./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-commit-2.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-commit-2.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 ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 07:54:46,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 07:54:46,906 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-17 07:54:46,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 07:54:46,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 07:54:46,945 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 07:54:46,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 07:54:46,946 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 07:54:46,946 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 07:54:46,947 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 07:54:46,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 07:54:46,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 07:54:46,949 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 07:54:46,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 07:54:46,951 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 07:54:46,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 07:54:46,952 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-17 07:54:46,952 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 07:54:46,952 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 07:54:46,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 07:54:46,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 07:54:46,953 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-17 07:54:46,954 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 07:54:46,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-17 07:54:46,954 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 07:54:46,954 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-17 07:54:46,955 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 07:54:46,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 07:54:46,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-17 07:54:46,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 07:54:46,959 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 07:54:46,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 07:54:46,959 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 07:54:46,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 07:54:46,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:54:46,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 07:54:46,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 07:54:46,961 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-17 07:54:46,961 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 07:54:46,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 07:54:46,961 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 07:54:46,965 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 07:54:46,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 07:54:46,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 07:54:46,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 [2024-11-17 07:54:47,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 07:54:47,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 07:54:47,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 07:54:47,290 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 07:54:47,291 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 07:54:47,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2024-11-17 07:54:48,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 07:54:48,881 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 07:54:48,883 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2024-11-17 07:54:48,895 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4dc8fdd/816b4a1efb274ee99d61df7a55b7cb1c/FLAG927c7f2cc [2024-11-17 07:54:49,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce4dc8fdd/816b4a1efb274ee99d61df7a55b7cb1c [2024-11-17 07:54:49,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 07:54:49,276 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 07:54:49,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 07:54:49,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 07:54:49,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 07:54:49,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12945fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49, skipping insertion in model container [2024-11-17 07:54:49,284 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 07:54:49,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:54:49,569 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 07:54:49,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:54:49,633 INFO L204 MainTranslator]: Completed translation [2024-11-17 07:54:49,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49 WrapperNode [2024-11-17 07:54:49,634 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 07:54:49,635 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 07:54:49,635 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 07:54:49,635 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 07:54:49,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,692 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 487 [2024-11-17 07:54:49,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 07:54:49,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 07:54:49,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 07:54:49,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 07:54:49,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,712 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,739 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-17 07:54:49,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,758 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,760 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,762 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 07:54:49,775 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 07:54:49,775 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 07:54:49,775 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 07:54:49,776 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (1/1) ... [2024-11-17 07:54:49,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:54:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:49,810 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 07:54:49,814 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 07:54:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 07:54:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 07:54:49,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 07:54:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 07:54:49,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 07:54:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 07:54:49,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 07:54:49,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 07:54:49,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 07:54:49,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 07:54:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 07:54:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 07:54:49,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 07:54:49,867 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 07:54:50,000 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 07:54:50,001 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 07:54:50,619 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 07:54:50,619 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 07:54:51,242 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 07:54:51,243 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 07:54:51,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:54:51 BoogieIcfgContainer [2024-11-17 07:54:51,244 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 07:54:51,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 07:54:51,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 07:54:51,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 07:54:51,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 07:54:49" (1/3) ... [2024-11-17 07:54:51,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff8620c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:54:51, skipping insertion in model container [2024-11-17 07:54:51,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:49" (2/3) ... [2024-11-17 07:54:51,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff8620c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:54:51, skipping insertion in model container [2024-11-17 07:54:51,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:54:51" (3/3) ... [2024-11-17 07:54:51,255 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2024-11-17 07:54:51,275 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 07:54:51,276 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-17 07:54:51,276 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 07:54:51,417 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 07:54:51,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 114 transitions, 256 flow [2024-11-17 07:54:51,507 INFO L124 PetriNetUnfolderBase]: 16/110 cut-off events. [2024-11-17 07:54:51,508 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 07:54:51,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 110 events. 16/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 340 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 97. Up to 2 conditions per place. [2024-11-17 07:54:51,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 114 transitions, 256 flow [2024-11-17 07:54:51,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 108 transitions, 237 flow [2024-11-17 07:54:51,529 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 07:54:51,538 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;@86f3425, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 07:54:51,538 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-17 07:54:51,542 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 07:54:51,542 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-17 07:54:51,543 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 07:54:51,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:51,543 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 07:54:51,544 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err11ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err10ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:54:51,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 40896976, now seen corresponding path program 1 times [2024-11-17 07:54:51,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:51,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873131190] [2024-11-17 07:54:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:51,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:51,850 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 07:54:51,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:51,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873131190] [2024-11-17 07:54:51,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873131190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:51,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:51,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:54:51,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891782978] [2024-11-17 07:54:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:51,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:54:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:54:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:54:51,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 114 [2024-11-17 07:54:51,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:51,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:51,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 114 [2024-11-17 07:54:51,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:04,458 INFO L124 PetriNetUnfolderBase]: 97236/125960 cut-off events. [2024-11-17 07:55:04,459 INFO L125 PetriNetUnfolderBase]: For 3598/3598 co-relation queries the response was YES. [2024-11-17 07:55:04,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255658 conditions, 125960 events. 97236/125960 cut-off events. For 3598/3598 co-relation queries the response was YES. Maximal size of possible extension queue 3910. Compared 732135 event pairs, 86422 based on Foata normal form. 8/86955 useless extension candidates. Maximal degree in co-relation 248429. Up to 125762 conditions per place. [2024-11-17 07:55:05,255 INFO L140 encePairwiseOnDemand]: 80/114 looper letters, 58 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-11-17 07:55:05,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 84 transitions, 325 flow [2024-11-17 07:55:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:55:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:55:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-11-17 07:55:05,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37719298245614036 [2024-11-17 07:55:05,273 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 237 flow. Second operand 4 states and 172 transitions. [2024-11-17 07:55:05,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 84 transitions, 325 flow [2024-11-17 07:55:05,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 312 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 07:55:05,341 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 196 flow [2024-11-17 07:55:05,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-11-17 07:55:05,346 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -20 predicate places. [2024-11-17 07:55:05,347 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 196 flow [2024-11-17 07:55:05,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:05,347 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:05,347 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-17 07:55:05,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 07:55:05,348 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err11ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err10ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:55:05,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:05,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1267807491, now seen corresponding path program 1 times [2024-11-17 07:55:05,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:05,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723650514] [2024-11-17 07:55:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:05,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:05,476 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 07:55:05,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723650514] [2024-11-17 07:55:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723650514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:55:05,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:55:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:55:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218865851] [2024-11-17 07:55:05,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:55:05,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:55:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:05,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:55:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:55:05,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 114 [2024-11-17 07:55:05,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:05,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:05,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 114 [2024-11-17 07:55:05,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:14,838 INFO L124 PetriNetUnfolderBase]: 97240/125984 cut-off events. [2024-11-17 07:55:14,838 INFO L125 PetriNetUnfolderBase]: For 675/675 co-relation queries the response was YES. [2024-11-17 07:55:15,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254720 conditions, 125984 events. 97240/125984 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 3910. Compared 732160 event pairs, 86422 based on Foata normal form. 4/86979 useless extension candidates. Maximal degree in co-relation 254616. Up to 125779 conditions per place. [2024-11-17 07:55:15,535 INFO L140 encePairwiseOnDemand]: 97/114 looper letters, 67 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2024-11-17 07:55:15,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 96 transitions, 398 flow [2024-11-17 07:55:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:55:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:55:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-11-17 07:55:15,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35964912280701755 [2024-11-17 07:55:15,542 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 196 flow. Second operand 4 states and 164 transitions. [2024-11-17 07:55:15,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 96 transitions, 398 flow [2024-11-17 07:55:15,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 07:55:15,550 INFO L231 Difference]: Finished difference. Result has 88 places, 96 transitions, 284 flow [2024-11-17 07:55:15,551 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=88, PETRI_TRANSITIONS=96} [2024-11-17 07:55:15,554 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -17 predicate places. [2024-11-17 07:55:15,554 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 96 transitions, 284 flow [2024-11-17 07:55:15,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:15,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:15,555 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-17 07:55:15,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 07:55:15,555 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err11ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err10ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-17 07:55:15,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 141825108, now seen corresponding path program 1 times [2024-11-17 07:55:15,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:15,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983476134] [2024-11-17 07:55:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:15,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:15,687 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 07:55:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983476134] [2024-11-17 07:55:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983476134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539820155] [2024-11-17 07:55:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:15,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:15,692 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 07:55:15,694 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 07:55:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:15,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 07:55:15,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:15,863 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 07:55:15,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:15,914 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 07:55:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539820155] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:15,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-17 07:55:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316093833] [2024-11-17 07:55:15,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:15,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 07:55:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 07:55:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-17 07:55:15,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 114 [2024-11-17 07:55:15,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 96 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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 07:55:15,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:15,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 114 [2024-11-17 07:55:15,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand