./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-overflow.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 23:47:29,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 23:47:29,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-11 23:47:29,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 23:47:29,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 23:47:29,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 23:47:29,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 23:47:29,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 23:47:29,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 23:47:29,854 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 23:47:29,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 23:47:29,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 23:47:29,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 23:47:29,855 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 23:47:29,856 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 23:47:29,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 23:47:29,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 23:47:29,856 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 23:47:29,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 23:47:29,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 23:47:29,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 23:47:29,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 23:47:29,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 23:47:29,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 23:47:29,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 23:47:29,862 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-11 23:47:29,863 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 23:47:29,863 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 23:47:29,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 23:47:29,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 23:47:29,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 23:47:29,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 23:47:29,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 23:47:29,864 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 23:47:29,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 23:47:29,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 23:47:29,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 23:47:29,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 23:47:29,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 23:47:29,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 23:47:29,870 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 23:47:29,871 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 23:47:29,871 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 23:47:29,871 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 23:47:29,872 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2024-10-11 23:47:30,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 23:47:30,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 23:47:30,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 23:47:30,250 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 23:47:30,251 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 23:47:30,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2024-10-11 23:47:31,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 23:47:32,061 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 23:47:32,062 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2024-10-11 23:47:32,085 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/fb655c6ea/14659cb39bdf40178dcdd229f9cc529a/FLAGdb7817bec [2024-10-11 23:47:32,098 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/fb655c6ea/14659cb39bdf40178dcdd229f9cc529a [2024-10-11 23:47:32,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 23:47:32,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 23:47:32,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 23:47:32,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 23:47:32,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 23:47:32,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:32,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef48f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32, skipping insertion in model container [2024-10-11 23:47:32,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:32,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 23:47:32,840 WARN L1659 CHandler]: Possible shadowing of function lock [2024-10-11 23:47:32,841 WARN L1659 CHandler]: Possible shadowing of function lock [2024-10-11 23:47:32,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 23:47:32,851 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 23:47:32,918 WARN L1659 CHandler]: Possible shadowing of function lock [2024-10-11 23:47:32,921 WARN L1659 CHandler]: Possible shadowing of function lock [2024-10-11 23:47:32,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 23:47:32,999 INFO L204 MainTranslator]: Completed translation [2024-10-11 23:47:33,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32 WrapperNode [2024-10-11 23:47:33,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 23:47:33,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 23:47:33,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 23:47:33,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 23:47:33,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,062 INFO L138 Inliner]: procedures = 373, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 183 [2024-10-11 23:47:33,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 23:47:33,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 23:47:33,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 23:47:33,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 23:47:33,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,076 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,098 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-11 23:47:33,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,116 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,120 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 23:47:33,121 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 23:47:33,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 23:47:33,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 23:47:33,125 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (1/1) ... [2024-10-11 23:47:33,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 23:47:33,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 23:47:33,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 23:47:33,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 23:47:33,243 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2024-10-11 23:47:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2024-10-11 23:47:33,246 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2024-10-11 23:47:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2024-10-11 23:47:33,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 23:47:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 23:47:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 23:47:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 23:47:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 23:47:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 23:47:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 23:47:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 23:47:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 23:47:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 23:47:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 23:47:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 23:47:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 23:47:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 23:47:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 23:47:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 23:47:33,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 23:47:33,255 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 23:47:33,475 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 23:47:33,478 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 23:47:33,832 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 23:47:33,833 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 23:47:34,081 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 23:47:34,082 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 23:47:34,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 11:47:34 BoogieIcfgContainer [2024-10-11 23:47:34,083 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 23:47:34,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 23:47:34,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 23:47:34,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 23:47:34,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 11:47:32" (1/3) ... [2024-10-11 23:47:34,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238c074d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 11:47:34, skipping insertion in model container [2024-10-11 23:47:34,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 11:47:32" (2/3) ... [2024-10-11 23:47:34,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238c074d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 11:47:34, skipping insertion in model container [2024-10-11 23:47:34,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 11:47:34" (3/3) ... [2024-10-11 23:47:34,090 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2024-10-11 23:47:34,103 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 23:47:34,104 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-11 23:47:34,104 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 23:47:34,159 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 23:47:34,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 72 transitions, 164 flow [2024-10-11 23:47:34,295 INFO L124 PetriNetUnfolderBase]: 10/141 cut-off events. [2024-10-11 23:47:34,296 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 23:47:34,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 141 events. 10/141 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 580 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 77. Up to 7 conditions per place. [2024-10-11 23:47:34,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 72 transitions, 164 flow [2024-10-11 23:47:34,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 72 transitions, 164 flow [2024-10-11 23:47:34,315 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 23:47:34,322 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=LoopHeads, 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;@9cf7976, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 23:47:34,322 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-11 23:47:34,327 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 23:47:34,329 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-10-11 23:47:34,329 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 23:47:34,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 23:47:34,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 23:47:34,331 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-11 23:47:34,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 23:47:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash 531407448, now seen corresponding path program 1 times [2024-10-11 23:47:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 23:47:34,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251379692] [2024-10-11 23:47:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 23:47:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 23:47:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 23:47:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 23:47:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 23:47:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251379692] [2024-10-11 23:47:34,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251379692] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 23:47:34,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 23:47:34,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 23:47:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473224649] [2024-10-11 23:47:34,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 23:47:34,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 23:47:34,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 23:47:34,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 23:47:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 23:47:34,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-10-11 23:47:34,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 164 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) [2024-10-11 23:47:34,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 23:47:34,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-10-11 23:47:34,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 23:47:35,567 INFO L124 PetriNetUnfolderBase]: 2384/4943 cut-off events. [2024-10-11 23:47:35,568 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-10-11 23:47:35,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8922 conditions, 4943 events. 2384/4943 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 35607 event pairs, 1413 based on Foata normal form. 12/4230 useless extension candidates. Maximal degree in co-relation 7989. Up to 2508 conditions per place. [2024-10-11 23:47:35,611 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 80 selfloop transitions, 9 changer transitions 2/117 dead transitions. [2024-10-11 23:47:35,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 448 flow [2024-10-11 23:47:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 23:47:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 23:47:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-10-11 23:47:35,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-10-11 23:47:35,630 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 164 flow. Second operand 4 states and 196 transitions. [2024-10-11 23:47:35,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 448 flow [2024-10-11 23:47:35,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 117 transitions, 448 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 23:47:35,645 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 208 flow [2024-10-11 23:47:35,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-10-11 23:47:35,651 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-10-11 23:47:35,652 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 208 flow [2024-10-11 23:47:35,652 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) [2024-10-11 23:47:35,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 23:47:35,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 23:47:35,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 23:47:35,653 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-11 23:47:35,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 23:47:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash -706237748, now seen corresponding path program 1 times [2024-10-11 23:47:35,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 23:47:35,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336811597] [2024-10-11 23:47:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 23:47:35,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 23:47:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 23:47:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 23:47:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 23:47:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336811597] [2024-10-11 23:47:35,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336811597] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 23:47:35,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 23:47:35,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 23:47:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610151478] [2024-10-11 23:47:35,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 23:47:35,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 23:47:35,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 23:47:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 23:47:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 23:47:35,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-10-11 23:47:35,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 208 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) [2024-10-11 23:47:35,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 23:47:35,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-10-11 23:47:35,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 23:47:36,456 INFO L124 PetriNetUnfolderBase]: 2371/4916 cut-off events. [2024-10-11 23:47:36,457 INFO L125 PetriNetUnfolderBase]: For 1243/1243 co-relation queries the response was YES. [2024-10-11 23:47:36,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10033 conditions, 4916 events. 2371/4916 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 35449 event pairs, 1391 based on Foata normal form. 12/4692 useless extension candidates. Maximal degree in co-relation 8939. Up to 2462 conditions per place. [2024-10-11 23:47:36,488 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 80 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2024-10-11 23:47:36,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 484 flow [2024-10-11 23:47:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 23:47:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 23:47:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-10-11 23:47:36,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-10-11 23:47:36,492 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 208 flow. Second operand 4 states and 195 transitions. [2024-10-11 23:47:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 484 flow [2024-10-11 23:47:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 23:47:36,502 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 237 flow [2024-10-11 23:47:36,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-10-11 23:47:36,504 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2024-10-11 23:47:36,505 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 237 flow [2024-10-11 23:47:36,505 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) [2024-10-11 23:47:36,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 23:47:36,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 23:47:36,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 23:47:36,507 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-11 23:47:36,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 23:47:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash -707297101, now seen corresponding path program 1 times [2024-10-11 23:47:36,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 23:47:36,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934430155] [2024-10-11 23:47:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 23:47:36,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 23:47:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 23:47:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 23:47:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 23:47:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934430155] [2024-10-11 23:47:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934430155] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 23:47:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 23:47:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 23:47:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324270421] [2024-10-11 23:47:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 23:47:36,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 23:47:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 23:47:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 23:47:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 23:47:36,625 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-10-11 23:47:36,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 237 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) [2024-10-11 23:47:36,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 23:47:36,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-10-11 23:47:36,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 23:47:37,203 INFO L124 PetriNetUnfolderBase]: 2371/4885 cut-off events. [2024-10-11 23:47:37,203 INFO L125 PetriNetUnfolderBase]: For 3451/3451 co-relation queries the response was YES. [2024-10-11 23:47:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10667 conditions, 4885 events. 2371/4885 cut-off events. For 3451/3451 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 35099 event pairs, 998 based on Foata normal form. 260/4935 useless extension candidates. Maximal degree in co-relation 9486. Up to 2115 conditions per place. [2024-10-11 23:47:37,287 INFO L140 encePairwiseOnDemand]: 60/72 looper letters, 90 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2024-10-11 23:47:37,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 124 transitions, 549 flow [2024-10-11 23:47:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 23:47:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 23:47:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 206 transitions. [2024-10-11 23:47:37,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7152777777777778 [2024-10-11 23:47:37,290 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 237 flow. Second operand 4 states and 206 transitions. [2024-10-11 23:47:37,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 124 transitions, 549 flow [2024-10-11 23:47:37,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 124 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 23:47:37,312 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 242 flow [2024-10-11 23:47:37,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-10-11 23:47:37,313 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2024-10-11 23:47:37,314 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 242 flow [2024-10-11 23:47:37,314 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) [2024-10-11 23:47:37,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 23:47:37,315 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 23:47:37,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 23:47:37,315 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2024-10-11 23:47:37,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 23:47:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash -89624422, now seen corresponding path program 1 times [2024-10-11 23:47:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 23:47:37,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775835805] [2024-10-11 23:47:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 23:47:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 23:47:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 23:47:37,370 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 23:47:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 23:47:37,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 23:47:37,426 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 23:47:37,427 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2024-10-11 23:47:37,429 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2024-10-11 23:47:37,429 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2024-10-11 23:47:37,430 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2024-10-11 23:47:37,430 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2024-10-11 23:47:37,431 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2024-10-11 23:47:37,431 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2024-10-11 23:47:37,432 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2024-10-11 23:47:37,432 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2024-10-11 23:47:37,432 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 18 remaining) [2024-10-11 23:47:37,433 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 18 remaining) [2024-10-11 23:47:37,433 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2024-10-11 23:47:37,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2024-10-11 23:47:37,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2024-10-11 23:47:37,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2024-10-11 23:47:37,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2024-10-11 23:47:37,436 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2024-10-11 23:47:37,436 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2024-10-11 23:47:37,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 23:47:37,437 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 23:47:37,440 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 23:47:37,441 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 23:47:37,485 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-11 23:47:37,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 113 transitions, 270 flow [2024-10-11 23:47:37,545 INFO L124 PetriNetUnfolderBase]: 63/497 cut-off events. [2024-10-11 23:47:37,545 INFO L125 PetriNetUnfolderBase]: For 72/84 co-relation queries the response was YES. [2024-10-11 23:47:37,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 497 events. 63/497 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3124 event pairs, 2 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 306. Up to 32 conditions per place. [2024-10-11 23:47:37,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 113 transitions, 270 flow [2024-10-11 23:47:37,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 113 transitions, 270 flow [2024-10-11 23:47:37,554 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 23:47:37,555 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=LoopHeads, 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;@9cf7976, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 23:47:37,555 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-10-11 23:47:37,559 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 23:47:37,559 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2024-10-11 23:47:37,559 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 23:47:37,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 23:47:37,560 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 23:47:37,560 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [funcAErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, funcAErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2024-10-11 23:47:37,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 23:47:37,561 INFO L85 PathProgramCache]: Analyzing trace with hash 637368938, now seen corresponding path program 1 times [2024-10-11 23:47:37,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 23:47:37,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001311034] [2024-10-11 23:47:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 23:47:37,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 23:47:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 23:47:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 23:47:37,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 23:47:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001311034] [2024-10-11 23:47:37,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001311034] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 23:47:37,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 23:47:37,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 23:47:37,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816853131] [2024-10-11 23:47:37,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 23:47:37,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 23:47:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 23:47:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 23:47:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 23:47:37,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 113 [2024-10-11 23:47:37,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 113 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 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) [2024-10-11 23:47:37,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 23:47:37,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 113 [2024-10-11 23:47:37,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand