./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 3289d67d 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/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 07:55:53,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 07:55:53,831 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-17 07:55:53,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 07:55:53,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 07:55:53,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 07:55:53,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 07:55:53,864 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 07:55:53,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 07:55:53,865 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 07:55:53,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 07:55:53,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 07:55:53,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 07:55:53,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 07:55:53,867 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 07:55:53,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 07:55:53,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-17 07:55:53,868 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 07:55:53,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 07:55:53,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 07:55:53,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 07:55:53,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-17 07:55:53,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 07:55:53,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-17 07:55:53,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 07:55:53,870 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-17 07:55:53,870 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 07:55:53,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 07:55:53,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-17 07:55:53,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 07:55:53,871 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 07:55:53,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 07:55:53,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 07:55:53,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 07:55:53,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:55:53,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 07:55:53,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 07:55:53,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-17 07:55:53,877 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 07:55:53,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 07:55:53,878 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 07:55:53,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 07:55:53,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 07:55:53,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 07:55:53,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 [2024-11-17 07:55:54,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 07:55:54,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 07:55:54,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 07:55:54,133 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 07:55:54,133 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 07:55:54,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2024-11-17 07:55:55,491 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 07:55:55,650 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 07:55:55,650 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2024-11-17 07:55:55,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df4cb997/fb13e906136a46ee904652c140eb1153/FLAG5d7773dda [2024-11-17 07:55:56,055 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df4cb997/fb13e906136a46ee904652c140eb1153 [2024-11-17 07:55:56,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 07:55:56,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 07:55:56,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 07:55:56,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 07:55:56,067 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 07:55:56,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b21848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56, skipping insertion in model container [2024-11-17 07:55:56,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,096 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 07:55:56,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:55:56,332 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 07:55:56,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:55:56,373 INFO L204 MainTranslator]: Completed translation [2024-11-17 07:55:56,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56 WrapperNode [2024-11-17 07:55:56,373 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 07:55:56,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 07:55:56,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 07:55:56,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 07:55:56,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,387 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,414 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 334 [2024-11-17 07:55:56,414 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 07:55:56,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 07:55:56,415 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 07:55:56,415 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 07:55:56,430 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,440 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,460 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]. [2024-11-17 07:55:56,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,461 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,471 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 07:55:56,483 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 07:55:56,483 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 07:55:56,483 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 07:55:56,484 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (1/1) ... [2024-11-17 07:55:56,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:55:56,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:56,519 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) [2024-11-17 07:55:56,521 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 [2024-11-17 07:55:56,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 07:55:56,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 07:55:56,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 07:55:56,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 07:55:56,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 07:55:56,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 07:55:56,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 07:55:56,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 07:55:56,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 07:55:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 07:55:56,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 07:55:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 07:55:56,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 07:55:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 07:55:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 07:55:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 07:55:56,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 07:55:56,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 07:55:56,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 07:55:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 07:55:56,570 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 07:55:56,683 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 07:55:56,685 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 07:55:57,252 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 07:55:57,252 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 07:55:57,618 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 07:55:57,618 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 07:55:57,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:55:57 BoogieIcfgContainer [2024-11-17 07:55:57,619 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 07:55:57,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 07:55:57,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 07:55:57,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 07:55:57,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 07:55:56" (1/3) ... [2024-11-17 07:55:57,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3f880d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:55:57, skipping insertion in model container [2024-11-17 07:55:57,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:55:56" (2/3) ... [2024-11-17 07:55:57,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3f880d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:55:57, skipping insertion in model container [2024-11-17 07:55:57,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:55:57" (3/3) ... [2024-11-17 07:55:57,629 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2024-11-17 07:55:57,648 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 07:55:57,648 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2024-11-17 07:55:57,648 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 07:55:57,758 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 07:55:57,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 98 transitions, 224 flow [2024-11-17 07:55:57,832 INFO L124 PetriNetUnfolderBase]: 12/94 cut-off events. [2024-11-17 07:55:57,832 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 07:55:57,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 12/94 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 310 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2024-11-17 07:55:57,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 98 transitions, 224 flow [2024-11-17 07:55:57,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 205 flow [2024-11-17 07:55:57,849 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 07:55:57,854 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;@315b2b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 07:55:57,854 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-17 07:55:57,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 07:55:57,857 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-17 07:55:57,857 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 07:55:57,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:57,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 07:55:57,858 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:55:57,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash 29059685, now seen corresponding path program 1 times [2024-11-17 07:55:57,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:57,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732142311] [2024-11-17 07:55:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:57,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:58,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:58,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732142311] [2024-11-17 07:55:58,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732142311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:55:58,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:55:58,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:55:58,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619858313] [2024-11-17 07:55:58,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:55:58,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:55:58,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:58,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:55:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:55:58,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 98 [2024-11-17 07:55:58,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-11-17 07:55:58,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:58,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 98 [2024-11-17 07:55:58,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:04,452 INFO L124 PetriNetUnfolderBase]: 41752/56628 cut-off events. [2024-11-17 07:56:04,452 INFO L125 PetriNetUnfolderBase]: For 819/819 co-relation queries the response was YES. [2024-11-17 07:56:04,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112793 conditions, 56628 events. 41752/56628 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 4481. Compared 417676 event pairs, 36178 based on Foata normal form. 5576/35414 useless extension candidates. Maximal degree in co-relation 105564. Up to 54060 conditions per place. [2024-11-17 07:56:05,018 INFO L140 encePairwiseOnDemand]: 73/98 looper letters, 55 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-17 07:56:05,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 313 flow [2024-11-17 07:56:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:56:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:56:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 186 transitions. [2024-11-17 07:56:05,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4744897959183674 [2024-11-17 07:56:05,037 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 205 flow. Second operand 4 states and 186 transitions. [2024-11-17 07:56:05,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 313 flow [2024-11-17 07:56:05,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 300 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 07:56:05,138 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 224 flow [2024-11-17 07:56:05,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2024-11-17 07:56:05,145 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -9 predicate places. [2024-11-17 07:56:05,145 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 224 flow [2024-11-17 07:56:05,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2024-11-17 07:56:05,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:05,146 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-17 07:56:05,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 07:56:05,147 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:56:05,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1995618308, now seen corresponding path program 1 times [2024-11-17 07:56:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:05,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991720996] [2024-11-17 07:56:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:05,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:05,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991720996] [2024-11-17 07:56:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991720996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:56:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178368499] [2024-11-17 07:56:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:05,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:56:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:56:05,270 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) [2024-11-17 07:56:05,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 07:56:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:05,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 07:56:05,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:56:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:05,413 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 07:56:05,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178368499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:56:05,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 07:56:05,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-17 07:56:05,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937310339] [2024-11-17 07:56:05,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:56:05,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 07:56:05,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:05,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 07:56:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-17 07:56:05,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 98 [2024-11-17 07:56:05,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:05,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:05,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 98 [2024-11-17 07:56:05,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:11,230 INFO L124 PetriNetUnfolderBase]: 41752/56626 cut-off events. [2024-11-17 07:56:11,230 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-17 07:56:11,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111920 conditions, 56626 events. 41752/56626 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4474. Compared 417952 event pairs, 36178 based on Foata normal form. 2/29838 useless extension candidates. Maximal degree in co-relation 111866. Up to 54050 conditions per place. [2024-11-17 07:56:11,575 INFO L140 encePairwiseOnDemand]: 89/98 looper letters, 48 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-11-17 07:56:11,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 82 transitions, 336 flow [2024-11-17 07:56:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 07:56:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 07:56:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 218 transitions. [2024-11-17 07:56:11,581 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-11-17 07:56:11,581 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 224 flow. Second operand 6 states and 218 transitions. [2024-11-17 07:56:11,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 82 transitions, 336 flow [2024-11-17 07:56:11,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 07:56:11,586 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 240 flow [2024-11-17 07:56:11,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-11-17 07:56:11,588 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -6 predicate places. [2024-11-17 07:56:11,589 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 240 flow [2024-11-17 07:56:11,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:11,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:11,589 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-17 07:56:11,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 07:56:11,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:56:11,796 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:56:11,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1734624572, now seen corresponding path program 1 times [2024-11-17 07:56:11,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:11,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030250928] [2024-11-17 07:56:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:11,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:11,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:11,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030250928] [2024-11-17 07:56:11,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030250928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:56:11,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968866217] [2024-11-17 07:56:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:11,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:56:11,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:56:11,891 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) [2024-11-17 07:56:11,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 07:56:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:11,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 07:56:11,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:56:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:12,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:56:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:12,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968866217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:56:12,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:56:12,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-17 07:56:12,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964586469] [2024-11-17 07:56:12,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:56:12,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 07:56:12,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 07:56:12,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-17 07:56:12,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 98 [2024-11-17 07:56:12,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 240 flow. Second operand has 12 states, 12 states have (on average 27.083333333333332) internal successors, (325), 12 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:12,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:12,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 98 [2024-11-17 07:56:12,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:17,506 INFO L124 PetriNetUnfolderBase]: 41758/56662 cut-off events. [2024-11-17 07:56:17,506 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-11-17 07:56:17,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112026 conditions, 56662 events. 41758/56662 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 4474. Compared 417772 event pairs, 36178 based on Foata normal form. 6/29880 useless extension candidates. Maximal degree in co-relation 111868. Up to 54061 conditions per place. [2024-11-17 07:56:17,822 INFO L140 encePairwiseOnDemand]: 89/98 looper letters, 53 selfloop transitions, 25 changer transitions 0/100 dead transitions. [2024-11-17 07:56:17,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 100 transitions, 510 flow [2024-11-17 07:56:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 07:56:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 07:56:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 344 transitions. [2024-11-17 07:56:17,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3510204081632653 [2024-11-17 07:56:17,824 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 240 flow. Second operand 10 states and 344 transitions. [2024-11-17 07:56:17,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 100 transitions, 510 flow [2024-11-17 07:56:17,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 452 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-17 07:56:17,827 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 380 flow [2024-11-17 07:56:17,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=380, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2024-11-17 07:56:17,827 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2024-11-17 07:56:17,828 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 380 flow [2024-11-17 07:56:17,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.083333333333332) internal successors, (325), 12 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:17,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:17,828 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:56:17,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 07:56:18,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-17 07:56:18,029 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:56:18,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash -145080878, now seen corresponding path program 1 times [2024-11-17 07:56:18,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:18,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874221486] [2024-11-17 07:56:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:18,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:18,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874221486] [2024-11-17 07:56:18,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874221486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:56:18,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:56:18,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:56:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969041904] [2024-11-17 07:56:18,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:56:18,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:56:18,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:18,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:56:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:56:18,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 98 [2024-11-17 07:56:18,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 07:56:18,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:18,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 98 [2024-11-17 07:56:18,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:23,668 INFO L124 PetriNetUnfolderBase]: 47068/64406 cut-off events. [2024-11-17 07:56:23,669 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-17 07:56:23,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127306 conditions, 64406 events. 47068/64406 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 4684. Compared 484572 event pairs, 41078 based on Foata normal form. 1134/36630 useless extension candidates. Maximal degree in co-relation 127201. Up to 54085 conditions per place. [2024-11-17 07:56:24,061 INFO L140 encePairwiseOnDemand]: 83/98 looper letters, 124 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2024-11-17 07:56:24,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 151 transitions, 821 flow [2024-11-17 07:56:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 07:56:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 07:56:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2024-11-17 07:56:24,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5081632653061224 [2024-11-17 07:56:24,063 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 380 flow. Second operand 5 states and 249 transitions. [2024-11-17 07:56:24,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 151 transitions, 821 flow [2024-11-17 07:56:24,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 151 transitions, 787 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-17 07:56:24,066 INFO L231 Difference]: Finished difference. Result has 99 places, 103 transitions, 414 flow [2024-11-17 07:56:24,067 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=414, PETRI_PLACES=99, PETRI_TRANSITIONS=103} [2024-11-17 07:56:24,067 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 6 predicate places. [2024-11-17 07:56:24,067 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 103 transitions, 414 flow [2024-11-17 07:56:24,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2024-11-17 07:56:24,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:24,068 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:56:24,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 07:56:24,068 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:56:24,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -421979984, now seen corresponding path program 1 times [2024-11-17 07:56:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930682131] [2024-11-17 07:56:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:24,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:24,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930682131] [2024-11-17 07:56:24,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930682131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:56:24,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:56:24,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 07:56:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500497621] [2024-11-17 07:56:24,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:56:24,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:56:24,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:56:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:56:24,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 98 [2024-11-17 07:56:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 103 transitions, 414 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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) [2024-11-17 07:56:24,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:24,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 98 [2024-11-17 07:56:24,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand