./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-prod-cons3.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 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:55:23,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:55:23,839 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:55:23,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:55:23,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:55:23,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:55:23,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:55:23,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:55:23,873 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:55:23,874 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:55:23,874 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:55:23,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:55:23,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:55:23,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:55:23,877 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:55:23,877 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:55:23,877 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:55:23,878 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:55:23,878 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:55:23,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:55:23,878 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:55:23,879 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:55:23,880 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:55:23,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:55:23,880 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:55:23,880 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:55:23,880 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:55:23,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:55:23,881 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:55:23,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:55:23,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:55:23,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:55:23,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:55:23,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:55:23,882 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:55:23,882 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:55:23,882 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:55:23,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:55:23,883 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:55:23,883 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:55:23,883 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:55:23,883 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:55:23,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 [2024-11-09 10:55:24,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:55:24,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:55:24,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:55:24,110 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:55:24,111 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:55:24,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2024-11-09 10:55:25,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:55:25,486 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:55:25,486 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2024-11-09 10:55:25,492 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a887f5908/7403a195cbb1454daab3b90c02fb01cc/FLAG9a076d296 [2024-11-09 10:55:25,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a887f5908/7403a195cbb1454daab3b90c02fb01cc [2024-11-09 10:55:25,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:55:25,899 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:55:25,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:55:25,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:55:25,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:55:25,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:25" (1/1) ... [2024-11-09 10:55:25,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772ce16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:25, skipping insertion in model container [2024-11-09 10:55:25,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:25" (1/1) ... [2024-11-09 10:55:25,923 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:55:26,117 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:55:26,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:55:26,133 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:55:26,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:55:26,167 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:55:26,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26 WrapperNode [2024-11-09 10:55:26,167 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:55:26,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:55:26,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:55:26,168 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:55:26,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,199 INFO L138 Inliner]: procedures = 25, calls = 54, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 258 [2024-11-09 10:55:26,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:55:26,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:55:26,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:55:26,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:55:26,208 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,212 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,226 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-11-09 10:55:26,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,232 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,236 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,237 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:55:26,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:55:26,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:55:26,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:55:26,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (1/1) ... [2024-11-09 10:55:26,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:55:26,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:26,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:55:26,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:55:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:55:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:55:26,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:55:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:55:26,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:55:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:55:26,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:55:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-09 10:55:26,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:55:26,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:55:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:55:26,304 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:55:26,392 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:55:26,393 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:55:26,699 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:55:26,699 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:55:26,989 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:55:26,990 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-09 10:55:26,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:26 BoogieIcfgContainer [2024-11-09 10:55:26,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:55:26,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:55:26,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:55:26,995 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:55:26,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:55:25" (1/3) ... [2024-11-09 10:55:26,996 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c78703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:26, skipping insertion in model container [2024-11-09 10:55:26,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:26" (2/3) ... [2024-11-09 10:55:26,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c78703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:26, skipping insertion in model container [2024-11-09 10:55:26,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:26" (3/3) ... [2024-11-09 10:55:26,999 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2024-11-09 10:55:27,012 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:55:27,013 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-09 10:55:27,013 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:55:27,057 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:55:27,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 67 transitions, 162 flow [2024-11-09 10:55:27,106 INFO L124 PetriNetUnfolderBase]: 6/63 cut-off events. [2024-11-09 10:55:27,106 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:55:27,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 63 events. 6/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 153 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-11-09 10:55:27,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 67 transitions, 162 flow [2024-11-09 10:55:27,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 62 transitions, 148 flow [2024-11-09 10:55:27,119 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:55:27,124 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;@326b0ff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:55:27,125 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-09 10:55:27,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:55:27,127 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:55:27,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:55:27,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:27,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:55:27,128 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:27,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash 741799, now seen corresponding path program 1 times [2024-11-09 10:55:27,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:27,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612242286] [2024-11-09 10:55:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:27,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:27,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612242286] [2024-11-09 10:55:27,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612242286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:27,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:27,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:55:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610590020] [2024-11-09 10:55:27,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:27,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:27,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:27,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:27,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:27,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:27,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:27,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:28,438 INFO L124 PetriNetUnfolderBase]: 7841/11938 cut-off events. [2024-11-09 10:55:28,439 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2024-11-09 10:55:28,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23244 conditions, 11938 events. 7841/11938 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 86985 event pairs, 6340 based on Foata normal form. 1/8027 useless extension candidates. Maximal degree in co-relation 22236. Up to 10274 conditions per place. [2024-11-09 10:55:28,518 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 39 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-09 10:55:28,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 222 flow [2024-11-09 10:55:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-11-09 10:55:28,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5472636815920398 [2024-11-09 10:55:28,530 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 148 flow. Second operand 3 states and 110 transitions. [2024-11-09 10:55:28,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 222 flow [2024-11-09 10:55:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 206 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:55:28,543 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 128 flow [2024-11-09 10:55:28,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-11-09 10:55:28,548 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -10 predicate places. [2024-11-09 10:55:28,549 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 128 flow [2024-11-09 10:55:28,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:28,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:28,549 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:55:28,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:55:28,550 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:28,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash 741800, now seen corresponding path program 1 times [2024-11-09 10:55:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:28,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784891556] [2024-11-09 10:55:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:28,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:28,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784891556] [2024-11-09 10:55:28,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784891556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:28,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:28,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:28,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51730569] [2024-11-09 10:55:28,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:28,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:28,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:28,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:28,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:28,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:28,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:28,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:28,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:29,567 INFO L124 PetriNetUnfolderBase]: 7842/11941 cut-off events. [2024-11-09 10:55:29,569 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-09 10:55:29,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22679 conditions, 11941 events. 7842/11941 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87078 event pairs, 6340 based on Foata normal form. 0/8027 useless extension candidates. Maximal degree in co-relation 22650. Up to 10283 conditions per place. [2024-11-09 10:55:29,628 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 42 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-09 10:55:29,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 226 flow [2024-11-09 10:55:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-09 10:55:29,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.503731343283582 [2024-11-09 10:55:29,630 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-11-09 10:55:29,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 226 flow [2024-11-09 10:55:29,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:29,633 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 151 flow [2024-11-09 10:55:29,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-11-09 10:55:29,636 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2024-11-09 10:55:29,636 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 151 flow [2024-11-09 10:55:29,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:29,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:29,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:55:29,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:55:29,637 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:29,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash 22997769, now seen corresponding path program 1 times [2024-11-09 10:55:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:29,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290156622] [2024-11-09 10:55:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:29,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:29,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:29,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290156622] [2024-11-09 10:55:29,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290156622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:29,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:29,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:29,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005858981] [2024-11-09 10:55:29,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:29,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:29,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:29,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:29,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:29,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:29,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:29,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:30,618 INFO L124 PetriNetUnfolderBase]: 7843/11944 cut-off events. [2024-11-09 10:55:30,619 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-09 10:55:30,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22696 conditions, 11944 events. 7843/11944 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87105 event pairs, 6340 based on Foata normal form. 0/8029 useless extension candidates. Maximal degree in co-relation 22671. Up to 10282 conditions per place. [2024-11-09 10:55:30,694 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 42 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-09 10:55:30,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 255 flow [2024-11-09 10:55:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-09 10:55:30,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2024-11-09 10:55:30,698 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 151 flow. Second operand 5 states and 160 transitions. [2024-11-09 10:55:30,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 255 flow [2024-11-09 10:55:30,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:30,702 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 185 flow [2024-11-09 10:55:30,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-11-09 10:55:30,703 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-11-09 10:55:30,704 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 185 flow [2024-11-09 10:55:30,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:30,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:30,705 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:55:30,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:55:30,705 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:30,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash 712893733, now seen corresponding path program 1 times [2024-11-09 10:55:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:30,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811053504] [2024-11-09 10:55:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:30,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:30,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811053504] [2024-11-09 10:55:30,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811053504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241570518] [2024-11-09 10:55:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:30,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:30,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:30,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:30,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:55:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:30,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:55:30,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:31,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:55:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:31,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:31,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241570518] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:31,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:31,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:55:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095739281] [2024-11-09 10:55:31,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:31,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:55:31,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:55:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:55:31,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:31,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 185 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:31,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:31,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:31,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:32,042 INFO L124 PetriNetUnfolderBase]: 7844/11946 cut-off events. [2024-11-09 10:55:32,043 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-09 10:55:32,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22719 conditions, 11946 events. 7844/11946 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87114 event pairs, 6340 based on Foata normal form. 0/8034 useless extension candidates. Maximal degree in co-relation 22681. Up to 10283 conditions per place. [2024-11-09 10:55:32,121 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-09 10:55:32,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 298 flow [2024-11-09 10:55:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:55:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:55:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-11-09 10:55:32,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4216417910447761 [2024-11-09 10:55:32,124 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 185 flow. Second operand 8 states and 226 transitions. [2024-11-09 10:55:32,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 298 flow [2024-11-09 10:55:32,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:32,130 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 215 flow [2024-11-09 10:55:32,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-11-09 10:55:32,130 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-09 10:55:32,131 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 215 flow [2024-11-09 10:55:32,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:32,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:32,131 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:55:32,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:55:32,332 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 [2024-11-09 10:55:32,333 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:32,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash 626042671, now seen corresponding path program 1 times [2024-11-09 10:55:32,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:32,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133900985] [2024-11-09 10:55:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:32,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133900985] [2024-11-09 10:55:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133900985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668566296] [2024-11-09 10:55:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:32,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:32,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:32,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:32,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:55:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:32,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:55:32,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:32,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:55:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:32,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668566296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:32,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:32,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:55:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036439131] [2024-11-09 10:55:32,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:32,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:55:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:32,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:55:32,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:55:32,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:32,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 215 flow. Second operand has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:32,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:32,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:32,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:33,590 INFO L124 PetriNetUnfolderBase]: 7845/11948 cut-off events. [2024-11-09 10:55:33,590 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-09 10:55:33,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22735 conditions, 11948 events. 7845/11948 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87118 event pairs, 6340 based on Foata normal form. 0/8036 useless extension candidates. Maximal degree in co-relation 22689. Up to 10275 conditions per place. [2024-11-09 10:55:33,641 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 35 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2024-11-09 10:55:33,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 329 flow [2024-11-09 10:55:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:55:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:55:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-11-09 10:55:33,643 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41956882255389716 [2024-11-09 10:55:33,643 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 215 flow. Second operand 9 states and 253 transitions. [2024-11-09 10:55:33,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 329 flow [2024-11-09 10:55:33,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 282 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-09 10:55:33,645 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 212 flow [2024-11-09 10:55:33,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=212, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-09 10:55:33,646 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-09 10:55:33,646 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 212 flow [2024-11-09 10:55:33,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:33,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:33,647 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:33,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:55:33,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:33,847 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:33,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash -267135375, now seen corresponding path program 1 times [2024-11-09 10:55:33,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:33,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695563532] [2024-11-09 10:55:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:33,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:33,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:33,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695563532] [2024-11-09 10:55:33,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695563532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:33,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:33,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343516203] [2024-11-09 10:55:33,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:33,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:33,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-09 10:55:33,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:33,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:33,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-09 10:55:33,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:34,649 INFO L124 PetriNetUnfolderBase]: 8974/13584 cut-off events. [2024-11-09 10:55:34,649 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:55:34,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26098 conditions, 13584 events. 8974/13584 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 98408 event pairs, 7442 based on Foata normal form. 264/9765 useless extension candidates. Maximal degree in co-relation 22422. Up to 10289 conditions per place. [2024-11-09 10:55:34,719 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 81 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2024-11-09 10:55:34,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 496 flow [2024-11-09 10:55:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-11-09 10:55:34,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5970149253731343 [2024-11-09 10:55:34,721 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 212 flow. Second operand 5 states and 200 transitions. [2024-11-09 10:55:34,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 496 flow [2024-11-09 10:55:34,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 443 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-09 10:55:34,723 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 218 flow [2024-11-09 10:55:34,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-11-09 10:55:34,724 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-09 10:55:34,724 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 218 flow [2024-11-09 10:55:34,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:34,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:34,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:34,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:55:34,725 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:34,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 91691054, now seen corresponding path program 1 times [2024-11-09 10:55:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:34,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803904795] [2024-11-09 10:55:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:34,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803904795] [2024-11-09 10:55:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803904795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:34,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586867430] [2024-11-09 10:55:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:34,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:34,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:34,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:34,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:55:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:34,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:55:34,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:34,993 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 [2024-11-09 10:55:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:55:35,046 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 [2024-11-09 10:55:35,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:55:35,059 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 [2024-11-09 10:55:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:35,087 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:55:35,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586867430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:35,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:55:35,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-09 10:55:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333875882] [2024-11-09 10:55:35,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:35,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:55:35,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:35,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:35,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:35,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:35,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:35,831 INFO L124 PetriNetUnfolderBase]: 6994/10942 cut-off events. [2024-11-09 10:55:35,831 INFO L125 PetriNetUnfolderBase]: For 808/808 co-relation queries the response was YES. [2024-11-09 10:55:35,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 10942 events. 6994/10942 cut-off events. For 808/808 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 78756 event pairs, 5898 based on Foata normal form. 0/8156 useless extension candidates. Maximal degree in co-relation 18707. Up to 9373 conditions per place. [2024-11-09 10:55:35,899 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 49 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-09 10:55:35,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 316 flow [2024-11-09 10:55:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-11-09 10:55:35,900 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48134328358208955 [2024-11-09 10:55:35,901 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 218 flow. Second operand 4 states and 129 transitions. [2024-11-09 10:55:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 316 flow [2024-11-09 10:55:35,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:35,903 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 213 flow [2024-11-09 10:55:35,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-09 10:55:35,904 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-09 10:55:35,904 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 213 flow [2024-11-09 10:55:35,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:35,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:35,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:35,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:55:36,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:36,109 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:36,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash 91691053, now seen corresponding path program 1 times [2024-11-09 10:55:36,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:36,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125454345] [2024-11-09 10:55:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:36,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:36,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125454345] [2024-11-09 10:55:36,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125454345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:36,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:36,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:36,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075603525] [2024-11-09 10:55:36,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:36,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:36,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:36,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:36,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:36,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:36,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:36,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:36,602 INFO L124 PetriNetUnfolderBase]: 5302/8448 cut-off events. [2024-11-09 10:55:36,602 INFO L125 PetriNetUnfolderBase]: For 698/698 co-relation queries the response was YES. [2024-11-09 10:55:36,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16695 conditions, 8448 events. 5302/8448 cut-off events. For 698/698 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 58565 event pairs, 4566 based on Foata normal form. 0/6819 useless extension candidates. Maximal degree in co-relation 13039. Up to 7180 conditions per place. [2024-11-09 10:55:36,634 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 43 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-09 10:55:36,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 307 flow [2024-11-09 10:55:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-09 10:55:36,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44477611940298506 [2024-11-09 10:55:36,636 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 213 flow. Second operand 5 states and 149 transitions. [2024-11-09 10:55:36,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 307 flow [2024-11-09 10:55:36,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:36,637 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 216 flow [2024-11-09 10:55:36,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-09 10:55:36,638 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-09 10:55:36,638 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 216 flow [2024-11-09 10:55:36,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:36,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:36,638 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:36,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:55:36,639 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:36,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1704488768, now seen corresponding path program 1 times [2024-11-09 10:55:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:36,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710147190] [2024-11-09 10:55:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:36,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:36,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710147190] [2024-11-09 10:55:36,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710147190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:36,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:55:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701056901] [2024-11-09 10:55:36,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:36,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:36,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-09 10:55:36,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:36,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:36,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-09 10:55:36,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:37,050 INFO L124 PetriNetUnfolderBase]: 5654/8603 cut-off events. [2024-11-09 10:55:37,050 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2024-11-09 10:55:37,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17259 conditions, 8603 events. 5654/8603 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53035 event pairs, 2351 based on Foata normal form. 180/7128 useless extension candidates. Maximal degree in co-relation 15373. Up to 4588 conditions per place. [2024-11-09 10:55:37,087 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 72 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-11-09 10:55:37,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 420 flow [2024-11-09 10:55:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-11-09 10:55:37,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6716417910447762 [2024-11-09 10:55:37,088 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 216 flow. Second operand 3 states and 135 transitions. [2024-11-09 10:55:37,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 420 flow [2024-11-09 10:55:37,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:55:37,090 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 220 flow [2024-11-09 10:55:37,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-11-09 10:55:37,090 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-09 10:55:37,090 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 220 flow [2024-11-09 10:55:37,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:37,091 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:37,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:55:37,091 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:37,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash 677378861, now seen corresponding path program 1 times [2024-11-09 10:55:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:37,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453500391] [2024-11-09 10:55:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:37,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:37,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:37,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453500391] [2024-11-09 10:55:37,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453500391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:37,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:37,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:37,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741152317] [2024-11-09 10:55:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:37,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:37,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:37,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:37,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-09 10:55:37,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:37,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-09 10:55:37,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:37,482 INFO L124 PetriNetUnfolderBase]: 5347/8363 cut-off events. [2024-11-09 10:55:37,482 INFO L125 PetriNetUnfolderBase]: For 996/996 co-relation queries the response was YES. [2024-11-09 10:55:37,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17734 conditions, 8363 events. 5347/8363 cut-off events. For 996/996 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 50219 event pairs, 2210 based on Foata normal form. 74/7419 useless extension candidates. Maximal degree in co-relation 15850. Up to 5580 conditions per place. [2024-11-09 10:55:37,518 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 70 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-09 10:55:37,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 413 flow [2024-11-09 10:55:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-11-09 10:55:37,519 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6467661691542289 [2024-11-09 10:55:37,519 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 220 flow. Second operand 3 states and 130 transitions. [2024-11-09 10:55:37,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 413 flow [2024-11-09 10:55:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:37,523 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 232 flow [2024-11-09 10:55:37,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-09 10:55:37,523 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2024-11-09 10:55:37,523 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 232 flow [2024-11-09 10:55:37,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:37,523 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:37,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:55:37,524 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:37,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1448779813, now seen corresponding path program 1 times [2024-11-09 10:55:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368375664] [2024-11-09 10:55:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368375664] [2024-11-09 10:55:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368375664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:37,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:37,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771454148] [2024-11-09 10:55:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:37,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:37,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:37,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-09 10:55:37,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:37,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-09 10:55:37,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:38,161 INFO L124 PetriNetUnfolderBase]: 7387/12042 cut-off events. [2024-11-09 10:55:38,161 INFO L125 PetriNetUnfolderBase]: For 2990/3001 co-relation queries the response was YES. [2024-11-09 10:55:38,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 12042 events. 7387/12042 cut-off events. For 2990/3001 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 82167 event pairs, 6127 based on Foata normal form. 172/10893 useless extension candidates. Maximal degree in co-relation 21869. Up to 7217 conditions per place. [2024-11-09 10:55:38,214 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 71 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2024-11-09 10:55:38,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 459 flow [2024-11-09 10:55:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-09 10:55:38,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6082089552238806 [2024-11-09 10:55:38,216 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 232 flow. Second operand 4 states and 163 transitions. [2024-11-09 10:55:38,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 459 flow [2024-11-09 10:55:38,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 448 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:38,220 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 248 flow [2024-11-09 10:55:38,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-11-09 10:55:38,220 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-09 10:55:38,220 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 248 flow [2024-11-09 10:55:38,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:38,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:38,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:38,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:55:38,221 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:38,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:38,221 INFO L85 PathProgramCache]: Analyzing trace with hash -612879199, now seen corresponding path program 1 times [2024-11-09 10:55:38,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:38,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759436046] [2024-11-09 10:55:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:38,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:38,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759436046] [2024-11-09 10:55:38,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759436046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:38,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793367742] [2024-11-09 10:55:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:38,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:38,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:38,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:38,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:55:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:38,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:55:38,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:38,506 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:55:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793367742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:38,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:55:38,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-09 10:55:38,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81397771] [2024-11-09 10:55:38,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:38,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:55:38,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-09 10:55:38,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:38,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:38,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-09 10:55:38,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:38,965 INFO L124 PetriNetUnfolderBase]: 6193/10414 cut-off events. [2024-11-09 10:55:38,965 INFO L125 PetriNetUnfolderBase]: For 1612/1634 co-relation queries the response was YES. [2024-11-09 10:55:38,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21289 conditions, 10414 events. 6193/10414 cut-off events. For 1612/1634 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 72785 event pairs, 5251 based on Foata normal form. 0/9603 useless extension candidates. Maximal degree in co-relation 17587. Up to 8505 conditions per place. [2024-11-09 10:55:39,012 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 44 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-09 10:55:39,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 342 flow [2024-11-09 10:55:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-09 10:55:39,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962686567164179 [2024-11-09 10:55:39,013 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 248 flow. Second operand 4 states and 133 transitions. [2024-11-09 10:55:39,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 342 flow [2024-11-09 10:55:39,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:39,015 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 249 flow [2024-11-09 10:55:39,015 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-09 10:55:39,015 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-09 10:55:39,015 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 249 flow [2024-11-09 10:55:39,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:39,016 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:39,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:55:39,216 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 [2024-11-09 10:55:39,216 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:39,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash -612879200, now seen corresponding path program 1 times [2024-11-09 10:55:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:39,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201886159] [2024-11-09 10:55:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:39,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:39,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201886159] [2024-11-09 10:55:39,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201886159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:39,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:39,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:39,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699948447] [2024-11-09 10:55:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:39,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:39,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:39,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:39,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:39,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:39,706 INFO L124 PetriNetUnfolderBase]: 5205/9044 cut-off events. [2024-11-09 10:55:39,706 INFO L125 PetriNetUnfolderBase]: For 1414/1431 co-relation queries the response was YES. [2024-11-09 10:55:39,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17972 conditions, 9044 events. 5205/9044 cut-off events. For 1414/1431 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 64959 event pairs, 4517 based on Foata normal form. 198/8673 useless extension candidates. Maximal degree in co-relation 14265. Up to 7213 conditions per place. [2024-11-09 10:55:39,746 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 44 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-11-09 10:55:39,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 339 flow [2024-11-09 10:55:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-09 10:55:39,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.458955223880597 [2024-11-09 10:55:39,747 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 249 flow. Second operand 4 states and 123 transitions. [2024-11-09 10:55:39,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 339 flow [2024-11-09 10:55:39,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 64 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:39,749 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 241 flow [2024-11-09 10:55:39,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-11-09 10:55:39,750 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 6 predicate places. [2024-11-09 10:55:39,750 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 241 flow [2024-11-09 10:55:39,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:39,751 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:39,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:55:39,751 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:39,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2004598816, now seen corresponding path program 1 times [2024-11-09 10:55:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695235880] [2024-11-09 10:55:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695235880] [2024-11-09 10:55:39,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695235880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:39,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:39,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262516319] [2024-11-09 10:55:39,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:39,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:39,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:39,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-09 10:55:39,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:39,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:39,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-09 10:55:39,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:40,366 INFO L124 PetriNetUnfolderBase]: 8061/12379 cut-off events. [2024-11-09 10:55:40,367 INFO L125 PetriNetUnfolderBase]: For 2001/2001 co-relation queries the response was YES. [2024-11-09 10:55:40,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25817 conditions, 12379 events. 8061/12379 cut-off events. For 2001/2001 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 75856 event pairs, 1483 based on Foata normal form. 430/12555 useless extension candidates. Maximal degree in co-relation 20267. Up to 6696 conditions per place. [2024-11-09 10:55:40,422 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 80 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2024-11-09 10:55:40,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 499 flow [2024-11-09 10:55:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-09 10:55:40,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5597014925373134 [2024-11-09 10:55:40,423 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 241 flow. Second operand 4 states and 150 transitions. [2024-11-09 10:55:40,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 499 flow [2024-11-09 10:55:40,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:40,425 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 256 flow [2024-11-09 10:55:40,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-11-09 10:55:40,426 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 9 predicate places. [2024-11-09 10:55:40,426 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 256 flow [2024-11-09 10:55:40,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:40,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:40,426 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:40,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:55:40,426 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:40,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:40,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1156607850, now seen corresponding path program 2 times [2024-11-09 10:55:40,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:40,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651410105] [2024-11-09 10:55:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:40,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:40,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:40,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651410105] [2024-11-09 10:55:40,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651410105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:40,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:40,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111961948] [2024-11-09 10:55:40,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:40,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:40,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-09 10:55:40,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:40,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:40,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-09 10:55:40,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:41,033 INFO L124 PetriNetUnfolderBase]: 7864/11931 cut-off events. [2024-11-09 10:55:41,033 INFO L125 PetriNetUnfolderBase]: For 3186/3513 co-relation queries the response was YES. [2024-11-09 10:55:41,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26852 conditions, 11931 events. 7864/11931 cut-off events. For 3186/3513 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 70326 event pairs, 1763 based on Foata normal form. 599/12306 useless extension candidates. Maximal degree in co-relation 21887. Up to 7842 conditions per place. [2024-11-09 10:55:41,086 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 79 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2024-11-09 10:55:41,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 529 flow [2024-11-09 10:55:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-11-09 10:55:41,087 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5522388059701493 [2024-11-09 10:55:41,087 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 256 flow. Second operand 4 states and 148 transitions. [2024-11-09 10:55:41,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 529 flow [2024-11-09 10:55:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:41,091 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 286 flow [2024-11-09 10:55:41,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-09 10:55:41,091 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-11-09 10:55:41,091 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 286 flow [2024-11-09 10:55:41,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:41,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:41,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:41,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:55:41,092 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:41,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1196721288, now seen corresponding path program 3 times [2024-11-09 10:55:41,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:41,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680722554] [2024-11-09 10:55:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:41,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:41,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:41,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680722554] [2024-11-09 10:55:41,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680722554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:41,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:41,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:55:41,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228962847] [2024-11-09 10:55:41,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:41,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:41,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:41,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:41,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:41,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2024-11-09 10:55:41,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:41,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:41,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2024-11-09 10:55:41,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:41,971 INFO L124 PetriNetUnfolderBase]: 10490/15926 cut-off events. [2024-11-09 10:55:41,971 INFO L125 PetriNetUnfolderBase]: For 8368/8536 co-relation queries the response was YES. [2024-11-09 10:55:42,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39348 conditions, 15926 events. 10490/15926 cut-off events. For 8368/8536 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 96327 event pairs, 2376 based on Foata normal form. 454/16148 useless extension candidates. Maximal degree in co-relation 30963. Up to 8755 conditions per place. [2024-11-09 10:55:42,060 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 112 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2024-11-09 10:55:42,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 737 flow [2024-11-09 10:55:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:55:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:55:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-11-09 10:55:42,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5298507462686567 [2024-11-09 10:55:42,061 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 286 flow. Second operand 6 states and 213 transitions. [2024-11-09 10:55:42,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 737 flow [2024-11-09 10:55:42,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:42,069 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 341 flow [2024-11-09 10:55:42,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-11-09 10:55:42,070 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 19 predicate places. [2024-11-09 10:55:42,070 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 341 flow [2024-11-09 10:55:42,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:42,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:42,070 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:42,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:55:42,070 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:42,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1006149498, now seen corresponding path program 4 times [2024-11-09 10:55:42,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:42,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056857619] [2024-11-09 10:55:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:42,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:42,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:42,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056857619] [2024-11-09 10:55:42,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056857619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:42,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:42,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:55:42,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766207024] [2024-11-09 10:55:42,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:42,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:42,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:42,183 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-09 10:55:42,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 341 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:42,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:42,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-09 10:55:42,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:43,395 INFO L124 PetriNetUnfolderBase]: 10957/17344 cut-off events. [2024-11-09 10:55:43,395 INFO L125 PetriNetUnfolderBase]: For 15361/15732 co-relation queries the response was YES. [2024-11-09 10:55:43,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44357 conditions, 17344 events. 10957/17344 cut-off events. For 15361/15732 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 114121 event pairs, 2066 based on Foata normal form. 830/17943 useless extension candidates. Maximal degree in co-relation 35515. Up to 7857 conditions per place. [2024-11-09 10:55:43,516 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 94 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-11-09 10:55:43,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 692 flow [2024-11-09 10:55:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-09 10:55:43,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462686567164179 [2024-11-09 10:55:43,517 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 341 flow. Second operand 5 states and 183 transitions. [2024-11-09 10:55:43,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 692 flow [2024-11-09 10:55:43,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 677 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:55:43,548 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 361 flow [2024-11-09 10:55:43,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2024-11-09 10:55:43,549 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 21 predicate places. [2024-11-09 10:55:43,549 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 361 flow [2024-11-09 10:55:43,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:43,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:43,549 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:43,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:55:43,549 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:43,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash -172132478, now seen corresponding path program 5 times [2024-11-09 10:55:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:43,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015377715] [2024-11-09 10:55:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:43,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:43,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:43,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015377715] [2024-11-09 10:55:43,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015377715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:43,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:43,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:55:43,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730641088] [2024-11-09 10:55:43,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:43,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:43,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:43,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-09 10:55:43,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:43,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:43,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-09 10:55:43,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:44,788 INFO L124 PetriNetUnfolderBase]: 12331/19420 cut-off events. [2024-11-09 10:55:44,788 INFO L125 PetriNetUnfolderBase]: For 21648/22484 co-relation queries the response was YES. [2024-11-09 10:55:44,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50397 conditions, 19420 events. 12331/19420 cut-off events. For 21648/22484 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 130797 event pairs, 7710 based on Foata normal form. 381/18732 useless extension candidates. Maximal degree in co-relation 43766. Up to 11998 conditions per place. [2024-11-09 10:55:44,872 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 73 selfloop transitions, 6 changer transitions 13/111 dead transitions. [2024-11-09 10:55:44,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 677 flow [2024-11-09 10:55:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-11-09 10:55:44,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5432835820895522 [2024-11-09 10:55:44,873 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 361 flow. Second operand 5 states and 182 transitions. [2024-11-09 10:55:44,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 677 flow [2024-11-09 10:55:44,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 658 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-09 10:55:44,915 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 348 flow [2024-11-09 10:55:44,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-11-09 10:55:44,915 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 24 predicate places. [2024-11-09 10:55:44,915 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 348 flow [2024-11-09 10:55:44,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:44,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:44,916 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:44,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:55:44,916 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:44,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -164646972, now seen corresponding path program 1 times [2024-11-09 10:55:44,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:44,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120172902] [2024-11-09 10:55:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:45,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:45,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120172902] [2024-11-09 10:55:45,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120172902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:45,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557431512] [2024-11-09 10:55:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:45,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:45,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:45,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:55:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:45,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 10:55:45,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:46,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 10:55:46,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:46,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2024-11-09 10:55:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:46,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:47,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:47,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 150 [2024-11-09 10:55:47,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:47,355 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 35 treesize of output 31 [2024-11-09 10:55:47,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:47,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 168 [2024-11-09 10:55:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:47,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557431512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:47,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:47,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-09 10:55:47,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987891576] [2024-11-09 10:55:47,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:47,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 10:55:47,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 10:55:47,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 10:55:48,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-09 10:55:48,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 348 flow. Second operand has 38 states, 38 states have (on average 23.842105263157894) internal successors, (906), 38 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:48,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:48,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-09 10:55:48,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:57,250 INFO L124 PetriNetUnfolderBase]: 49481/74019 cut-off events. [2024-11-09 10:55:57,251 INFO L125 PetriNetUnfolderBase]: For 75341/79328 co-relation queries the response was YES. [2024-11-09 10:55:57,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197124 conditions, 74019 events. 49481/74019 cut-off events. For 75341/79328 co-relation queries the response was YES. Maximal size of possible extension queue 2575. Compared 554074 event pairs, 3849 based on Foata normal form. 990/69958 useless extension candidates. Maximal degree in co-relation 171733. Up to 9030 conditions per place. [2024-11-09 10:55:57,839 INFO L140 encePairwiseOnDemand]: 49/67 looper letters, 452 selfloop transitions, 147 changer transitions 281/898 dead transitions. [2024-11-09 10:55:57,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 898 transitions, 5609 flow [2024-11-09 10:55:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 10:55:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-09 10:55:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1955 transitions. [2024-11-09 10:55:57,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5210554371002132 [2024-11-09 10:55:57,844 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 348 flow. Second operand 56 states and 1955 transitions. [2024-11-09 10:55:57,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 898 transitions, 5609 flow [2024-11-09 10:55:57,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 898 transitions, 5531 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-09 10:55:57,957 INFO L231 Difference]: Finished difference. Result has 176 places, 221 transitions, 1644 flow [2024-11-09 10:55:57,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1644, PETRI_PLACES=176, PETRI_TRANSITIONS=221} [2024-11-09 10:55:57,958 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 107 predicate places. [2024-11-09 10:55:57,958 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 221 transitions, 1644 flow [2024-11-09 10:55:57,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 23.842105263157894) internal successors, (906), 38 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:57,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:57,960 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:57,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:55:58,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:58,161 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:55:58,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1513282800, now seen corresponding path program 2 times [2024-11-09 10:55:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:58,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720291644] [2024-11-09 10:55:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:59,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720291644] [2024-11-09 10:55:59,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720291644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689098178] [2024-11-09 10:55:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:55:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:59,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:59,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:55:59,687 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:55:59,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:59,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 10:55:59,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:59,699 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 [2024-11-09 10:55:59,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 10:55:59,789 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:55:59,789 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 [2024-11-09 10:55:59,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:55:59,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:56:00,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2024-11-09 10:56:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:00,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:01,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:01,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2024-11-09 10:56:01,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:01,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2024-11-09 10:56:01,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:56:01,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 123 [2024-11-09 10:56:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:56:01,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689098178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:01,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:01,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2024-11-09 10:56:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438571394] [2024-11-09 10:56:01,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:01,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 10:56:01,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 10:56:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1826, Unknown=5, NotChecked=0, Total=2070 [2024-11-09 10:56:06,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:10,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:14,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:19,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:23,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:23,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 67 [2024-11-09 10:56:23,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 221 transitions, 1644 flow. Second operand has 46 states, 46 states have (on average 10.91304347826087) internal successors, (502), 46 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:23,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:23,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 67 [2024-11-09 10:56:23,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:28,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:34,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:38,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:40,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:56:44,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]