./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-dot-product.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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:17:33,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:17:33,837 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:17:33,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:17:33,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:17:33,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:17:33,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:17:33,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:17:33,874 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:17:33,875 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:17:33,875 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:17:33,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:17:33,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:17:33,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:17:33,879 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:17:33,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:17:33,880 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:17:33,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:17:33,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:17:33,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:17:33,881 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:17:33,882 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:17:33,882 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:17:33,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:17:33,883 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:17:33,883 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:17:33,884 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:17:33,884 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:17:33,884 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:17:33,885 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:17:33,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:17:33,888 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:17:33,889 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:17:33,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:33,889 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:17:33,889 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:17:33,890 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:17:33,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:17:33,890 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:17:33,890 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:17:33,890 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:17:33,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:17:33,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-10 18:17:34,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:17:34,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:17:34,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:17:34,230 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:17:34,231 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:17:34,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-10 18:17:35,673 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:17:35,861 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:17:35,862 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-10 18:17:35,871 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/983fd18ef/90bbeae59913438b92cd9a27d3d8e72c/FLAG70ef1067a [2024-11-10 18:17:35,885 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/983fd18ef/90bbeae59913438b92cd9a27d3d8e72c [2024-11-10 18:17:35,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:17:35,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:17:35,891 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:35,891 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:17:35,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:17:35,897 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:35" (1/1) ... [2024-11-10 18:17:35,898 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f8212a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:35, skipping insertion in model container [2024-11-10 18:17:35,899 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:35" (1/1) ... [2024-11-10 18:17:35,927 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:17:36,142 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:17:36,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:36,160 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:17:36,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:36,205 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:17:36,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36 WrapperNode [2024-11-10 18:17:36,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:36,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:36,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:17:36,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:17:36,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,275 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 266 [2024-11-10 18:17:36,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:36,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:17:36,276 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:17:36,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:17:36,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,290 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,307 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 18:17:36,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,321 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,328 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:17:36,337 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:17:36,337 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:17:36,337 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:17:36,338 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (1/1) ... [2024-11-10 18:17:36,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:36,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:36,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:17:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:17:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:17:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:17:36,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:17:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:17:36,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:17:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:17:36,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:17:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:17:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:17:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:17:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:17:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:17:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:17:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:17:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:17:36,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:17:36,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:17:36,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:17:36,428 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:17:36,548 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:17:36,550 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:17:37,090 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:17:37,090 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:17:37,418 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:17:37,419 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:17:37,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:37 BoogieIcfgContainer [2024-11-10 18:17:37,420 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:17:37,422 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:17:37,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:17:37,427 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:17:37,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:17:35" (1/3) ... [2024-11-10 18:17:37,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef20815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:37, skipping insertion in model container [2024-11-10 18:17:37,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:36" (2/3) ... [2024-11-10 18:17:37,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef20815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:37, skipping insertion in model container [2024-11-10 18:17:37,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:37" (3/3) ... [2024-11-10 18:17:37,433 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-10 18:17:37,454 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:17:37,455 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-10 18:17:37,455 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:17:37,547 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:17:37,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 97 transitions, 215 flow [2024-11-10 18:17:37,664 INFO L124 PetriNetUnfolderBase]: 16/94 cut-off events. [2024-11-10 18:17:37,665 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:17:37,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 16/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 267 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-10 18:17:37,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 97 transitions, 215 flow [2024-11-10 18:17:37,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 93 transitions, 204 flow [2024-11-10 18:17:37,691 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:17:37,704 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;@92b0469, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:17:37,704 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-10 18:17:37,709 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:17:37,709 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:17:37,709 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:17:37,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:37,710 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:37,710 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:37,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:37,715 INFO L85 PathProgramCache]: Analyzing trace with hash 24665019, now seen corresponding path program 1 times [2024-11-10 18:17:37,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:37,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917336059] [2024-11-10 18:17:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:37,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:38,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:38,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917336059] [2024-11-10 18:17:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917336059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:38,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:38,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:17:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824674272] [2024-11-10 18:17:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:38,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:38,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:38,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 97 [2024-11-10 18:17:38,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:38,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:38,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 97 [2024-11-10 18:17:38,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:39,142 INFO L124 PetriNetUnfolderBase]: 4704/7157 cut-off events. [2024-11-10 18:17:39,143 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2024-11-10 18:17:39,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13874 conditions, 7157 events. 4704/7157 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45396 event pairs, 3616 based on Foata normal form. 1089/5989 useless extension candidates. Maximal degree in co-relation 13189. Up to 6434 conditions per place. [2024-11-10 18:17:39,214 INFO L140 encePairwiseOnDemand]: 84/97 looper letters, 45 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-11-10 18:17:39,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 274 flow [2024-11-10 18:17:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2024-11-10 18:17:39,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5910652920962199 [2024-11-10 18:17:39,229 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 204 flow. Second operand 3 states and 172 transitions. [2024-11-10 18:17:39,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 274 flow [2024-11-10 18:17:39,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 262 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:17:39,240 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 172 flow [2024-11-10 18:17:39,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-11-10 18:17:39,249 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2024-11-10 18:17:39,250 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 172 flow [2024-11-10 18:17:39,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:39,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:39,250 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:39,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:17:39,251 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:39,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 24665020, now seen corresponding path program 1 times [2024-11-10 18:17:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:39,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095449111] [2024-11-10 18:17:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:39,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:39,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095449111] [2024-11-10 18:17:39,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095449111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:39,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:39,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:39,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594688772] [2024-11-10 18:17:39,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:39,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:39,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 97 [2024-11-10 18:17:39,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:39,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:39,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 97 [2024-11-10 18:17:39,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:40,487 INFO L124 PetriNetUnfolderBase]: 4704/7156 cut-off events. [2024-11-10 18:17:40,487 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-10 18:17:40,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13692 conditions, 7156 events. 4704/7156 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45342 event pairs, 3616 based on Foata normal form. 0/4898 useless extension candidates. Maximal degree in co-relation 13667. Up to 6438 conditions per place. [2024-11-10 18:17:40,541 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 44 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2024-11-10 18:17:40,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 266 flow [2024-11-10 18:17:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2024-11-10 18:17:40,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5180412371134021 [2024-11-10 18:17:40,544 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 172 flow. Second operand 4 states and 201 transitions. [2024-11-10 18:17:40,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 266 flow [2024-11-10 18:17:40,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:40,546 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 174 flow [2024-11-10 18:17:40,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-11-10 18:17:40,547 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2024-11-10 18:17:40,547 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 174 flow [2024-11-10 18:17:40,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:40,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:40,548 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:40,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:17:40,548 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:40,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash 355797258, now seen corresponding path program 1 times [2024-11-10 18:17:40,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:40,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790587415] [2024-11-10 18:17:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:40,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:40,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:40,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790587415] [2024-11-10 18:17:40,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790587415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:40,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:40,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:40,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117079377] [2024-11-10 18:17:40,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:40,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:40,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:40,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:40,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 97 [2024-11-10 18:17:40,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:40,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:40,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 97 [2024-11-10 18:17:40,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:41,678 INFO L124 PetriNetUnfolderBase]: 4706/7166 cut-off events. [2024-11-10 18:17:41,679 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-10 18:17:41,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13713 conditions, 7166 events. 4706/7166 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45420 event pairs, 3616 based on Foata normal form. 0/4908 useless extension candidates. Maximal degree in co-relation 13685. Up to 6441 conditions per place. [2024-11-10 18:17:41,738 INFO L140 encePairwiseOnDemand]: 89/97 looper letters, 47 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-11-10 18:17:41,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 300 flow [2024-11-10 18:17:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 245 transitions. [2024-11-10 18:17:41,741 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5051546391752577 [2024-11-10 18:17:41,741 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 174 flow. Second operand 5 states and 245 transitions. [2024-11-10 18:17:41,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 300 flow [2024-11-10 18:17:41,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:41,747 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 219 flow [2024-11-10 18:17:41,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2024-11-10 18:17:41,748 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2024-11-10 18:17:41,748 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 219 flow [2024-11-10 18:17:41,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:41,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:41,750 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:41,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 18:17:41,750 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:41,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash -422417547, now seen corresponding path program 1 times [2024-11-10 18:17:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:41,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075094158] [2024-11-10 18:17:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:41,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:42,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:42,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075094158] [2024-11-10 18:17:42,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075094158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:42,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91716267] [2024-11-10 18:17:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:42,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:42,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:42,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:17:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:42,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:17:42,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:42,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:17:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:42,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:42,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91716267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:42,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:42,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:17:42,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981377596] [2024-11-10 18:17:42,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:42,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:17:42,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:42,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:17:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:17:43,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2024-11-10 18:17:43,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 219 flow. Second operand has 13 states, 13 states have (on average 37.46153846153846) internal successors, (487), 13 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2024-11-10 18:17:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:44,119 INFO L124 PetriNetUnfolderBase]: 4708/7175 cut-off events. [2024-11-10 18:17:44,119 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-10 18:17:44,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13755 conditions, 7175 events. 4708/7175 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45322 event pairs, 3616 based on Foata normal form. 0/4918 useless extension candidates. Maximal degree in co-relation 13683. Up to 6435 conditions per place. [2024-11-10 18:17:44,164 INFO L140 encePairwiseOnDemand]: 89/97 looper letters, 47 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-11-10 18:17:44,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 379 flow [2024-11-10 18:17:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:17:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:17:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 391 transitions. [2024-11-10 18:17:44,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44788087056128295 [2024-11-10 18:17:44,167 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 219 flow. Second operand 9 states and 391 transitions. [2024-11-10 18:17:44,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 379 flow [2024-11-10 18:17:44,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 378 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:44,170 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 276 flow [2024-11-10 18:17:44,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=276, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2024-11-10 18:17:44,171 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 2 predicate places. [2024-11-10 18:17:44,172 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 276 flow [2024-11-10 18:17:44,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.46153846153846) internal successors, (487), 13 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:44,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:44,172 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:44,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:17:44,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:44,374 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:44,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1020255146, now seen corresponding path program 1 times [2024-11-10 18:17:44,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:44,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083946836] [2024-11-10 18:17:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083946836] [2024-11-10 18:17:44,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083946836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:44,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:44,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115835485] [2024-11-10 18:17:44,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:44,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:44,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:44,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 97 [2024-11-10 18:17:44,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:44,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:44,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 97 [2024-11-10 18:17:44,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:45,128 INFO L124 PetriNetUnfolderBase]: 4708/7187 cut-off events. [2024-11-10 18:17:45,128 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-11-10 18:17:45,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13808 conditions, 7187 events. 4708/7187 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45483 event pairs, 3616 based on Foata normal form. 3/4933 useless extension candidates. Maximal degree in co-relation 13687. Up to 6454 conditions per place. [2024-11-10 18:17:45,176 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 58 selfloop transitions, 2 changer transitions 9/99 dead transitions. [2024-11-10 18:17:45,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 99 transitions, 458 flow [2024-11-10 18:17:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2024-11-10 18:17:45,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5092783505154639 [2024-11-10 18:17:45,180 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 276 flow. Second operand 5 states and 247 transitions. [2024-11-10 18:17:45,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 99 transitions, 458 flow [2024-11-10 18:17:45,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 99 transitions, 397 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-10 18:17:45,185 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 240 flow [2024-11-10 18:17:45,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-11-10 18:17:45,186 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 2 predicate places. [2024-11-10 18:17:45,186 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 240 flow [2024-11-10 18:17:45,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:45,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:45,187 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:45,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:17:45,191 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:45,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1483622268, now seen corresponding path program 1 times [2024-11-10 18:17:45,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:45,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193159050] [2024-11-10 18:17:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:45,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:45,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:45,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193159050] [2024-11-10 18:17:45,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193159050] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:45,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:45,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:45,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863043696] [2024-11-10 18:17:45,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:45,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:45,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:45,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 97 [2024-11-10 18:17:45,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:45,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:45,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 97 [2024-11-10 18:17:45,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:46,176 INFO L124 PetriNetUnfolderBase]: 6299/8992 cut-off events. [2024-11-10 18:17:46,176 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-11-10 18:17:46,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17781 conditions, 8992 events. 6299/8992 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 50053 event pairs, 4968 based on Foata normal form. 0/6777 useless extension candidates. Maximal degree in co-relation 17762. Up to 8629 conditions per place. [2024-11-10 18:17:46,250 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 55 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2024-11-10 18:17:46,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 84 transitions, 350 flow [2024-11-10 18:17:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 201 transitions. [2024-11-10 18:17:46,252 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4144329896907217 [2024-11-10 18:17:46,252 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 240 flow. Second operand 5 states and 201 transitions. [2024-11-10 18:17:46,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 84 transitions, 350 flow [2024-11-10 18:17:46,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 337 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:46,257 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 227 flow [2024-11-10 18:17:46,258 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-11-10 18:17:46,259 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2024-11-10 18:17:46,260 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 227 flow [2024-11-10 18:17:46,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:46,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:46,261 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:46,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:17:46,262 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:46,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1483622269, now seen corresponding path program 1 times [2024-11-10 18:17:46,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:46,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054689476] [2024-11-10 18:17:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:46,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:46,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054689476] [2024-11-10 18:17:46,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054689476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:46,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528953567] [2024-11-10 18:17:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:46,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:46,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:46,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:46,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:17:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:46,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:17:46,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:46,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:17:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:17:46,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:17:46,729 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:17:46,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:17:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:46,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:46,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:17:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528953567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:47,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:47,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-10 18:17:47,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395116518] [2024-11-10 18:17:47,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:47,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:17:47,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:47,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:17:47,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:17:47,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 97 [2024-11-10 18:17:47,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 227 flow. Second operand has 11 states, 11 states have (on average 36.63636363636363) internal successors, (403), 11 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:47,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:47,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 97 [2024-11-10 18:17:47,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:49,206 INFO L124 PetriNetUnfolderBase]: 9881/14308 cut-off events. [2024-11-10 18:17:49,206 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-10 18:17:49,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27975 conditions, 14308 events. 9881/14308 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 86333 event pairs, 3005 based on Foata normal form. 0/10459 useless extension candidates. Maximal degree in co-relation 27936. Up to 5486 conditions per place. [2024-11-10 18:17:49,301 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 107 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2024-11-10 18:17:49,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 143 transitions, 589 flow [2024-11-10 18:17:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:17:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:17:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 432 transitions. [2024-11-10 18:17:49,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4948453608247423 [2024-11-10 18:17:49,304 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 227 flow. Second operand 9 states and 432 transitions. [2024-11-10 18:17:49,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 143 transitions, 589 flow [2024-11-10 18:17:49,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 580 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:49,307 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 265 flow [2024-11-10 18:17:49,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=265, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-10 18:17:49,310 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 1 predicate places. [2024-11-10 18:17:49,310 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 265 flow [2024-11-10 18:17:49,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 36.63636363636363) internal successors, (403), 11 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:49,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:49,312 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:49,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:17:49,516 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 [2024-11-10 18:17:49,517 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:49,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash -678302187, now seen corresponding path program 1 times [2024-11-10 18:17:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:49,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419028674] [2024-11-10 18:17:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:49,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:49,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419028674] [2024-11-10 18:17:49,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419028674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:49,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231245839] [2024-11-10 18:17:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:49,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:49,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:49,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:49,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:17:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:49,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:17:49,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:49,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:49,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231245839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:49,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:49,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:17:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794163323] [2024-11-10 18:17:49,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:49,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:17:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:17:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:17:49,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2024-11-10 18:17:49,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 265 flow. Second operand has 14 states, 14 states have (on average 38.0) internal successors, (532), 14 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:49,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:49,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2024-11-10 18:17:49,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:51,475 INFO L124 PetriNetUnfolderBase]: 13530/20487 cut-off events. [2024-11-10 18:17:51,475 INFO L125 PetriNetUnfolderBase]: For 4455/4481 co-relation queries the response was YES. [2024-11-10 18:17:51,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42869 conditions, 20487 events. 13530/20487 cut-off events. For 4455/4481 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 141909 event pairs, 8408 based on Foata normal form. 0/14857 useless extension candidates. Maximal degree in co-relation 31763. Up to 12675 conditions per place. [2024-11-10 18:17:51,627 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 146 selfloop transitions, 20 changer transitions 0/187 dead transitions. [2024-11-10 18:17:51,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 187 transitions, 909 flow [2024-11-10 18:17:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:17:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:17:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 503 transitions. [2024-11-10 18:17:51,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185567010309279 [2024-11-10 18:17:51,630 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 265 flow. Second operand 10 states and 503 transitions. [2024-11-10 18:17:51,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 187 transitions, 909 flow [2024-11-10 18:17:51,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 187 transitions, 903 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:51,636 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 419 flow [2024-11-10 18:17:51,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=419, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-11-10 18:17:51,639 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 13 predicate places. [2024-11-10 18:17:51,639 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 419 flow [2024-11-10 18:17:51,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.0) internal successors, (532), 14 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:51,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:51,640 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:51,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:17:51,840 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 [2024-11-10 18:17:51,841 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:51,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2064138738, now seen corresponding path program 1 times [2024-11-10 18:17:51,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:51,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870443187] [2024-11-10 18:17:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:51,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:52,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:52,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870443187] [2024-11-10 18:17:52,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870443187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:52,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:52,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:17:52,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24850550] [2024-11-10 18:17:52,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:52,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 18:17:52,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 18:17:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:17:52,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 97 [2024-11-10 18:17:52,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 419 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:52,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:52,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 97 [2024-11-10 18:17:52,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:54,041 INFO L124 PetriNetUnfolderBase]: 14417/22436 cut-off events. [2024-11-10 18:17:54,042 INFO L125 PetriNetUnfolderBase]: For 8705/8873 co-relation queries the response was YES. [2024-11-10 18:17:54,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48757 conditions, 22436 events. 14417/22436 cut-off events. For 8705/8873 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 163795 event pairs, 3928 based on Foata normal form. 0/16671 useless extension candidates. Maximal degree in co-relation 48646. Up to 12444 conditions per place. [2024-11-10 18:17:54,280 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 94 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2024-11-10 18:17:54,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 128 transitions, 728 flow [2024-11-10 18:17:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:17:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:17:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 276 transitions. [2024-11-10 18:17:54,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4742268041237113 [2024-11-10 18:17:54,282 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 419 flow. Second operand 6 states and 276 transitions. [2024-11-10 18:17:54,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 128 transitions, 728 flow [2024-11-10 18:17:54,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 724 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:54,299 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 463 flow [2024-11-10 18:17:54,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-11-10 18:17:54,300 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 18 predicate places. [2024-11-10 18:17:54,301 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 463 flow [2024-11-10 18:17:54,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:54,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:54,301 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:54,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:17:54,302 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:54,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1649798817, now seen corresponding path program 1 times [2024-11-10 18:17:54,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172573816] [2024-11-10 18:17:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:54,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:54,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172573816] [2024-11-10 18:17:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172573816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:54,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:54,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:54,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513365490] [2024-11-10 18:17:54,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:54,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:54,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 97 [2024-11-10 18:17:54,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 463 flow. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:54,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:54,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 97 [2024-11-10 18:17:54,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:55,705 INFO L124 PetriNetUnfolderBase]: 9141/15121 cut-off events. [2024-11-10 18:17:55,705 INFO L125 PetriNetUnfolderBase]: For 10102/10102 co-relation queries the response was YES. [2024-11-10 18:17:55,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35888 conditions, 15121 events. 9141/15121 cut-off events. For 10102/10102 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 113069 event pairs, 6697 based on Foata normal form. 0/11665 useless extension candidates. Maximal degree in co-relation 35774. Up to 12397 conditions per place. [2024-11-10 18:17:55,852 INFO L140 encePairwiseOnDemand]: 92/97 looper letters, 64 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-11-10 18:17:55,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 97 transitions, 599 flow [2024-11-10 18:17:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2024-11-10 18:17:55,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5128865979381443 [2024-11-10 18:17:55,854 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 463 flow. Second operand 4 states and 199 transitions. [2024-11-10 18:17:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 97 transitions, 599 flow [2024-11-10 18:17:55,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 97 transitions, 587 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:55,869 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 459 flow [2024-11-10 18:17:55,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-11-10 18:17:55,870 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 15 predicate places. [2024-11-10 18:17:55,870 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 459 flow [2024-11-10 18:17:55,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:55,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:55,871 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:55,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:17:55,871 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:55,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1649798818, now seen corresponding path program 1 times [2024-11-10 18:17:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348225617] [2024-11-10 18:17:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:55,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:55,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348225617] [2024-11-10 18:17:55,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348225617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:55,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:55,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:17:55,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925869871] [2024-11-10 18:17:55,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:55,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:17:55,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:55,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:17:55,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:17:56,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 97 [2024-11-10 18:17:56,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 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) [2024-11-10 18:17:56,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:56,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 97 [2024-11-10 18:17:56,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:58,150 INFO L124 PetriNetUnfolderBase]: 16651/26674 cut-off events. [2024-11-10 18:17:58,150 INFO L125 PetriNetUnfolderBase]: For 18498/18900 co-relation queries the response was YES. [2024-11-10 18:17:58,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64910 conditions, 26674 events. 16651/26674 cut-off events. For 18498/18900 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 204836 event pairs, 9546 based on Foata normal form. 0/21987 useless extension candidates. Maximal degree in co-relation 46728. Up to 14041 conditions per place. [2024-11-10 18:17:58,377 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 158 selfloop transitions, 13 changer transitions 0/193 dead transitions. [2024-11-10 18:17:58,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 193 transitions, 1124 flow [2024-11-10 18:17:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:17:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:17:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 391 transitions. [2024-11-10 18:17:58,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5758468335787923 [2024-11-10 18:17:58,379 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 459 flow. Second operand 7 states and 391 transitions. [2024-11-10 18:17:58,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 193 transitions, 1124 flow [2024-11-10 18:17:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 193 transitions, 1116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:58,399 INFO L231 Difference]: Finished difference. Result has 110 places, 104 transitions, 538 flow [2024-11-10 18:17:58,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=110, PETRI_TRANSITIONS=104} [2024-11-10 18:17:58,400 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 23 predicate places. [2024-11-10 18:17:58,400 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 538 flow [2024-11-10 18:17:58,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 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) [2024-11-10 18:17:58,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:58,400 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:58,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:17:58,400 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:17:58,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -745942353, now seen corresponding path program 2 times [2024-11-10 18:17:58,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:58,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979510579] [2024-11-10 18:17:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:58,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:58,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:58,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979510579] [2024-11-10 18:17:58,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979510579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:58,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203136205] [2024-11-10 18:17:58,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:17:58,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:58,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:58,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:17:58,759 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:17:58,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:17:58,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 18:17:58,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:58,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:17:58,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:17:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:17:58,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:17:58,940 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:17:58,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:17:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:17:59,106 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:17:59,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203136205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:59,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:17:59,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-10 18:17:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591250375] [2024-11-10 18:17:59,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:59,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:17:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:17:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:17:59,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 97 [2024-11-10 18:17:59,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 538 flow. Second operand has 7 states, 7 states have (on average 36.57142857142857) internal successors, (256), 7 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:59,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:59,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 97 [2024-11-10 18:17:59,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:02,959 INFO L124 PetriNetUnfolderBase]: 28079/44374 cut-off events. [2024-11-10 18:18:02,959 INFO L125 PetriNetUnfolderBase]: For 47648/49660 co-relation queries the response was YES. [2024-11-10 18:18:03,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116906 conditions, 44374 events. 28079/44374 cut-off events. For 47648/49660 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 354942 event pairs, 12564 based on Foata normal form. 1110/38136 useless extension candidates. Maximal degree in co-relation 98427. Up to 23420 conditions per place. [2024-11-10 18:18:03,643 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 137 selfloop transitions, 15 changer transitions 0/177 dead transitions. [2024-11-10 18:18:03,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 177 transitions, 1169 flow [2024-11-10 18:18:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:18:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:18:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 347 transitions. [2024-11-10 18:18:03,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5110456553755522 [2024-11-10 18:18:03,645 INFO L175 Difference]: Start difference. First operand has 110 places, 104 transitions, 538 flow. Second operand 7 states and 347 transitions. [2024-11-10 18:18:03,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 177 transitions, 1169 flow [2024-11-10 18:18:03,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 177 transitions, 1159 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:03,685 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 586 flow [2024-11-10 18:18:03,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2024-11-10 18:18:03,686 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 29 predicate places. [2024-11-10 18:18:03,686 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 586 flow [2024-11-10 18:18:03,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.57142857142857) internal successors, (256), 7 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:03,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:03,687 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:03,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:18:03,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:03,887 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:18:03,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1901992587, now seen corresponding path program 1 times [2024-11-10 18:18:03,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:03,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701198489] [2024-11-10 18:18:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:04,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:04,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701198489] [2024-11-10 18:18:04,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701198489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:04,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901606198] [2024-11-10 18:18:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:04,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:04,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:04,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:04,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:18:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:04,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:18:04,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:04,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-11-10 18:18:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:04,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:04,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2024-11-10 18:18:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:04,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901606198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:04,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:04,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-10 18:18:04,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241673984] [2024-11-10 18:18:04,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:04,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:18:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:04,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:18:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:18:04,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 97 [2024-11-10 18:18:04,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 586 flow. Second operand has 15 states, 15 states have (on average 38.93333333333333) internal successors, (584), 15 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:04,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:04,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 97 [2024-11-10 18:18:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:10,418 INFO L124 PetriNetUnfolderBase]: 36889/58784 cut-off events. [2024-11-10 18:18:10,418 INFO L125 PetriNetUnfolderBase]: For 68731/71354 co-relation queries the response was YES. [2024-11-10 18:18:10,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162561 conditions, 58784 events. 36889/58784 cut-off events. For 68731/71354 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 486600 event pairs, 18147 based on Foata normal form. 441/50461 useless extension candidates. Maximal degree in co-relation 133021. Up to 22228 conditions per place. [2024-11-10 18:18:11,257 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 152 selfloop transitions, 34 changer transitions 0/209 dead transitions. [2024-11-10 18:18:11,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 209 transitions, 1373 flow [2024-11-10 18:18:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:18:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:18:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 506 transitions. [2024-11-10 18:18:11,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5216494845360825 [2024-11-10 18:18:11,260 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 586 flow. Second operand 10 states and 506 transitions. [2024-11-10 18:18:11,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 209 transitions, 1373 flow [2024-11-10 18:18:11,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 209 transitions, 1333 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:11,491 INFO L231 Difference]: Finished difference. Result has 125 places, 114 transitions, 718 flow [2024-11-10 18:18:11,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=718, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2024-11-10 18:18:11,492 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 38 predicate places. [2024-11-10 18:18:11,492 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 718 flow [2024-11-10 18:18:11,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 38.93333333333333) internal successors, (584), 15 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:11,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:11,493 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:11,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:11,694 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,SelfDestructingSolverStorable12 [2024-11-10 18:18:11,694 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:18:11,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1845553843, now seen corresponding path program 1 times [2024-11-10 18:18:11,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:11,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316327184] [2024-11-10 18:18:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:11,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:11,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316327184] [2024-11-10 18:18:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316327184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:11,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513459134] [2024-11-10 18:18:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:11,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:11,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:11,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:18:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:11,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:18:11,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:11,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513459134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:12,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:12,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:18:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555913885] [2024-11-10 18:18:12,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:12,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:18:12,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:18:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:18:12,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 97 [2024-11-10 18:18:12,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 718 flow. Second operand has 14 states, 14 states have (on average 38.357142857142854) internal successors, (537), 14 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) [2024-11-10 18:18:12,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:12,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 97 [2024-11-10 18:18:12,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:18,800 INFO L124 PetriNetUnfolderBase]: 40619/65121 cut-off events. [2024-11-10 18:18:18,800 INFO L125 PetriNetUnfolderBase]: For 90999/93234 co-relation queries the response was YES. [2024-11-10 18:18:19,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180645 conditions, 65121 events. 40619/65121 cut-off events. For 90999/93234 co-relation queries the response was YES. Maximal size of possible extension queue 2028. Compared 552744 event pairs, 24162 based on Foata normal form. 1605/54575 useless extension candidates. Maximal degree in co-relation 157012. Up to 41888 conditions per place. [2024-11-10 18:18:19,574 INFO L140 encePairwiseOnDemand]: 85/97 looper letters, 191 selfloop transitions, 23 changer transitions 0/238 dead transitions. [2024-11-10 18:18:19,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 238 transitions, 1662 flow [2024-11-10 18:18:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:18:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:18:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 560 transitions. [2024-11-10 18:18:19,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5248359887535146 [2024-11-10 18:18:19,576 INFO L175 Difference]: Start difference. First operand has 125 places, 114 transitions, 718 flow. Second operand 11 states and 560 transitions. [2024-11-10 18:18:19,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 238 transitions, 1662 flow [2024-11-10 18:18:19,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 238 transitions, 1602 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:19,765 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 795 flow [2024-11-10 18:18:19,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=795, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2024-11-10 18:18:19,765 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 47 predicate places. [2024-11-10 18:18:19,766 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 795 flow [2024-11-10 18:18:19,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.357142857142854) internal successors, (537), 14 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) [2024-11-10 18:18:19,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:19,766 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:19,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:19,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:19,971 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:18:19,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1455198413, now seen corresponding path program 1 times [2024-11-10 18:18:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:19,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085589748] [2024-11-10 18:18:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:20,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:20,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085589748] [2024-11-10 18:18:20,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085589748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:20,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:20,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:18:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140011261] [2024-11-10 18:18:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:20,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:18:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:18:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:18:20,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 97 [2024-11-10 18:18:20,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 795 flow. Second operand has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 6 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:20,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:20,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 97 [2024-11-10 18:18:20,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:25,616 INFO L124 PetriNetUnfolderBase]: 29980/49712 cut-off events. [2024-11-10 18:18:25,616 INFO L125 PetriNetUnfolderBase]: For 97102/100324 co-relation queries the response was YES. [2024-11-10 18:18:26,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145251 conditions, 49712 events. 29980/49712 cut-off events. For 97102/100324 co-relation queries the response was YES. Maximal size of possible extension queue 1535. Compared 425988 event pairs, 20199 based on Foata normal form. 1679/44242 useless extension candidates. Maximal degree in co-relation 125905. Up to 32074 conditions per place. [2024-11-10 18:18:26,268 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 176 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-11-10 18:18:26,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 215 transitions, 1728 flow [2024-11-10 18:18:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:18:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:18:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 375 transitions. [2024-11-10 18:18:26,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5522827687776142 [2024-11-10 18:18:26,270 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 795 flow. Second operand 7 states and 375 transitions. [2024-11-10 18:18:26,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 215 transitions, 1728 flow [2024-11-10 18:18:26,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 215 transitions, 1705 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:26,433 INFO L231 Difference]: Finished difference. Result has 139 places, 127 transitions, 846 flow [2024-11-10 18:18:26,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=846, PETRI_PLACES=139, PETRI_TRANSITIONS=127} [2024-11-10 18:18:26,434 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 52 predicate places. [2024-11-10 18:18:26,434 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 846 flow [2024-11-10 18:18:26,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 6 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:26,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:26,435 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:26,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 18:18:26,435 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:18:26,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2122420716, now seen corresponding path program 1 times [2024-11-10 18:18:26,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:26,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634892842] [2024-11-10 18:18:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:26,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:18:26,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:26,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634892842] [2024-11-10 18:18:26,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634892842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:26,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:26,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 18:18:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007784633] [2024-11-10 18:18:26,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:26,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:18:26,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:18:26,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:18:26,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 97 [2024-11-10 18:18:26,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 127 transitions, 846 flow. Second operand has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:26,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:26,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 97 [2024-11-10 18:18:26,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:32,121 INFO L124 PetriNetUnfolderBase]: 28243/47029 cut-off events. [2024-11-10 18:18:32,122 INFO L125 PetriNetUnfolderBase]: For 98897/101565 co-relation queries the response was YES. [2024-11-10 18:18:32,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142578 conditions, 47029 events. 28243/47029 cut-off events. For 98897/101565 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 403285 event pairs, 19278 based on Foata normal form. 1427/41729 useless extension candidates. Maximal degree in co-relation 123835. Up to 32757 conditions per place. [2024-11-10 18:18:32,737 INFO L140 encePairwiseOnDemand]: 88/97 looper letters, 154 selfloop transitions, 12 changer transitions 0/194 dead transitions. [2024-11-10 18:18:32,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 194 transitions, 1609 flow [2024-11-10 18:18:32,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:18:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:18:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 365 transitions. [2024-11-10 18:18:32,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5375552282768777 [2024-11-10 18:18:32,739 INFO L175 Difference]: Start difference. First operand has 139 places, 127 transitions, 846 flow. Second operand 7 states and 365 transitions. [2024-11-10 18:18:32,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 194 transitions, 1609 flow [2024-11-10 18:18:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 1597 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:18:32,897 INFO L231 Difference]: Finished difference. Result has 145 places, 132 transitions, 896 flow [2024-11-10 18:18:32,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=896, PETRI_PLACES=145, PETRI_TRANSITIONS=132} [2024-11-10 18:18:32,898 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 58 predicate places. [2024-11-10 18:18:32,898 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 132 transitions, 896 flow [2024-11-10 18:18:32,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.5) internal successors, (237), 6 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:32,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:32,898 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:32,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 18:18:32,899 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:18:32,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1814156889, now seen corresponding path program 2 times [2024-11-10 18:18:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:32,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008274382] [2024-11-10 18:18:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:33,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008274382] [2024-11-10 18:18:33,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008274382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337694232] [2024-11-10 18:18:33,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:18:33,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:33,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:33,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:33,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:18:33,201 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:18:33,202 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:18:33,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:18:33,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:33,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:18:33,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:18:33,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:18:33,272 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:18:33,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:18:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:33,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:33,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:18:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:33,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337694232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:33,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:33,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-10 18:18:33,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415320621] [2024-11-10 18:18:33,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:33,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 18:18:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 18:18:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-10 18:18:34,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 97 [2024-11-10 18:18:34,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 132 transitions, 896 flow. Second operand has 16 states, 16 states have (on average 37.0625) internal successors, (593), 16 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:34,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:34,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 97 [2024-11-10 18:18:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:42,664 INFO L124 PetriNetUnfolderBase]: 42175/67010 cut-off events. [2024-11-10 18:18:42,664 INFO L125 PetriNetUnfolderBase]: For 127622/131938 co-relation queries the response was YES. [2024-11-10 18:18:43,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211172 conditions, 67010 events. 42175/67010 cut-off events. For 127622/131938 co-relation queries the response was YES. Maximal size of possible extension queue 1710. Compared 553634 event pairs, 7269 based on Foata normal form. 2207/60493 useless extension candidates. Maximal degree in co-relation 190937. Up to 13900 conditions per place. [2024-11-10 18:18:43,733 INFO L140 encePairwiseOnDemand]: 87/97 looper letters, 257 selfloop transitions, 36 changer transitions 0/324 dead transitions. [2024-11-10 18:18:43,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 324 transitions, 2494 flow [2024-11-10 18:18:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 18:18:43,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 18:18:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 656 transitions. [2024-11-10 18:18:43,736 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5202220459952419 [2024-11-10 18:18:43,736 INFO L175 Difference]: Start difference. First operand has 145 places, 132 transitions, 896 flow. Second operand 13 states and 656 transitions. [2024-11-10 18:18:43,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 324 transitions, 2494 flow [2024-11-10 18:18:44,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 324 transitions, 2482 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:18:44,639 INFO L231 Difference]: Finished difference. Result has 157 places, 142 transitions, 1100 flow [2024-11-10 18:18:44,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1100, PETRI_PLACES=157, PETRI_TRANSITIONS=142} [2024-11-10 18:18:44,640 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 70 predicate places. [2024-11-10 18:18:44,640 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 142 transitions, 1100 flow [2024-11-10 18:18:44,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 37.0625) internal successors, (593), 16 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:44,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:44,640 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:44,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:44,841 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 [2024-11-10 18:18:44,841 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-10 18:18:44,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1186203134, now seen corresponding path program 2 times [2024-11-10 18:18:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037979987] [2024-11-10 18:18:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:44,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037979987] [2024-11-10 18:18:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037979987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104356083] [2024-11-10 18:18:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:18:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:45,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:18:45,116 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:18:45,117 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:18:45,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 18:18:45,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:45,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:18:45,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2024-11-10 18:18:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 18:18:45,423 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:18:45,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104356083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:45,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:18:45,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-10 18:18:45,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009898796] [2024-11-10 18:18:45,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:45,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 18:18:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:45,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 18:18:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:18:45,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 97 [2024-11-10 18:18:45,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 142 transitions, 1100 flow. Second operand has 8 states, 8 states have (on average 40.625) internal successors, (325), 8 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:45,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:45,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 97 [2024-11-10 18:18:45,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand