 153 transitions, 958 flow. Second operand 4 states and 213 transitions. [2024-11-19 09:54:08,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 151 transitions, 1196 flow [2024-11-19 09:54:08,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 151 transitions, 1150 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:54:08,348 INFO L231 Difference]: Finished difference. Result has 145 places, 151 transitions, 934 flow [2024-11-19 09:54:08,348 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=934, PETRI_PLACES=145, PETRI_TRANSITIONS=151} [2024-11-19 09:54:08,349 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 43 predicate places. [2024-11-19 09:54:08,349 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 151 transitions, 934 flow [2024-11-19 09:54:08,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:08,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:08,349 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:08,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 09:54:08,350 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:08,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash -35952350, now seen corresponding path program 1 times [2024-11-19 09:54:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:08,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589816628] [2024-11-19 09:54:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:08,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589816628] [2024-11-19 09:54:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589816628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:08,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:08,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:54:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163644459] [2024-11-19 09:54:08,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:08,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:54:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:54:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:54:08,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-19 09:54:08,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 151 transitions, 934 flow. Second operand has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:08,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:08,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-19 09:54:08,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:10,269 INFO L124 PetriNetUnfolderBase]: 11525/21599 cut-off events. [2024-11-19 09:54:10,269 INFO L125 PetriNetUnfolderBase]: For 4677/4677 co-relation queries the response was YES. [2024-11-19 09:54:10,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47601 conditions, 21599 events. 11525/21599 cut-off events. For 4677/4677 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 209662 event pairs, 9041 based on Foata normal form. 0/15915 useless extension candidates. Maximal degree in co-relation 47272. Up to 16510 conditions per place. [2024-11-19 09:54:10,406 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 98 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-11-19 09:54:10,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 147 transitions, 1170 flow [2024-11-19 09:54:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:54:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:54:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-19 09:54:10,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-11-19 09:54:10,408 INFO L175 Difference]: Start difference. First operand has 145 places, 151 transitions, 934 flow. Second operand 5 states and 235 transitions. [2024-11-19 09:54:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 147 transitions, 1170 flow [2024-11-19 09:54:10,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 147 transitions, 1150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:10,420 INFO L231 Difference]: Finished difference. Result has 143 places, 147 transitions, 954 flow [2024-11-19 09:54:10,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=954, PETRI_PLACES=143, PETRI_TRANSITIONS=147} [2024-11-19 09:54:10,421 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 41 predicate places. [2024-11-19 09:54:10,421 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 147 transitions, 954 flow [2024-11-19 09:54:10,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:10,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:10,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:10,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-19 09:54:10,421 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:10,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:10,421 INFO L85 PathProgramCache]: Analyzing trace with hash -35952349, now seen corresponding path program 1 times [2024-11-19 09:54:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:10,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287601588] [2024-11-19 09:54:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:10,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287601588] [2024-11-19 09:54:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287601588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284236340] [2024-11-19 09:54:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:10,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:10,771 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) [2024-11-19 09:54:10,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:54:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:10,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 09:54:10,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:10,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:54:10,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:54:10,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:54:10,930 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:54:10,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:54:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:54:10,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:54:10,966 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:54:10,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:54:10,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:54:10,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:54:11,001 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:54:11,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:54:11,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:54:11,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:54:11,024 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:54:11,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:54:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:11,046 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:54:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284236340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:11,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:54:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-11-19 09:54:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091267875] [2024-11-19 09:54:11,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:11,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:54:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:54:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:54:11,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-19 09:54:11,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 147 transitions, 954 flow. Second operand has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:11,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:11,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-19 09:54:11,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:12,444 INFO L124 PetriNetUnfolderBase]: 10099/19151 cut-off events. [2024-11-19 09:54:12,445 INFO L125 PetriNetUnfolderBase]: For 4678/4678 co-relation queries the response was YES. [2024-11-19 09:54:12,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41333 conditions, 19151 events. 10099/19151 cut-off events. For 4678/4678 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 184578 event pairs, 8120 based on Foata normal form. 0/14739 useless extension candidates. Maximal degree in co-relation 41004. Up to 14889 conditions per place. [2024-11-19 09:54:12,580 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 119 selfloop transitions, 4 changer transitions 0/146 dead transitions. [2024-11-19 09:54:12,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 146 transitions, 1194 flow [2024-11-19 09:54:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-11-19 09:54:12,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-11-19 09:54:12,582 INFO L175 Difference]: Start difference. First operand has 143 places, 147 transitions, 954 flow. Second operand 4 states and 195 transitions. [2024-11-19 09:54:12,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 146 transitions, 1194 flow [2024-11-19 09:54:12,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 146 transitions, 1142 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:54:12,594 INFO L231 Difference]: Finished difference. Result has 141 places, 146 transitions, 904 flow [2024-11-19 09:54:12,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=904, PETRI_PLACES=141, PETRI_TRANSITIONS=146} [2024-11-19 09:54:12,595 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 39 predicate places. [2024-11-19 09:54:12,595 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 146 transitions, 904 flow [2024-11-19 09:54:12,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:12,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:12,596 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:12,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:54:12,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:12,796 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:12,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 75167751, now seen corresponding path program 1 times [2024-11-19 09:54:12,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:12,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760673802] [2024-11-19 09:54:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:12,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760673802] [2024-11-19 09:54:12,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760673802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:12,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:12,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:54:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717132759] [2024-11-19 09:54:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:12,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:54:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:54:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:54:12,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-19 09:54:12,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 146 transitions, 904 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:12,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:12,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-19 09:54:12,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:14,174 INFO L124 PetriNetUnfolderBase]: 10687/17171 cut-off events. [2024-11-19 09:54:14,175 INFO L125 PetriNetUnfolderBase]: For 4127/4143 co-relation queries the response was YES. [2024-11-19 09:54:14,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39713 conditions, 17171 events. 10687/17171 cut-off events. For 4127/4143 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 129835 event pairs, 3073 based on Foata normal form. 179/12937 useless extension candidates. Maximal degree in co-relation 39384. Up to 12055 conditions per place. [2024-11-19 09:54:14,305 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 140 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-11-19 09:54:14,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 166 transitions, 1241 flow [2024-11-19 09:54:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:54:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:54:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2024-11-19 09:54:14,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6446540880503144 [2024-11-19 09:54:14,306 INFO L175 Difference]: Start difference. First operand has 141 places, 146 transitions, 904 flow. Second operand 3 states and 205 transitions. [2024-11-19 09:54:14,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 166 transitions, 1241 flow [2024-11-19 09:54:14,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 166 transitions, 1236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:14,312 INFO L231 Difference]: Finished difference. Result has 142 places, 147 transitions, 921 flow [2024-11-19 09:54:14,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=921, PETRI_PLACES=142, PETRI_TRANSITIONS=147} [2024-11-19 09:54:14,313 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 40 predicate places. [2024-11-19 09:54:14,313 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 147 transitions, 921 flow [2024-11-19 09:54:14,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:14,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:14,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:14,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-19 09:54:14,314 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:14,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1319090559, now seen corresponding path program 1 times [2024-11-19 09:54:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:14,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413410460] [2024-11-19 09:54:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:14,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:14,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413410460] [2024-11-19 09:54:14,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413410460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:14,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:14,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:54:14,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483322306] [2024-11-19 09:54:14,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:14,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:14,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:14,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-19 09:54:14,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 147 transitions, 921 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:14,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:14,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-19 09:54:14,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:15,586 INFO L124 PetriNetUnfolderBase]: 9210/17767 cut-off events. [2024-11-19 09:54:15,586 INFO L125 PetriNetUnfolderBase]: For 7071/7179 co-relation queries the response was YES. [2024-11-19 09:54:15,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40731 conditions, 17767 events. 9210/17767 cut-off events. For 7071/7179 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 169059 event pairs, 7661 based on Foata normal form. 306/14469 useless extension candidates. Maximal degree in co-relation 40401. Up to 12191 conditions per place. [2024-11-19 09:54:15,716 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 141 selfloop transitions, 12 changer transitions 0/177 dead transitions. [2024-11-19 09:54:15,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 177 transitions, 1370 flow [2024-11-19 09:54:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2024-11-19 09:54:15,717 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6014150943396226 [2024-11-19 09:54:15,717 INFO L175 Difference]: Start difference. First operand has 142 places, 147 transitions, 921 flow. Second operand 4 states and 255 transitions. [2024-11-19 09:54:15,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 177 transitions, 1370 flow [2024-11-19 09:54:15,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 177 transitions, 1355 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 09:54:15,726 INFO L231 Difference]: Finished difference. Result has 145 places, 147 transitions, 944 flow [2024-11-19 09:54:15,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=944, PETRI_PLACES=145, PETRI_TRANSITIONS=147} [2024-11-19 09:54:15,727 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 43 predicate places. [2024-11-19 09:54:15,727 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 147 transitions, 944 flow [2024-11-19 09:54:15,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:15,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:15,727 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:15,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-19 09:54:15,727 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:15,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1849112724, now seen corresponding path program 1 times [2024-11-19 09:54:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509875059] [2024-11-19 09:54:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:15,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509875059] [2024-11-19 09:54:15,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509875059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:15,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947346525] [2024-11-19 09:54:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:15,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:15,830 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) [2024-11-19 09:54:15,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:54:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:15,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:54:15,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:15,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:15,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947346525] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:15,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:54:15,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2024-11-19 09:54:15,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262181212] [2024-11-19 09:54:15,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:15,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:15,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:54:15,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-19 09:54:15,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 147 transitions, 944 flow. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:15,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:15,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-19 09:54:15,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:17,335 INFO L124 PetriNetUnfolderBase]: 8658/19301 cut-off events. [2024-11-19 09:54:17,335 INFO L125 PetriNetUnfolderBase]: For 6149/6149 co-relation queries the response was YES. [2024-11-19 09:54:17,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41161 conditions, 19301 events. 8658/19301 cut-off events. For 6149/6149 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 203911 event pairs, 7157 based on Foata normal form. 12/14869 useless extension candidates. Maximal degree in co-relation 37495. Up to 12370 conditions per place. [2024-11-19 09:54:17,477 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 142 selfloop transitions, 24 changer transitions 0/190 dead transitions. [2024-11-19 09:54:17,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 190 transitions, 1479 flow [2024-11-19 09:54:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:54:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:54:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 305 transitions. [2024-11-19 09:54:17,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5754716981132075 [2024-11-19 09:54:17,478 INFO L175 Difference]: Start difference. First operand has 145 places, 147 transitions, 944 flow. Second operand 5 states and 305 transitions. [2024-11-19 09:54:17,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 190 transitions, 1479 flow [2024-11-19 09:54:17,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 190 transitions, 1447 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:54:17,487 INFO L231 Difference]: Finished difference. Result has 147 places, 145 transitions, 962 flow [2024-11-19 09:54:17,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=962, PETRI_PLACES=147, PETRI_TRANSITIONS=145} [2024-11-19 09:54:17,488 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 45 predicate places. [2024-11-19 09:54:17,488 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 145 transitions, 962 flow [2024-11-19 09:54:17,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:17,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:17,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:17,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:54:17,688 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,SelfDestructingSolverStorable25 [2024-11-19 09:54:17,688 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-19 09:54:17,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash -531208680, now seen corresponding path program 1 times [2024-11-19 09:54:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:17,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929793338] [2024-11-19 09:54:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:17,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:17,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929793338] [2024-11-19 09:54:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929793338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78821176] [2024-11-19 09:54:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:17,970 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) [2024-11-19 09:54:17,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:54:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:18,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-19 09:54:18,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:18,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:54:18,130 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:54:18,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:54:18,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:54:18,157 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:54:18,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:54:18,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:54:18,179 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:54:18,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:54:18,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:54:18,200 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:54:18,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-19 09:54:18,218 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:54:18,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:54:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:54:18,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:54:18,250 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:54:18,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:54:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:18,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:19,036 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 1330 treesize of output 1312 [2024-11-19 09:54:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:20,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78821176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:20,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:20,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2024-11-19 09:54:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907184541] [2024-11-19 09:54:20,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:20,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 09:54:20,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 09:54:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-19 09:54:22,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 106 [2024-11-19 09:54:22,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 145 transitions, 962 flow. Second operand has 22 states, 22 states have (on average 32.45454545454545) internal successors, (714), 22 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:22,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:22,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 106 [2024-11-19 09:54:22,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:25,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 09:54:32,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 09:54:40,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-19 09:54:44,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 09:54:48,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 09:54:53,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]