./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c --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/weaver/popl20-bad-buffer-mult-alt.wvr.c -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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --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 19:54:23,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:54:23,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:54:23,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:54:23,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:54:23,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:54:23,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:54:23,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:54:23,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:54:23,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:54:23,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:54:23,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:54:23,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:54:23,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:54:23,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:54:23,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:54:23,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:54:23,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:54:23,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:54:23,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:54:23,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:54:23,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:54:23,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:54:23,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:54:23,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:54:23,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:54:23,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:54:23,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:54:23,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:54:23,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:54:23,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:54:23,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:54:23,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:54:23,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:54:23,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:54:23,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:54:23,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:54:23,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:54:23,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:54:23,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:54:23,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:54:23,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:54:23,453 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:54:23,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:54:23,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:54:23,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:54:23,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:54:23,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:54:23,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:54:23,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:54:23,455 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:54:23,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:54:23,455 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:54:23,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:54:23,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:54:23,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:54:23,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:54:23,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:54:23,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:54:23,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:54:23,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:54:23,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:54:23,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:54:23,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:54:23,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:54:23,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:54:23,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:54:23,459 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:54:23,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:54:23,459 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:54:23,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:54:23,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:54:23,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:54:23,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:54:23,768 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:54:23,768 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:54:23,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 19:54:25,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:54:25,254 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:54:25,254 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 19:54:25,260 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e9b02e9/8533204ba3a9457bbf94db96b632d8cb/FLAG3df46fb4e [2023-08-30 19:54:25,271 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46e9b02e9/8533204ba3a9457bbf94db96b632d8cb [2023-08-30 19:54:25,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:54:25,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:54:25,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:54:25,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:54:25,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:54:25,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125c8ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25, skipping insertion in model container [2023-08-30 19:54:25,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:54:25,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:54:25,449 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-30 19:54:25,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:54:25,466 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:54:25,490 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-30 19:54:25,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:54:25,502 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:54:25,502 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:54:25,508 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:54:25,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25 WrapperNode [2023-08-30 19:54:25,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:54:25,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:54:25,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:54:25,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:54:25,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,569 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 330 [2023-08-30 19:54:25,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:54:25,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:54:25,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:54:25,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:54:25,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,627 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:54:25,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:54:25,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:54:25,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:54:25,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (1/1) ... [2023-08-30 19:54:25,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:54:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:54:25,674 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 19:54:25,702 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 19:54:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:54:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:54:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:54:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:54:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:54:25,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:54:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:54:25,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:54:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:54:25,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:54:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 19:54:25,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 19:54:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:54:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:54:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:54:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:54:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:54:25,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:54:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:54:25,723 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 19:54:25,862 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:54:25,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:54:26,358 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:54:26,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:54:26,523 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 19:54:26,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:54:26 BoogieIcfgContainer [2023-08-30 19:54:26,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:54:26,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:54:26,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:54:26,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:54:26,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:54:25" (1/3) ... [2023-08-30 19:54:26,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160247a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:54:26, skipping insertion in model container [2023-08-30 19:54:26,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:54:25" (2/3) ... [2023-08-30 19:54:26,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160247a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:54:26, skipping insertion in model container [2023-08-30 19:54:26,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:54:26" (3/3) ... [2023-08-30 19:54:26,533 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-08-30 19:54:26,540 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:54:26,549 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:54:26,550 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:54:26,550 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:54:26,619 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 19:54:26,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 239 transitions, 510 flow [2023-08-30 19:54:26,730 INFO L130 PetriNetUnfolder]: 19/235 cut-off events. [2023-08-30 19:54:26,730 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 19:54:26,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 235 events. 19/235 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 119 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2023-08-30 19:54:26,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 239 transitions, 510 flow [2023-08-30 19:54:26,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 223 transitions, 470 flow [2023-08-30 19:54:26,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:54:26,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 223 transitions, 470 flow [2023-08-30 19:54:26,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 223 transitions, 470 flow [2023-08-30 19:54:26,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 223 transitions, 470 flow [2023-08-30 19:54:26,829 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-08-30 19:54:26,829 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 19:54:26,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 223 events. 19/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2023-08-30 19:54:26,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-08-30 19:54:35,498 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-08-30 19:54:35,498 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-30 19:54:35,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:54:35,516 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;@79a672a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:54:35,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 19:54:35,524 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2023-08-30 19:54:35,525 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 19:54:35,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:54:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:54:35,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:54:35,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:54:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash -13559017, now seen corresponding path program 1 times [2023-08-30 19:54:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:54:35,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733159434] [2023-08-30 19:54:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:54:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:54:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:54:36,394 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 19:54:36,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:54:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733159434] [2023-08-30 19:54:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733159434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:54:36,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:54:36,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 19:54:36,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537258315] [2023-08-30 19:54:36,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:54:36,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:54:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:54:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:54:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:54:36,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 458 [2023-08-30 19:54:36,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 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 19:54:36,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:54:36,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 458 [2023-08-30 19:54:36,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:54:37,179 INFO L130 PetriNetUnfolder]: 4038/5324 cut-off events. [2023-08-30 19:54:37,179 INFO L131 PetriNetUnfolder]: For 385/385 co-relation queries the response was YES. [2023-08-30 19:54:37,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10975 conditions, 5324 events. 4038/5324 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23782 event pairs, 572 based on Foata normal form. 0/3871 useless extension candidates. Maximal degree in co-relation 8632. Up to 2390 conditions per place. [2023-08-30 19:54:37,213 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 72 selfloop transitions, 6 changer transitions 9/91 dead transitions. [2023-08-30 19:54:37,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 91 transitions, 413 flow [2023-08-30 19:54:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:54:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:54:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1319 transitions. [2023-08-30 19:54:37,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799854439592431 [2023-08-30 19:54:37,235 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1319 transitions. [2023-08-30 19:54:37,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1319 transitions. [2023-08-30 19:54:37,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:54:37,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1319 transitions. [2023-08-30 19:54:37,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.83333333333334) internal successors, (1319), 6 states have internal predecessors, (1319), 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 19:54:37,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 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 19:54:37,259 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 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 19:54:37,261 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 6 states and 1319 transitions. [2023-08-30 19:54:37,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 91 transitions, 413 flow [2023-08-30 19:54:37,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 91 transitions, 375 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 19:54:37,276 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 121 flow [2023-08-30 19:54:37,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-30 19:54:37,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-30 19:54:37,281 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 121 flow [2023-08-30 19:54:37,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 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 19:54:37,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:54:37,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:54:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:54:37,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:54:37,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:54:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1324692751, now seen corresponding path program 1 times [2023-08-30 19:54:37,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:54:37,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616869701] [2023-08-30 19:54:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:54:37,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:54:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:54:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:54:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:54:37,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616869701] [2023-08-30 19:54:37,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616869701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:54:37,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:54:37,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:54:37,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130132323] [2023-08-30 19:54:37,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:54:37,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:54:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:54:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:54:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:54:37,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 458 [2023-08-30 19:54:37,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 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 19:54:37,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:54:37,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 458 [2023-08-30 19:54:37,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:54:38,087 INFO L130 PetriNetUnfolder]: 3465/4770 cut-off events. [2023-08-30 19:54:38,087 INFO L131 PetriNetUnfolder]: For 1569/1795 co-relation queries the response was YES. [2023-08-30 19:54:38,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 4770 events. 3465/4770 cut-off events. For 1569/1795 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23731 event pairs, 2333 based on Foata normal form. 312/3898 useless extension candidates. Maximal degree in co-relation 6367. Up to 4194 conditions per place. [2023-08-30 19:54:38,121 INFO L137 encePairwiseOnDemand]: 453/458 looper letters, 32 selfloop transitions, 2 changer transitions 21/63 dead transitions. [2023-08-30 19:54:38,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 284 flow [2023-08-30 19:54:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:54:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:54:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 859 transitions. [2023-08-30 19:54:38,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46888646288209607 [2023-08-30 19:54:38,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 859 transitions. [2023-08-30 19:54:38,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 859 transitions. [2023-08-30 19:54:38,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:54:38,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 859 transitions. [2023-08-30 19:54:38,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 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 19:54:38,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 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 19:54:38,131 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 458.0) internal successors, (2290), 5 states have internal predecessors, (2290), 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 19:54:38,132 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 121 flow. Second operand 4 states and 859 transitions. [2023-08-30 19:54:38,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 284 flow [2023-08-30 19:54:38,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 19:54:38,135 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2023-08-30 19:54:38,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 19:54:38,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 19:54:38,136 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2023-08-30 19:54:38,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 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 19:54:38,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:54:38,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:54:38,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:54:38,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:54:38,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:54:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1032841996, now seen corresponding path program 1 times [2023-08-30 19:54:38,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:54:38,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837226085] [2023-08-30 19:54:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:54:38,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:54:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:54:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:54:38,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:54:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837226085] [2023-08-30 19:54:38,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837226085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:54:38,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:54:38,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 19:54:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295727060] [2023-08-30 19:54:38,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:54:38,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 19:54:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:54:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 19:54:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 19:54:38,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 458 [2023-08-30 19:54:38,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 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 19:54:38,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:54:38,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 458 [2023-08-30 19:54:38,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:54:39,797 INFO L130 PetriNetUnfolder]: 8577/11322 cut-off events. [2023-08-30 19:54:39,797 INFO L131 PetriNetUnfolder]: For 4049/4049 co-relation queries the response was YES. [2023-08-30 19:54:39,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27965 conditions, 11322 events. 8577/11322 cut-off events. For 4049/4049 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 58378 event pairs, 1867 based on Foata normal form. 126/9403 useless extension candidates. Maximal degree in co-relation 27950. Up to 4329 conditions per place. [2023-08-30 19:54:39,886 INFO L137 encePairwiseOnDemand]: 452/458 looper letters, 93 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2023-08-30 19:54:39,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 539 flow [2023-08-30 19:54:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:54:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:54:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1318 transitions. [2023-08-30 19:54:39,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796215429403202 [2023-08-30 19:54:39,891 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1318 transitions. [2023-08-30 19:54:39,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1318 transitions. [2023-08-30 19:54:39,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:54:39,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1318 transitions. [2023-08-30 19:54:39,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.66666666666666) internal successors, (1318), 6 states have internal predecessors, (1318), 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 19:54:39,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 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 19:54:39,901 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 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 19:54:39,902 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 6 states and 1318 transitions. [2023-08-30 19:54:39,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 539 flow [2023-08-30 19:54:39,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 535 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 19:54:39,906 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 227 flow [2023-08-30 19:54:39,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=227, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-30 19:54:39,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-30 19:54:39,907 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 227 flow [2023-08-30 19:54:39,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 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 19:54:39,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:54:39,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:54:39,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:54:39,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:54:39,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:54:39,910 INFO L85 PathProgramCache]: Analyzing trace with hash -88060108, now seen corresponding path program 1 times [2023-08-30 19:54:39,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:54:39,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502142892] [2023-08-30 19:54:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:54:39,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:54:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:54:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:54:40,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:54:40,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502142892] [2023-08-30 19:54:40,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502142892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:54:40,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825907960] [2023-08-30 19:54:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:54:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:54:40,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:54:40,709 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 19:54:40,727 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 19:54:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:54:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 19:54:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:54:41,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 19:54:41,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:54:41,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:54:41,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:54:41,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-30 19:54:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:54:41,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:54:42,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:54:42,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2023-08-30 19:54:42,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 287 [2023-08-30 19:54:42,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 263 [2023-08-30 19:54:42,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 215 [2023-08-30 19:54:42,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 101 [2023-08-30 19:54:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:54:42,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825907960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:54:42,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:54:42,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 26 [2023-08-30 19:54:42,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553249143] [2023-08-30 19:54:42,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:54:42,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 19:54:42,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:54:42,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 19:54:42,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=610, Unknown=4, NotChecked=0, Total=756 [2023-08-30 19:54:45,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:54:48,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:54:50,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:54:52,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:54:53,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 458 [2023-08-30 19:54:53,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 227 flow. Second operand has 28 states, 28 states have (on average 132.71428571428572) internal successors, (3716), 28 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:54:53,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:54:53,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 458 [2023-08-30 19:54:53,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:54:55,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:54:58,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:55:15,349 INFO L130 PetriNetUnfolder]: 84742/112047 cut-off events. [2023-08-30 19:55:15,349 INFO L131 PetriNetUnfolder]: For 158294/158294 co-relation queries the response was YES. [2023-08-30 19:55:15,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332910 conditions, 112047 events. 84742/112047 cut-off events. For 158294/158294 co-relation queries the response was YES. Maximal size of possible extension queue 3472. Compared 665591 event pairs, 3928 based on Foata normal form. 122/98717 useless extension candidates. Maximal degree in co-relation 262697. Up to 16590 conditions per place. [2023-08-30 19:55:16,124 INFO L137 encePairwiseOnDemand]: 440/458 looper letters, 921 selfloop transitions, 245 changer transitions 97/1263 dead transitions. [2023-08-30 19:55:16,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 1263 transitions, 7819 flow [2023-08-30 19:55:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 19:55:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 19:55:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 9493 transitions. [2023-08-30 19:55:16,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31887806516627476 [2023-08-30 19:55:16,154 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 9493 transitions. [2023-08-30 19:55:16,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 9493 transitions. [2023-08-30 19:55:16,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:55:16,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 9493 transitions. [2023-08-30 19:55:16,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 146.04615384615386) internal successors, (9493), 65 states have internal predecessors, (9493), 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 19:55:16,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 458.0) internal successors, (30228), 66 states have internal predecessors, (30228), 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 19:55:16,230 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 458.0) internal successors, (30228), 66 states have internal predecessors, (30228), 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 19:55:16,230 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 227 flow. Second operand 65 states and 9493 transitions. [2023-08-30 19:55:16,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 1263 transitions, 7819 flow [2023-08-30 19:55:16,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 1263 transitions, 7664 flow, removed 75 selfloop flow, removed 1 redundant places. [2023-08-30 19:55:16,457 INFO L231 Difference]: Finished difference. Result has 160 places, 352 transitions, 2933 flow [2023-08-30 19:55:16,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=2933, PETRI_PLACES=160, PETRI_TRANSITIONS=352} [2023-08-30 19:55:16,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2023-08-30 19:55:16,459 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 352 transitions, 2933 flow [2023-08-30 19:55:16,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 132.71428571428572) internal successors, (3716), 28 states have internal predecessors, (3716), 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 19:55:16,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:55:16,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:55:16,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:55:16,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:55:16,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:55:16,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:55:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1387397044, now seen corresponding path program 2 times [2023-08-30 19:55:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:55:16,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766136170] [2023-08-30 19:55:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:55:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:55:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:55:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:55:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:55:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766136170] [2023-08-30 19:55:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766136170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:55:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648427521] [2023-08-30 19:55:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:55:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:55:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:55:17,601 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 19:55:17,605 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 19:55:17,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:55:17,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:55:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 19:55:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:55:17,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 19:55:17,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:55:18,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:55:18,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 19:55:18,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:55:18,447 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 16 treesize of output 18 [2023-08-30 19:55:18,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-30 19:55:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:55:18,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:55:19,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:55:19,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-08-30 19:55:19,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2837 treesize of output 2765 [2023-08-30 19:55:19,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 216 [2023-08-30 19:55:19,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 233 [2023-08-30 19:55:19,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 209 [2023-08-30 19:55:19,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2023-08-30 19:55:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:55:19,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648427521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:55:19,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:55:19,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-08-30 19:55:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681293135] [2023-08-30 19:55:19,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:55:19,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:55:19,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:55:19,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:55:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=503, Unknown=10, NotChecked=0, Total=600 [2023-08-30 19:55:21,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-08-30 19:55:21,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 352 transitions, 2933 flow. Second operand has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 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 19:55:21,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:55:21,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-08-30 19:55:21,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:55:38,928 INFO L130 PetriNetUnfolder]: 89637/117920 cut-off events. [2023-08-30 19:55:38,928 INFO L131 PetriNetUnfolder]: For 1399025/1402777 co-relation queries the response was YES. [2023-08-30 19:55:40,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588702 conditions, 117920 events. 89637/117920 cut-off events. For 1399025/1402777 co-relation queries the response was YES. Maximal size of possible extension queue 4996. Compared 745091 event pairs, 13928 based on Foata normal form. 1844/116980 useless extension candidates. Maximal degree in co-relation 588563. Up to 62258 conditions per place. [2023-08-30 19:55:41,051 INFO L137 encePairwiseOnDemand]: 446/458 looper letters, 363 selfloop transitions, 96 changer transitions 27/517 dead transitions. [2023-08-30 19:55:41,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 517 transitions, 5083 flow [2023-08-30 19:55:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 19:55:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 19:55:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2488 transitions. [2023-08-30 19:55:41,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3395196506550218 [2023-08-30 19:55:41,060 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2488 transitions. [2023-08-30 19:55:41,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2488 transitions. [2023-08-30 19:55:41,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:55:41,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2488 transitions. [2023-08-30 19:55:41,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.5) internal successors, (2488), 16 states have internal predecessors, (2488), 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 19:55:41,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 458.0) internal successors, (7786), 17 states have internal predecessors, (7786), 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 19:55:41,078 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 458.0) internal successors, (7786), 17 states have internal predecessors, (7786), 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 19:55:41,079 INFO L175 Difference]: Start difference. First operand has 160 places, 352 transitions, 2933 flow. Second operand 16 states and 2488 transitions. [2023-08-30 19:55:41,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 517 transitions, 5083 flow [2023-08-30 19:56:29,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 517 transitions, 4677 flow, removed 202 selfloop flow, removed 3 redundant places. [2023-08-30 19:56:29,880 INFO L231 Difference]: Finished difference. Result has 174 places, 362 transitions, 2964 flow [2023-08-30 19:56:29,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2964, PETRI_PLACES=174, PETRI_TRANSITIONS=362} [2023-08-30 19:56:29,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2023-08-30 19:56:29,881 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 362 transitions, 2964 flow [2023-08-30 19:56:29,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 148.0) internal successors, (3700), 25 states have internal predecessors, (3700), 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 19:56:29,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:56:29,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:56:29,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 19:56:30,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:56:30,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:56:30,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:56:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1080676777, now seen corresponding path program 3 times [2023-08-30 19:56:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:56:30,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721258040] [2023-08-30 19:56:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:56:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:56:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:56:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:56:31,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:56:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721258040] [2023-08-30 19:56:31,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721258040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:56:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556693700] [2023-08-30 19:56:31,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:56:31,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:56:31,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:56:31,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:56:31,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:56:31,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:56:31,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:56:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 19:56:31,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:56:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:56:32,091 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 18 treesize of output 20 [2023-08-30 19:56:32,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-30 19:56:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:56:32,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:56:32,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:56:32,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-30 19:56:32,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-08-30 19:56:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:56:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556693700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:56:32,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:56:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-08-30 19:56:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703013869] [2023-08-30 19:56:32,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:56:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:56:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:56:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:56:32,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=357, Unknown=4, NotChecked=0, Total=420 [2023-08-30 19:56:34,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:56:36,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:56:37,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 458 [2023-08-30 19:56:37,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 362 transitions, 2964 flow. Second operand has 21 states, 21 states have (on average 150.9047619047619) internal successors, (3169), 21 states have internal predecessors, (3169), 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 19:56:37,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:56:37,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 458 [2023-08-30 19:56:37,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:57:01,533 INFO L130 PetriNetUnfolder]: 123887/163661 cut-off events. [2023-08-30 19:57:01,534 INFO L131 PetriNetUnfolder]: For 1902368/1907238 co-relation queries the response was YES. [2023-08-30 19:57:03,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823471 conditions, 163661 events. 123887/163661 cut-off events. For 1902368/1907238 co-relation queries the response was YES. Maximal size of possible extension queue 7042. Compared 1082612 event pairs, 17385 based on Foata normal form. 2229/161995 useless extension candidates. Maximal degree in co-relation 823325. Up to 98041 conditions per place. [2023-08-30 19:57:04,200 INFO L137 encePairwiseOnDemand]: 447/458 looper letters, 475 selfloop transitions, 185 changer transitions 14/705 dead transitions. [2023-08-30 19:57:04,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 705 transitions, 6896 flow [2023-08-30 19:57:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:57:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:57:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2254 transitions. [2023-08-30 19:57:04,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35152838427947597 [2023-08-30 19:57:04,206 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2254 transitions. [2023-08-30 19:57:04,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2254 transitions. [2023-08-30 19:57:04,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:57:04,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2254 transitions. [2023-08-30 19:57:04,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.0) internal successors, (2254), 14 states have internal predecessors, (2254), 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 19:57:04,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 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 19:57:04,218 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 458.0) internal successors, (6870), 15 states have internal predecessors, (6870), 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 19:57:04,218 INFO L175 Difference]: Start difference. First operand has 174 places, 362 transitions, 2964 flow. Second operand 14 states and 2254 transitions. [2023-08-30 19:57:04,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 705 transitions, 6896 flow [2023-08-30 19:58:27,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 705 transitions, 6726 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-08-30 19:58:27,030 INFO L231 Difference]: Finished difference. Result has 176 places, 470 transitions, 4449 flow [2023-08-30 19:58:27,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4449, PETRI_PLACES=176, PETRI_TRANSITIONS=470} [2023-08-30 19:58:27,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2023-08-30 19:58:27,032 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 470 transitions, 4449 flow [2023-08-30 19:58:27,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.9047619047619) internal successors, (3169), 21 states have internal predecessors, (3169), 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 19:58:27,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:58:27,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:58:27,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:58:27,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:27,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:58:27,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:58:27,234 INFO L85 PathProgramCache]: Analyzing trace with hash -112453905, now seen corresponding path program 4 times [2023-08-30 19:58:27,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:58:27,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937816192] [2023-08-30 19:58:27,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:58:27,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:58:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:58:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:28,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:58:28,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937816192] [2023-08-30 19:58:28,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937816192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:58:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634489196] [2023-08-30 19:58:28,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:58:28,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:58:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:58:28,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:58:28,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:58:29,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:58:29,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:58:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 19:58:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:58:29,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:29,391 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 19 treesize of output 21 [2023-08-30 19:58:29,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:58:29,463 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 19 treesize of output 21 [2023-08-30 19:58:29,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-08-30 19:58:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:29,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:58:29,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:58:29,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 79 [2023-08-30 19:58:29,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 19:58:29,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-30 19:58:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:58:30,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634489196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:58:30,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:58:30,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 19:58:30,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735300111] [2023-08-30 19:58:30,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:58:30,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:58:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:58:30,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:58:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=602, Unknown=3, NotChecked=0, Total=702 [2023-08-30 19:58:32,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:34,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:36,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:38,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:40,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:43,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:45,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:47,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:48,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:50,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:52,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:54,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:56,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:58:58,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:59:01,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:59:03,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:59:03,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 458 [2023-08-30 19:59:03,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 470 transitions, 4449 flow. Second operand has 27 states, 27 states have (on average 147.88888888888889) internal successors, (3993), 27 states have internal predecessors, (3993), 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 19:59:03,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:59:03,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 458 [2023-08-30 19:59:03,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand