./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/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 ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 337bc30baab893db6c1e898eac989d238a0e57740b5469c94ed68dbaffc92f80 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:48:49,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:48:49,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:48:49,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:48:49,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:48:49,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:48:49,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:48:49,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:48:49,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:48:49,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:48:49,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:48:49,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:48:49,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:48:49,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:48:49,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:48:49,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:48:49,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:48:49,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:48:49,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:48:49,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:48:49,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:48:49,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:48:49,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:48:49,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:48:49,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:48:49,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:48:49,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:48:49,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:48:49,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:48:49,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:48:49,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:48:49,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:48:49,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:48:49,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:48:49,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:48:49,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:48:49,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:48:49,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:48:49,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:48:49,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:48:49,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:48:49,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:48:49,585 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:48:49,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:48:49,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:48:49,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:48:49,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:48:49,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:48:49,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:48:49,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:48:49,589 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:48:49,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:48:49,590 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:48:49,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:48:49,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:48:49,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:48:49,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:48:49,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:48:49,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:48:49,591 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:48:49,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:48:49,592 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:48:49,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:48:49,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:48:49,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:48:49,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:48:49,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:48:49,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:48:49,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:48:49,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:48:49,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:48:49,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:48:49,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:48:49,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:48:49,594 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:48:49,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:48:49,595 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:48:49,595 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 337bc30baab893db6c1e898eac989d238a0e57740b5469c94ed68dbaffc92f80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:48:49,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:48:49,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:48:49,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:48:49,962 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:48:49,963 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:48:49,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-30 17:48:51,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:48:51,340 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:48:51,340 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-30 17:48:51,353 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29257598d/b08c2962a968442aba25f528818a93d3/FLAG41b5d0bcf [2023-08-30 17:48:51,368 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29257598d/b08c2962a968442aba25f528818a93d3 [2023-08-30 17:48:51,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:48:51,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:48:51,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:48:51,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:48:51,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:48:51,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fff16ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51, skipping insertion in model container [2023-08-30 17:48:51,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:48:51,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:48:51,698 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i[30176,30189] [2023-08-30 17:48:51,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:48:51,744 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:48:51,780 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i[30176,30189] [2023-08-30 17:48:51,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:48:51,844 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:48:51,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51 WrapperNode [2023-08-30 17:48:51,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:48:51,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:48:51,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:48:51,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:48:51,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,917 INFO L138 Inliner]: procedures = 172, calls = 52, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 220 [2023-08-30 17:48:51,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:48:51,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:48:51,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:48:51,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:48:51,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,943 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:48:51,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:48:51,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:48:51,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:48:51,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (1/1) ... [2023-08-30 17:48:51,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:48:51,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:48:51,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 17:48:52,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 17:48:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:48:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 17:48:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 17:48:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:48:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:48:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:48:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:48:52,020 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 17:48:52,020 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 17:48:52,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:48:52,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:48:52,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:48:52,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:48:52,022 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 17:48:52,196 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:48:52,210 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:48:52,559 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:48:52,567 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:48:52,570 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-30 17:48:52,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:48:52 BoogieIcfgContainer [2023-08-30 17:48:52,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:48:52,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:48:52,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:48:52,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:48:52,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:48:51" (1/3) ... [2023-08-30 17:48:52,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c121d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:48:52, skipping insertion in model container [2023-08-30 17:48:52,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:48:51" (2/3) ... [2023-08-30 17:48:52,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c121d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:48:52, skipping insertion in model container [2023-08-30 17:48:52,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:48:52" (3/3) ... [2023-08-30 17:48:52,582 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_10-ptrmunge_racefree.i [2023-08-30 17:48:52,589 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:48:52,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:48:52,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 17:48:52,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:48:52,710 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:48:52,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 456 flow [2023-08-30 17:48:52,926 INFO L130 PetriNetUnfolder]: 58/382 cut-off events. [2023-08-30 17:48:52,927 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-30 17:48:52,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 382 events. 58/382 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1620 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 203. Up to 8 conditions per place. [2023-08-30 17:48:52,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 217 transitions, 456 flow [2023-08-30 17:48:52,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 217 transitions, 456 flow [2023-08-30 17:48:52,955 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:48:52,975 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 217 transitions, 456 flow [2023-08-30 17:48:52,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 217 transitions, 456 flow [2023-08-30 17:48:52,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 456 flow [2023-08-30 17:48:53,049 INFO L130 PetriNetUnfolder]: 58/382 cut-off events. [2023-08-30 17:48:53,049 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-30 17:48:53,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 382 events. 58/382 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1620 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 203. Up to 8 conditions per place. [2023-08-30 17:48:53,065 INFO L119 LiptonReduction]: Number of co-enabled transitions 18788 [2023-08-30 17:48:57,303 INFO L134 LiptonReduction]: Checked pairs total: 33979 [2023-08-30 17:48:57,303 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-30 17:48:57,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:48:57,318 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@754c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:48:57,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 17:48:57,327 INFO L130 PetriNetUnfolder]: 7/49 cut-off events. [2023-08-30 17:48:57,328 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 17:48:57,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:48:57,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:48:57,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:48:57,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:48:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash -173945030, now seen corresponding path program 1 times [2023-08-30 17:48:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:48:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368996169] [2023-08-30 17:48:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:48:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:48:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:48:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:48:57,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:48:57,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368996169] [2023-08-30 17:48:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368996169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:48:57,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:48:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 17:48:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26068701] [2023-08-30 17:48:57,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:48:57,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 17:48:57,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:48:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 17:48:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 17:48:58,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 381 [2023-08-30 17:48:58,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 79 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 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) [2023-08-30 17:48:58,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:48:58,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 381 [2023-08-30 17:48:58,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:48:58,907 INFO L130 PetriNetUnfolder]: 4160/7183 cut-off events. [2023-08-30 17:48:58,907 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2023-08-30 17:48:58,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13834 conditions, 7183 events. 4160/7183 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 48726 event pairs, 2761 based on Foata normal form. 1019/6668 useless extension candidates. Maximal degree in co-relation 12598. Up to 5191 conditions per place. [2023-08-30 17:48:58,935 INFO L137 encePairwiseOnDemand]: 351/381 looper letters, 74 selfloop transitions, 8 changer transitions 42/137 dead transitions. [2023-08-30 17:48:58,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 137 transitions, 565 flow [2023-08-30 17:48:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:48:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:48:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1366 transitions. [2023-08-30 17:48:58,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121859767529059 [2023-08-30 17:48:58,952 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1366 transitions. [2023-08-30 17:48:58,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1366 transitions. [2023-08-30 17:48:58,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:48:58,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1366 transitions. [2023-08-30 17:48:58,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 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) [2023-08-30 17:48:58,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 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) [2023-08-30 17:48:58,983 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 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) [2023-08-30 17:48:58,985 INFO L175 Difference]: Start difference. First operand has 58 places, 79 transitions, 180 flow. Second operand 7 states and 1366 transitions. [2023-08-30 17:48:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 137 transitions, 565 flow [2023-08-30 17:48:58,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 137 transitions, 565 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:48:58,993 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 216 flow [2023-08-30 17:48:58,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2023-08-30 17:48:58,998 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2023-08-30 17:48:58,998 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 216 flow [2023-08-30 17:48:58,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 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) [2023-08-30 17:48:58,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:48:58,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:48:58,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:48:59,000 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:48:59,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:48:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1709411710, now seen corresponding path program 1 times [2023-08-30 17:48:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:48:59,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704063538] [2023-08-30 17:48:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:48:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:48:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:48:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:48:59,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:48:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704063538] [2023-08-30 17:48:59,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704063538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:48:59,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:48:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:48:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381214703] [2023-08-30 17:48:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:48:59,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:48:59,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:48:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:48:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:48:59,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 381 [2023-08-30 17:48:59,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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) [2023-08-30 17:48:59,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:48:59,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 381 [2023-08-30 17:48:59,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:48:59,703 INFO L130 PetriNetUnfolder]: 4062/7153 cut-off events. [2023-08-30 17:48:59,703 INFO L131 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2023-08-30 17:48:59,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16014 conditions, 7153 events. 4062/7153 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 50000 event pairs, 2763 based on Foata normal form. 1/6331 useless extension candidates. Maximal degree in co-relation 15524. Up to 6282 conditions per place. [2023-08-30 17:48:59,754 INFO L137 encePairwiseOnDemand]: 378/381 looper letters, 64 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2023-08-30 17:48:59,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 392 flow [2023-08-30 17:48:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:48:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:48:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-30 17:48:59,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231846019247594 [2023-08-30 17:48:59,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-30 17:48:59,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-30 17:48:59,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:48:59,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-30 17:48:59,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 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) [2023-08-30 17:48:59,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 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) [2023-08-30 17:48:59,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 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) [2023-08-30 17:48:59,763 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 216 flow. Second operand 3 states and 598 transitions. [2023-08-30 17:48:59,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 392 flow [2023-08-30 17:48:59,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 386 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 17:48:59,775 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 218 flow [2023-08-30 17:48:59,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-08-30 17:48:59,776 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2023-08-30 17:48:59,777 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 218 flow [2023-08-30 17:48:59,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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) [2023-08-30 17:48:59,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:48:59,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:48:59,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 17:48:59,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:48:59,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:48:59,781 INFO L85 PathProgramCache]: Analyzing trace with hash 342566962, now seen corresponding path program 1 times [2023-08-30 17:48:59,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:48:59,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639269604] [2023-08-30 17:48:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:48:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:48:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:48:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:00,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:00,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639269604] [2023-08-30 17:49:00,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639269604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:00,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180193240] [2023-08-30 17:49:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:00,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:00,005 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) [2023-08-30 17:49:00,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 17:49:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:00,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 17:49:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:00,185 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 17:49:00,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 17:49:00,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 17:49:00,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 17:49:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:00,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:00,417 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_40 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1_ids~0#1.base| v_ArrVal_40) |c_t1_funThread1of1ForFork1_munge_~v#1.base|) |c_t1_funThread1of1ForFork1_munge_~v#1.offset|) 0)) is different from false [2023-08-30 17:49:00,435 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_40 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1_ids~0#1.base| v_ArrVal_40) |c_~#global1~0.base|) |c_~#global1~0.offset|) 0)) is different from false [2023-08-30 17:49:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 17:49:00,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180193240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:00,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:00,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-30 17:49:00,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310437844] [2023-08-30 17:49:00,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 17:49:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 17:49:00,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=39, Unknown=2, NotChecked=26, Total=90 [2023-08-30 17:49:00,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 381 [2023-08-30 17:49:00,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 144.3) internal successors, (1443), 10 states have internal predecessors, (1443), 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) [2023-08-30 17:49:00,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:00,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 381 [2023-08-30 17:49:00,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:01,322 INFO L130 PetriNetUnfolder]: 4543/7570 cut-off events. [2023-08-30 17:49:01,322 INFO L131 PetriNetUnfolder]: For 2448/2451 co-relation queries the response was YES. [2023-08-30 17:49:01,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 7570 events. 4543/7570 cut-off events. For 2448/2451 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 49227 event pairs, 2537 based on Foata normal form. 2/6691 useless extension candidates. Maximal degree in co-relation 16969. Up to 5756 conditions per place. [2023-08-30 17:49:01,353 INFO L137 encePairwiseOnDemand]: 368/381 looper letters, 76 selfloop transitions, 11 changer transitions 30/127 dead transitions. [2023-08-30 17:49:01,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 626 flow [2023-08-30 17:49:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:49:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:49:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 969 transitions. [2023-08-30 17:49:01,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238845144356955 [2023-08-30 17:49:01,357 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 969 transitions. [2023-08-30 17:49:01,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 969 transitions. [2023-08-30 17:49:01,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:01,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 969 transitions. [2023-08-30 17:49:01,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.5) internal successors, (969), 6 states have internal predecessors, (969), 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) [2023-08-30 17:49:01,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 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) [2023-08-30 17:49:01,365 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 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) [2023-08-30 17:49:01,365 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 218 flow. Second operand 6 states and 969 transitions. [2023-08-30 17:49:01,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 626 flow [2023-08-30 17:49:01,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 616 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:49:01,373 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 270 flow [2023-08-30 17:49:01,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-08-30 17:49:01,374 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-08-30 17:49:01,374 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 270 flow [2023-08-30 17:49:01,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.3) internal successors, (1443), 10 states have internal predecessors, (1443), 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) [2023-08-30 17:49:01,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:01,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:01,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 17:49:01,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:01,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 17:49:01,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash 389992435, now seen corresponding path program 1 times [2023-08-30 17:49:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:01,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665899734] [2023-08-30 17:49:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:01,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:01,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:01,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665899734] [2023-08-30 17:49:01,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665899734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:01,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483639091] [2023-08-30 17:49:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:01,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:01,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:01,633 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) [2023-08-30 17:49:01,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 17:49:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:01,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:01,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:01,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483639091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:01,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:01,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:01,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685901382] [2023-08-30 17:49:01,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:01,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:01,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:01,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 381 [2023-08-30 17:49:01,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 180.57142857142858) internal successors, (1264), 7 states have internal predecessors, (1264), 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) [2023-08-30 17:49:01,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:01,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 381 [2023-08-30 17:49:01,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:01,818 INFO L130 PetriNetUnfolder]: 20/77 cut-off events. [2023-08-30 17:49:01,818 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-30 17:49:01,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 77 events. 20/77 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 192 event pairs, 5 based on Foata normal form. 15/92 useless extension candidates. Maximal degree in co-relation 211. Up to 50 conditions per place. [2023-08-30 17:49:01,819 INFO L137 encePairwiseOnDemand]: 378/381 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2023-08-30 17:49:01,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 199 flow [2023-08-30 17:49:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:49:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:49:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-08-30 17:49:01,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4881889763779528 [2023-08-30 17:49:01,821 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-08-30 17:49:01,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-08-30 17:49:01,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:01,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-08-30 17:49:01,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 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) [2023-08-30 17:49:01,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 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) [2023-08-30 17:49:01,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 381.0) internal successors, (1905), 5 states have internal predecessors, (1905), 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) [2023-08-30 17:49:01,827 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 270 flow. Second operand 4 states and 744 transitions. [2023-08-30 17:49:01,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 199 flow [2023-08-30 17:49:01,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 143 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-30 17:49:01,829 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-30 17:49:01,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-30 17:49:01,830 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -29 predicate places. [2023-08-30 17:49:01,830 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-30 17:49:01,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.57142857142858) internal successors, (1264), 7 states have internal predecessors, (1264), 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) [2023-08-30 17:49:01,833 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 17:49:01,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 17:49:01,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 17:49:01,834 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 17:49:01,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:49:02,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 17:49:02,040 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 17:49:02,042 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:49:02,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 456 flow [2023-08-30 17:49:02,078 INFO L130 PetriNetUnfolder]: 58/382 cut-off events. [2023-08-30 17:49:02,079 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-30 17:49:02,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 382 events. 58/382 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1620 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 203. Up to 8 conditions per place. [2023-08-30 17:49:02,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 217 transitions, 456 flow [2023-08-30 17:49:02,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 217 transitions, 456 flow [2023-08-30 17:49:02,084 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:02,084 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 217 transitions, 456 flow [2023-08-30 17:49:02,085 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 217 transitions, 456 flow [2023-08-30 17:49:02,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 456 flow [2023-08-30 17:49:02,168 INFO L130 PetriNetUnfolder]: 58/382 cut-off events. [2023-08-30 17:49:02,169 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-30 17:49:02,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 382 events. 58/382 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1620 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 203. Up to 8 conditions per place. [2023-08-30 17:49:02,181 INFO L119 LiptonReduction]: Number of co-enabled transitions 18788 [2023-08-30 17:49:06,092 INFO L134 LiptonReduction]: Checked pairs total: 31210 [2023-08-30 17:49:06,093 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-08-30 17:49:06,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:06,101 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@754c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:06,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 17:49:06,105 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-08-30 17:49:06,105 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:06,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:06,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:49:06,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:06,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash 650581034, now seen corresponding path program 1 times [2023-08-30 17:49:06,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341739966] [2023-08-30 17:49:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:06,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:06,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:06,155 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:06,156 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:06,156 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 17:49:06,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 17:49:06,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 17:49:06,159 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:06,159 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 17:49:06,160 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:06,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:49:06,222 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-30 17:49:06,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 345 transitions, 738 flow [2023-08-30 17:49:06,416 INFO L130 PetriNetUnfolder]: 197/1105 cut-off events. [2023-08-30 17:49:06,416 INFO L131 PetriNetUnfolder]: For 72/81 co-relation queries the response was YES. [2023-08-30 17:49:06,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 1105 events. 197/1105 cut-off events. For 72/81 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6613 event pairs, 1 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 673. Up to 32 conditions per place. [2023-08-30 17:49:06,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 345 transitions, 738 flow [2023-08-30 17:49:06,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 345 transitions, 738 flow [2023-08-30 17:49:06,456 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:06,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 345 transitions, 738 flow [2023-08-30 17:49:06,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 345 transitions, 738 flow [2023-08-30 17:49:06,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 345 transitions, 738 flow [2023-08-30 17:49:06,633 INFO L130 PetriNetUnfolder]: 197/1105 cut-off events. [2023-08-30 17:49:06,633 INFO L131 PetriNetUnfolder]: For 72/81 co-relation queries the response was YES. [2023-08-30 17:49:06,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 1105 events. 197/1105 cut-off events. For 72/81 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6613 event pairs, 1 based on Foata normal form. 0/913 useless extension candidates. Maximal degree in co-relation 673. Up to 32 conditions per place. [2023-08-30 17:49:06,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 69784 [2023-08-30 17:49:11,707 INFO L134 LiptonReduction]: Checked pairs total: 148587 [2023-08-30 17:49:11,707 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-08-30 17:49:11,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:11,710 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@754c1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:11,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 17:49:11,716 INFO L130 PetriNetUnfolder]: 7/39 cut-off events. [2023-08-30 17:49:11,716 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:49:11,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:11,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:11,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 17:49:11,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash -528924341, now seen corresponding path program 1 times [2023-08-30 17:49:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:11,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567982722] [2023-08-30 17:49:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:11,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:49:11,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:11,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567982722] [2023-08-30 17:49:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567982722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:11,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:11,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 17:49:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169666340] [2023-08-30 17:49:11,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:11,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 17:49:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 17:49:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 17:49:12,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 596 [2023-08-30 17:49:12,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 145 transitions, 338 flow. Second operand has 6 states, 6 states have (on average 265.1666666666667) internal successors, (1591), 6 states have internal predecessors, (1591), 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) [2023-08-30 17:49:12,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:12,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 596 [2023-08-30 17:49:12,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand