./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.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-more-inc-subseq.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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --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 20:43:13,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:43:13,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:43:13,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:43:13,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:43:13,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:43:13,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:43:13,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:43:13,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:43:13,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:43:13,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:43:13,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:43:13,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:43:13,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:43:13,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:43:13,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:43:13,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:43:13,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:43:13,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:43:13,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:43:13,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:43:13,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:43:13,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:43:13,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:43:13,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:43:13,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:43:13,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:43:13,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:43:13,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:43:13,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:43:13,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:43:13,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:43:13,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:43:13,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:43:13,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:43:13,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:43:13,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:43:13,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:43:13,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:43:13,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:43:13,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:43:13,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:43:13,597 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:43:13,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:43:13,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:43:13,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:43:13,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:43:13,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:43:13,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:43:13,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:43:13,600 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:43:13,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:43:13,600 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:43:13,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:43:13,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:43:13,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:43:13,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:43:13,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:43:13,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:43:13,601 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:43:13,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:43:13,602 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:43:13,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:43:13,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:43:13,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:43:13,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:43:13,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:43:13,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:43:13,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:43:13,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:43:13,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:43:13,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:43:13,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:43:13,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:43:13,604 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:43:13,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:43:13,604 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:43:13,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:43:13,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:43:13,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:43:13,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:43:13,851 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:43:13,852 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:43:13,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 20:43:14,761 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:43:14,954 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:43:14,955 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2023-08-30 20:43:14,959 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ecf23fd1/238e221b9d4145d5864e4e02b2db4532/FLAG8d547713d [2023-08-30 20:43:14,972 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ecf23fd1/238e221b9d4145d5864e4e02b2db4532 [2023-08-30 20:43:14,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:43:14,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:43:14,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:43:14,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:43:14,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:43:14,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:43:14" (1/1) ... [2023-08-30 20:43:14,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388154bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:14, skipping insertion in model container [2023-08-30 20:43:14,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:43:14" (1/1) ... [2023-08-30 20:43:14,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:43:15,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:43:15,149 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-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 20:43:15,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:43:15,170 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:43:15,199 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-more-inc-subseq.wvr.c[2924,2937] [2023-08-30 20:43:15,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:43:15,210 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:43:15,211 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:43:15,215 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:43:15,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15 WrapperNode [2023-08-30 20:43:15,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:43:15,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:43:15,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:43:15,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:43:15,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,262 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 196 [2023-08-30 20:43:15,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:43:15,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:43:15,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:43:15,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:43:15,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:43:15,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:43:15,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:43:15,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:43:15,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (1/1) ... [2023-08-30 20:43:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:43:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:15,324 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 20:43:15,336 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 20:43:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:43:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:43:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:43:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:43:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:43:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:43:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:43:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:43:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:43:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:43:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:43:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:43:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:43:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:43:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:43:15,355 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 20:43:15,422 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:43:15,423 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:43:15,746 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:43:15,821 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:43:15,825 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:43:15,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:43:15 BoogieIcfgContainer [2023-08-30 20:43:15,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:43:15,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:43:15,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:43:15,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:43:15,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:43:14" (1/3) ... [2023-08-30 20:43:15,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7343e0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:43:15, skipping insertion in model container [2023-08-30 20:43:15,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:43:15" (2/3) ... [2023-08-30 20:43:15,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7343e0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:43:15, skipping insertion in model container [2023-08-30 20:43:15,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:43:15" (3/3) ... [2023-08-30 20:43:15,834 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-08-30 20:43:15,839 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:43:15,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:43:15,845 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:43:15,845 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:43:15,908 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:43:15,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 178 transitions, 372 flow [2023-08-30 20:43:16,016 INFO L130 PetriNetUnfolder]: 15/176 cut-off events. [2023-08-30 20:43:16,016 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:43:16,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 15/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 108 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-30 20:43:16,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 178 transitions, 372 flow [2023-08-30 20:43:16,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2023-08-30 20:43:16,027 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:43:16,036 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 168 transitions, 348 flow [2023-08-30 20:43:16,039 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 168 transitions, 348 flow [2023-08-30 20:43:16,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 168 transitions, 348 flow [2023-08-30 20:43:16,074 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-08-30 20:43:16,074 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:43:16,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2023-08-30 20:43:16,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-08-30 20:43:20,502 INFO L134 LiptonReduction]: Checked pairs total: 1199 [2023-08-30 20:43:20,502 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-30 20:43:20,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:43:20,515 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;@f0ecca7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:43:20,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:43:20,519 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-08-30 20:43:20,519 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:43:20,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:20,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:20,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:20,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1033780346, now seen corresponding path program 1 times [2023-08-30 20:43:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:20,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623386444] [2023-08-30 20:43:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:43:20,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:20,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623386444] [2023-08-30 20:43:20,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623386444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:43:20,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:43:20,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:43:20,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56276732] [2023-08-30 20:43:20,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:43:20,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:43:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:43:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:43:20,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 352 [2023-08-30 20:43:20,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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 20:43:20,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:20,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 352 [2023-08-30 20:43:20,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:21,040 INFO L130 PetriNetUnfolder]: 93/157 cut-off events. [2023-08-30 20:43:21,040 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 20:43:21,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 157 events. 93/157 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 450 event pairs, 51 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 267. Up to 154 conditions per place. [2023-08-30 20:43:21,043 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-30 20:43:21,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 106 flow [2023-08-30 20:43:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:43:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:43:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-30 20:43:21,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 20:43:21,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-30 20:43:21,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-30 20:43:21,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:21,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-30 20:43:21,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 20:43:21,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 20:43:21,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 20:43:21,072 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 3 states and 480 transitions. [2023-08-30 20:43:21,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 106 flow [2023-08-30 20:43:21,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:43:21,075 INFO L231 Difference]: Finished difference. Result has 24 places, 24 transitions, 62 flow [2023-08-30 20:43:21,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=24, PETRI_TRANSITIONS=24} [2023-08-30 20:43:21,079 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-30 20:43:21,079 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 24 transitions, 62 flow [2023-08-30 20:43:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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 20:43:21,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:21,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:21,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:43:21,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:21,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash -25586866, now seen corresponding path program 1 times [2023-08-30 20:43:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:21,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76260396] [2023-08-30 20:43:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:43:21,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76260396] [2023-08-30 20:43:21,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76260396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583042996] [2023-08-30 20:43:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:21,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:21,201 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 20:43:21,233 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 20:43:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:43:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:43:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:43:21,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:43:21,414 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 20:43:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583042996] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:21,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:43:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-08-30 20:43:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707796748] [2023-08-30 20:43:21,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:43:21,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:43:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:43:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:43:21,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-08-30 20:43:21,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 24 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 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 20:43:21,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:21,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-08-30 20:43:21,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:21,569 INFO L130 PetriNetUnfolder]: 170/274 cut-off events. [2023-08-30 20:43:21,569 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 20:43:21,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 274 events. 170/274 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 36 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 550. Up to 102 conditions per place. [2023-08-30 20:43:21,570 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 32 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-30 20:43:21,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 178 flow [2023-08-30 20:43:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:43:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:43:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2023-08-30 20:43:21,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256628787878788 [2023-08-30 20:43:21,572 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2023-08-30 20:43:21,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2023-08-30 20:43:21,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:21,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2023-08-30 20:43:21,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 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 20:43:21,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 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 20:43:21,577 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 352.0) internal successors, (2464), 7 states have internal predecessors, (2464), 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 20:43:21,577 INFO L175 Difference]: Start difference. First operand has 24 places, 24 transitions, 62 flow. Second operand 6 states and 899 transitions. [2023-08-30 20:43:21,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 178 flow [2023-08-30 20:43:21,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:43:21,578 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2023-08-30 20:43:21,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-30 20:43:21,579 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-30 20:43:21,579 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2023-08-30 20:43:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 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 20:43:21,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:21,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:21,586 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 20:43:21,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:21,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:21,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1406989011, now seen corresponding path program 1 times [2023-08-30 20:43:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:21,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614926609] [2023-08-30 20:43:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:21,866 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 20:43:21,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614926609] [2023-08-30 20:43:21,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614926609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:43:21,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:43:21,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:43:21,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113956507] [2023-08-30 20:43:21,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:43:21,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:43:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:43:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:43:21,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 352 [2023-08-30 20:43:21,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 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 20:43:21,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:21,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 352 [2023-08-30 20:43:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:22,011 INFO L130 PetriNetUnfolder]: 294/476 cut-off events. [2023-08-30 20:43:22,011 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2023-08-30 20:43:22,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 476 events. 294/476 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1767 event pairs, 55 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1126. Up to 250 conditions per place. [2023-08-30 20:43:22,016 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 46 selfloop transitions, 16 changer transitions 0/62 dead transitions. [2023-08-30 20:43:22,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 336 flow [2023-08-30 20:43:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:43:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:43:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2023-08-30 20:43:22,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45397727272727273 [2023-08-30 20:43:22,018 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2023-08-30 20:43:22,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2023-08-30 20:43:22,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:22,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2023-08-30 20:43:22,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 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 20:43:22,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 20:43:22,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 20:43:22,023 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 5 states and 799 transitions. [2023-08-30 20:43:22,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 336 flow [2023-08-30 20:43:22,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:43:22,028 INFO L231 Difference]: Finished difference. Result has 35 places, 41 transitions, 234 flow [2023-08-30 20:43:22,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=35, PETRI_TRANSITIONS=41} [2023-08-30 20:43:22,029 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-08-30 20:43:22,029 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 41 transitions, 234 flow [2023-08-30 20:43:22,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 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 20:43:22,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:22,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:22,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:43:22,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:22,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1352553143, now seen corresponding path program 2 times [2023-08-30 20:43:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:22,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388051145] [2023-08-30 20:43:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:43:22,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:22,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388051145] [2023-08-30 20:43:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388051145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:43:22,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:43:22,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:43:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598878108] [2023-08-30 20:43:22,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:43:22,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:43:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:43:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:43:22,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 352 [2023-08-30 20:43:22,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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 20:43:22,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:22,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 352 [2023-08-30 20:43:22,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:22,186 INFO L130 PetriNetUnfolder]: 477/766 cut-off events. [2023-08-30 20:43:22,186 INFO L131 PetriNetUnfolder]: For 1197/1219 co-relation queries the response was YES. [2023-08-30 20:43:22,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 766 events. 477/766 cut-off events. For 1197/1219 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3156 event pairs, 137 based on Foata normal form. 16/766 useless extension candidates. Maximal degree in co-relation 2675. Up to 433 conditions per place. [2023-08-30 20:43:22,190 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 62 selfloop transitions, 4 changer transitions 2/70 dead transitions. [2023-08-30 20:43:22,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 70 transitions, 562 flow [2023-08-30 20:43:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:43:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:43:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-08-30 20:43:22,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2023-08-30 20:43:22,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-08-30 20:43:22,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-08-30 20:43:22,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:22,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-08-30 20:43:22,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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 20:43:22,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 20:43:22,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 20:43:22,195 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 234 flow. Second operand 3 states and 507 transitions. [2023-08-30 20:43:22,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 70 transitions, 562 flow [2023-08-30 20:43:22,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 70 transitions, 562 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 20:43:22,198 INFO L231 Difference]: Finished difference. Result has 38 places, 44 transitions, 271 flow [2023-08-30 20:43:22,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=38, PETRI_TRANSITIONS=44} [2023-08-30 20:43:22,199 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-08-30 20:43:22,199 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 271 flow [2023-08-30 20:43:22,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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 20:43:22,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:22,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:22,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:43:22,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:22,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:22,201 INFO L85 PathProgramCache]: Analyzing trace with hash -84645957, now seen corresponding path program 1 times [2023-08-30 20:43:22,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:22,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090448010] [2023-08-30 20:43:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:22,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:43:22,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:22,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090448010] [2023-08-30 20:43:22,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090448010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:22,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359870873] [2023-08-30 20:43:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:22,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:22,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:22,326 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 20:43:22,328 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 20:43:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:22,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:43:22,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:43:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:43:22,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:43:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359870873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:43:22,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:43:22,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-08-30 20:43:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309877700] [2023-08-30 20:43:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:43:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:43:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:43:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:43:22,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 352 [2023-08-30 20:43:22,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 20:43:22,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:22,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 352 [2023-08-30 20:43:22,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:22,513 INFO L130 PetriNetUnfolder]: 398/667 cut-off events. [2023-08-30 20:43:22,514 INFO L131 PetriNetUnfolder]: For 1124/1156 co-relation queries the response was YES. [2023-08-30 20:43:22,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 667 events. 398/667 cut-off events. For 1124/1156 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2635 event pairs, 91 based on Foata normal form. 46/705 useless extension candidates. Maximal degree in co-relation 2414. Up to 555 conditions per place. [2023-08-30 20:43:22,517 INFO L137 encePairwiseOnDemand]: 349/352 looper letters, 47 selfloop transitions, 2 changer transitions 5/56 dead transitions. [2023-08-30 20:43:22,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 430 flow [2023-08-30 20:43:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:43:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:43:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-30 20:43:22,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2023-08-30 20:43:22,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-30 20:43:22,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-30 20:43:22,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:22,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-30 20:43:22,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 20:43:22,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 20:43:22,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 20:43:22,522 INFO L175 Difference]: Start difference. First operand has 38 places, 44 transitions, 271 flow. Second operand 3 states and 502 transitions. [2023-08-30 20:43:22,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 430 flow [2023-08-30 20:43:22,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:43:22,524 INFO L231 Difference]: Finished difference. Result has 40 places, 44 transitions, 273 flow [2023-08-30 20:43:22,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2023-08-30 20:43:22,525 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-08-30 20:43:22,525 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 273 flow [2023-08-30 20:43:22,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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 20:43:22,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:22,525 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] [2023-08-30 20:43:22,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:43:22,734 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 20:43:22,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:22,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:22,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1320014892, now seen corresponding path program 1 times [2023-08-30 20:43:22,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:22,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145983227] [2023-08-30 20:43:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:22,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:43:22,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145983227] [2023-08-30 20:43:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145983227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:43:22,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:43:22,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:43:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037254473] [2023-08-30 20:43:22,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:43:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:43:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:43:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:43:22,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 352 [2023-08-30 20:43:22,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 20:43:22,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:22,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 352 [2023-08-30 20:43:22,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:22,937 INFO L130 PetriNetUnfolder]: 448/776 cut-off events. [2023-08-30 20:43:22,937 INFO L131 PetriNetUnfolder]: For 1574/1606 co-relation queries the response was YES. [2023-08-30 20:43:22,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 776 events. 448/776 cut-off events. For 1574/1606 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3252 event pairs, 242 based on Foata normal form. 42/807 useless extension candidates. Maximal degree in co-relation 2509. Up to 660 conditions per place. [2023-08-30 20:43:22,940 INFO L137 encePairwiseOnDemand]: 347/352 looper letters, 41 selfloop transitions, 2 changer transitions 20/65 dead transitions. [2023-08-30 20:43:22,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 505 flow [2023-08-30 20:43:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:43:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:43:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-08-30 20:43:22,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44829545454545455 [2023-08-30 20:43:22,942 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-08-30 20:43:22,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-08-30 20:43:22,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:22,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-08-30 20:43:22,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 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 20:43:22,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 20:43:22,946 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 20:43:22,946 INFO L175 Difference]: Start difference. First operand has 40 places, 44 transitions, 273 flow. Second operand 5 states and 789 transitions. [2023-08-30 20:43:22,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 505 flow [2023-08-30 20:43:22,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:43:22,949 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 287 flow [2023-08-30 20:43:22,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-30 20:43:22,951 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2023-08-30 20:43:22,951 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 287 flow [2023-08-30 20:43:22,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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 20:43:22,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:22,951 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] [2023-08-30 20:43:22,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 20:43:22,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:22,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1802696178, now seen corresponding path program 1 times [2023-08-30 20:43:22,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:22,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492410262] [2023-08-30 20:43:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:22,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:43:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492410262] [2023-08-30 20:43:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492410262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613212756] [2023-08-30 20:43:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:23,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:23,674 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 20:43:23,676 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 20:43:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 20:43:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:43:23,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:43:23,937 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 20:43:24,192 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-30 20:43:24,192 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 42 treesize of output 10 [2023-08-30 20:43:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:43:24,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:43:24,506 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~end~0) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| c_~last~0) (<= (+ c_~end~0 1) c_~start~0) (< c_~start~0 0) (let ((.cse1 (+ (* c_~end~0 4) c_~queue~0.offset)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (not (= (select .cse0 .cse1) (select (select .cse2 c_~A~0.base) .cse3))) (< c_~v_old~0 (+ (select .cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) 1)))))) (or (forall ((v_ArrVal_173 (Array Int Int)) (~queue~0.base Int)) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_173))) (= (select (select .cse4 ~queue~0.base) .cse1) (select (select .cse4 c_~A~0.base) .cse3))))) (not (= (mod c_~ok~0 256) 0)))))) is different from false [2023-08-30 20:43:24,592 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2023-08-30 20:43:24,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 251 [2023-08-30 20:43:24,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:24,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 185 [2023-08-30 20:43:24,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:24,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 137 [2023-08-30 20:43:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:43:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613212756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:43:25,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:43:25,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-30 20:43:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504599538] [2023-08-30 20:43:25,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:43:25,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:43:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:43:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=639, Unknown=1, NotChecked=54, Total=870 [2023-08-30 20:43:25,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 352 [2023-08-30 20:43:25,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 287 flow. Second operand has 30 states, 30 states have (on average 88.16666666666667) internal successors, (2645), 30 states have internal predecessors, (2645), 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 20:43:25,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:25,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 352 [2023-08-30 20:43:25,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:31,668 INFO L130 PetriNetUnfolder]: 2018/3403 cut-off events. [2023-08-30 20:43:31,668 INFO L131 PetriNetUnfolder]: For 5752/5752 co-relation queries the response was YES. [2023-08-30 20:43:31,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12830 conditions, 3403 events. 2018/3403 cut-off events. For 5752/5752 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19661 event pairs, 180 based on Foata normal form. 35/3434 useless extension candidates. Maximal degree in co-relation 12805. Up to 1081 conditions per place. [2023-08-30 20:43:31,684 INFO L137 encePairwiseOnDemand]: 334/352 looper letters, 262 selfloop transitions, 212 changer transitions 129/603 dead transitions. [2023-08-30 20:43:31,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 603 transitions, 4719 flow [2023-08-30 20:43:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-30 20:43:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-30 20:43:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5500 transitions. [2023-08-30 20:43:31,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2648305084745763 [2023-08-30 20:43:31,697 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5500 transitions. [2023-08-30 20:43:31,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5500 transitions. [2023-08-30 20:43:31,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:31,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5500 transitions. [2023-08-30 20:43:31,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 93.22033898305085) internal successors, (5500), 59 states have internal predecessors, (5500), 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 20:43:31,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 352.0) internal successors, (21120), 60 states have internal predecessors, (21120), 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 20:43:31,729 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 352.0) internal successors, (21120), 60 states have internal predecessors, (21120), 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 20:43:31,729 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 287 flow. Second operand 59 states and 5500 transitions. [2023-08-30 20:43:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 603 transitions, 4719 flow [2023-08-30 20:43:31,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 603 transitions, 4687 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-30 20:43:31,751 INFO L231 Difference]: Finished difference. Result has 139 places, 274 transitions, 2813 flow [2023-08-30 20:43:31,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=2813, PETRI_PLACES=139, PETRI_TRANSITIONS=274} [2023-08-30 20:43:31,752 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 114 predicate places. [2023-08-30 20:43:31,752 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 274 transitions, 2813 flow [2023-08-30 20:43:31,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 88.16666666666667) internal successors, (2645), 30 states have internal predecessors, (2645), 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 20:43:31,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:31,753 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] [2023-08-30 20:43:31,772 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 20:43:31,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:31,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:31,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1654979636, now seen corresponding path program 2 times [2023-08-30 20:43:31,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:31,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473489573] [2023-08-30 20:43:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:31,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:43:32,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:32,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473489573] [2023-08-30 20:43:32,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473489573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:32,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634640484] [2023-08-30 20:43:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:43:32,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:32,534 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 20:43:32,536 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 20:43:32,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:43:32,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:43:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 20:43:32,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:43:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:43:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:43:32,640 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 20:43:32,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 20:43:32,679 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 20:43:32,714 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:43:32,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 20:43:32,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 20:43:32,777 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 20:43:32,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:43:32,895 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 20:43:32,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-08-30 20:43:32,904 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 27 treesize of output 15 [2023-08-30 20:43:33,004 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 20:43:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:43:33,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:43:33,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:33,623 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 117 treesize of output 81 [2023-08-30 20:43:33,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:33,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2188 treesize of output 1978 [2023-08-30 20:43:33,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:33,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1140 treesize of output 1060 [2023-08-30 20:43:33,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:33,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1020 treesize of output 820 [2023-08-30 20:43:33,779 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 566 treesize of output 470 [2023-08-30 20:43:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:43:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634640484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:43:38,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:43:38,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 30 [2023-08-30 20:43:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268185458] [2023-08-30 20:43:38,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:43:38,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:43:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:43:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=803, Unknown=12, NotChecked=0, Total=992 [2023-08-30 20:43:39,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 352 [2023-08-30 20:43:39,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 274 transitions, 2813 flow. Second operand has 32 states, 32 states have (on average 80.0625) internal successors, (2562), 32 states have internal predecessors, (2562), 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 20:43:39,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:39,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 352 [2023-08-30 20:43:39,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:47,181 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 [0, 1] [2023-08-30 20:43:49,469 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 [0, 1] [2023-08-30 20:43:55,915 INFO L130 PetriNetUnfolder]: 2955/4918 cut-off events. [2023-08-30 20:43:55,916 INFO L131 PetriNetUnfolder]: For 88894/88894 co-relation queries the response was YES. [2023-08-30 20:43:55,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37074 conditions, 4918 events. 2955/4918 cut-off events. For 88894/88894 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29359 event pairs, 271 based on Foata normal form. 3/4921 useless extension candidates. Maximal degree in co-relation 37009. Up to 1750 conditions per place. [2023-08-30 20:43:55,970 INFO L137 encePairwiseOnDemand]: 336/352 looper letters, 376 selfloop transitions, 315 changer transitions 32/723 dead transitions. [2023-08-30 20:43:55,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 723 transitions, 9930 flow [2023-08-30 20:43:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 20:43:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 20:43:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3645 transitions. [2023-08-30 20:43:55,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24081659619450316 [2023-08-30 20:43:55,979 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3645 transitions. [2023-08-30 20:43:55,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3645 transitions. [2023-08-30 20:43:55,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:55,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3645 transitions. [2023-08-30 20:43:55,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 84.76744186046511) internal successors, (3645), 43 states have internal predecessors, (3645), 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 20:43:55,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 352.0) internal successors, (15488), 44 states have internal predecessors, (15488), 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 20:43:55,999 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 352.0) internal successors, (15488), 44 states have internal predecessors, (15488), 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 20:43:55,999 INFO L175 Difference]: Start difference. First operand has 139 places, 274 transitions, 2813 flow. Second operand 43 states and 3645 transitions. [2023-08-30 20:43:55,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 723 transitions, 9930 flow [2023-08-30 20:43:56,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 723 transitions, 9141 flow, removed 379 selfloop flow, removed 14 redundant places. [2023-08-30 20:43:56,172 INFO L231 Difference]: Finished difference. Result has 181 places, 485 transitions, 6318 flow [2023-08-30 20:43:56,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=6318, PETRI_PLACES=181, PETRI_TRANSITIONS=485} [2023-08-30 20:43:56,173 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 156 predicate places. [2023-08-30 20:43:56,173 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 485 transitions, 6318 flow [2023-08-30 20:43:56,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 80.0625) internal successors, (2562), 32 states have internal predecessors, (2562), 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 20:43:56,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:56,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:56,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 20:43:56,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:56,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:56,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 747110922, now seen corresponding path program 3 times [2023-08-30 20:43:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222794060] [2023-08-30 20:43:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:43:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:56,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222794060] [2023-08-30 20:43:56,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222794060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:56,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909675811] [2023-08-30 20:43:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:43:56,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:56,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:43:56,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:43:56,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:43:56,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:43:56,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:43:56,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:43:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:43:56,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:43:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:43:56,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909675811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:43:56,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:43:56,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-08-30 20:43:56,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107082757] [2023-08-30 20:43:56,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:43:56,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:43:56,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:43:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:43:56,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 352 [2023-08-30 20:43:56,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 485 transitions, 6318 flow. Second operand has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 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 20:43:56,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:56,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 352 [2023-08-30 20:43:56,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:57,942 INFO L130 PetriNetUnfolder]: 3502/5951 cut-off events. [2023-08-30 20:43:57,942 INFO L131 PetriNetUnfolder]: For 111052/111052 co-relation queries the response was YES. [2023-08-30 20:43:57,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47580 conditions, 5951 events. 3502/5951 cut-off events. For 111052/111052 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 36287 event pairs, 427 based on Foata normal form. 180/6131 useless extension candidates. Maximal degree in co-relation 47488. Up to 1968 conditions per place. [2023-08-30 20:43:57,991 INFO L137 encePairwiseOnDemand]: 346/352 looper letters, 470 selfloop transitions, 115 changer transitions 41/626 dead transitions. [2023-08-30 20:43:57,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 626 transitions, 9259 flow [2023-08-30 20:43:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:43:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:43:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2023-08-30 20:43:57,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45211038961038963 [2023-08-30 20:43:57,993 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2023-08-30 20:43:57,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2023-08-30 20:43:57,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:57,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2023-08-30 20:43:57,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 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 20:43:57,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 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 20:43:57,996 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 352.0) internal successors, (2816), 8 states have internal predecessors, (2816), 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 20:43:57,996 INFO L175 Difference]: Start difference. First operand has 181 places, 485 transitions, 6318 flow. Second operand 7 states and 1114 transitions. [2023-08-30 20:43:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 626 transitions, 9259 flow [2023-08-30 20:43:58,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 626 transitions, 8803 flow, removed 209 selfloop flow, removed 10 redundant places. [2023-08-30 20:43:58,249 INFO L231 Difference]: Finished difference. Result has 179 places, 444 transitions, 5855 flow [2023-08-30 20:43:58,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=4863, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5855, PETRI_PLACES=179, PETRI_TRANSITIONS=444} [2023-08-30 20:43:58,250 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 154 predicate places. [2023-08-30 20:43:58,250 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 444 transitions, 5855 flow [2023-08-30 20:43:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 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 20:43:58,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:58,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:58,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 20:43:58,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:58,456 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:43:58,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1720331006, now seen corresponding path program 4 times [2023-08-30 20:43:58,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:58,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763962338] [2023-08-30 20:43:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:58,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:43:58,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:58,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763962338] [2023-08-30 20:43:58,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763962338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:58,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615554815] [2023-08-30 20:43:58,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:43:58,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:58,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:58,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:43:58,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:43:58,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:43:58,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:43:58,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:43:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:43:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:43:58,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:43:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:43:58,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615554815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:43:58,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:43:58,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-30 20:43:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460507898] [2023-08-30 20:43:58,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:43:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:43:58,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:58,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:43:58,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:43:58,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 352 [2023-08-30 20:43:59,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 444 transitions, 5855 flow. Second operand has 15 states, 15 states have (on average 146.4) internal successors, (2196), 15 states have internal predecessors, (2196), 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 20:43:59,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:59,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 352 [2023-08-30 20:43:59,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:44:00,888 INFO L130 PetriNetUnfolder]: 5999/10388 cut-off events. [2023-08-30 20:44:00,888 INFO L131 PetriNetUnfolder]: For 187351/187454 co-relation queries the response was YES. [2023-08-30 20:44:00,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87152 conditions, 10388 events. 5999/10388 cut-off events. For 187351/187454 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 73627 event pairs, 702 based on Foata normal form. 152/10503 useless extension candidates. Maximal degree in co-relation 86647. Up to 3351 conditions per place. [2023-08-30 20:44:01,066 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 887 selfloop transitions, 331 changer transitions 0/1234 dead transitions. [2023-08-30 20:44:01,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1234 transitions, 18903 flow [2023-08-30 20:44:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:44:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:44:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1518 transitions. [2023-08-30 20:44:01,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2023-08-30 20:44:01,069 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1518 transitions. [2023-08-30 20:44:01,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1518 transitions. [2023-08-30 20:44:01,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:44:01,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1518 transitions. [2023-08-30 20:44:01,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 151.8) internal successors, (1518), 10 states have internal predecessors, (1518), 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 20:44:01,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 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 20:44:01,074 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 352.0) internal successors, (3872), 11 states have internal predecessors, (3872), 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 20:44:01,074 INFO L175 Difference]: Start difference. First operand has 179 places, 444 transitions, 5855 flow. Second operand 10 states and 1518 transitions. [2023-08-30 20:44:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1234 transitions, 18903 flow [2023-08-30 20:44:01,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 1234 transitions, 18831 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-30 20:44:01,855 INFO L231 Difference]: Finished difference. Result has 191 places, 650 transitions, 10117 flow [2023-08-30 20:44:01,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10117, PETRI_PLACES=191, PETRI_TRANSITIONS=650} [2023-08-30 20:44:01,856 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 166 predicate places. [2023-08-30 20:44:01,856 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 650 transitions, 10117 flow [2023-08-30 20:44:01,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.4) internal successors, (2196), 15 states have internal predecessors, (2196), 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 20:44:01,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:44:01,857 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:44:01,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:44:02,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:02,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:44:02,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:44:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1635564498, now seen corresponding path program 5 times [2023-08-30 20:44:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:44:02,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499693444] [2023-08-30 20:44:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:44:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:44:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:44:02,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:44:02,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499693444] [2023-08-30 20:44:02,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499693444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:44:02,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267361924] [2023-08-30 20:44:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:44:02,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:02,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:44:02,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:44:03,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:44:03,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:44:03,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:44:03,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 20:44:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:44:03,316 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-08-30 20:44:03,316 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 42 treesize of output 10 [2023-08-30 20:44:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:44:03,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:44:05,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:05,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 121 [2023-08-30 20:44:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 20:44:05,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267361924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:44:05,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:44:05,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 27 [2023-08-30 20:44:05,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534358109] [2023-08-30 20:44:05,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:44:05,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:44:05,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:44:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:44:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:44:06,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 352 [2023-08-30 20:44:06,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 650 transitions, 10117 flow. Second operand has 29 states, 29 states have (on average 120.48275862068965) internal successors, (3494), 29 states have internal predecessors, (3494), 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 20:44:06,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:44:06,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 352 [2023-08-30 20:44:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:44:10,675 INFO L130 PetriNetUnfolder]: 8945/15333 cut-off events. [2023-08-30 20:44:10,676 INFO L131 PetriNetUnfolder]: For 327183/327183 co-relation queries the response was YES. [2023-08-30 20:44:10,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134809 conditions, 15333 events. 8945/15333 cut-off events. For 327183/327183 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 113259 event pairs, 905 based on Foata normal form. 8/15341 useless extension candidates. Maximal degree in co-relation 134361. Up to 5096 conditions per place. [2023-08-30 20:44:10,809 INFO L137 encePairwiseOnDemand]: 338/352 looper letters, 767 selfloop transitions, 312 changer transitions 45/1124 dead transitions. [2023-08-30 20:44:10,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 1124 transitions, 20949 flow [2023-08-30 20:44:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:44:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:44:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2750 transitions. [2023-08-30 20:44:10,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35511363636363635 [2023-08-30 20:44:10,812 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2750 transitions. [2023-08-30 20:44:10,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2750 transitions. [2023-08-30 20:44:10,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:44:10,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2750 transitions. [2023-08-30 20:44:10,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 125.0) internal successors, (2750), 22 states have internal predecessors, (2750), 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 20:44:10,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 352.0) internal successors, (8096), 23 states have internal predecessors, (8096), 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 20:44:10,822 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 352.0) internal successors, (8096), 23 states have internal predecessors, (8096), 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 20:44:10,822 INFO L175 Difference]: Start difference. First operand has 191 places, 650 transitions, 10117 flow. Second operand 22 states and 2750 transitions. [2023-08-30 20:44:10,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 1124 transitions, 20949 flow [2023-08-30 20:44:12,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1124 transitions, 20600 flow, removed 127 selfloop flow, removed 3 redundant places. [2023-08-30 20:44:12,743 INFO L231 Difference]: Finished difference. Result has 221 places, 818 transitions, 14090 flow [2023-08-30 20:44:12,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=10021, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14090, PETRI_PLACES=221, PETRI_TRANSITIONS=818} [2023-08-30 20:44:12,743 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 196 predicate places. [2023-08-30 20:44:12,744 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 818 transitions, 14090 flow [2023-08-30 20:44:12,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 120.48275862068965) internal successors, (3494), 29 states have internal predecessors, (3494), 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 20:44:12,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:44:12,745 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:44:12,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:44:12,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:12,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:44:12,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:44:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1445197890, now seen corresponding path program 6 times [2023-08-30 20:44:12,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:44:12,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929788126] [2023-08-30 20:44:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:44:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:44:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:44:13,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:44:13,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929788126] [2023-08-30 20:44:13,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929788126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:44:13,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120620143] [2023-08-30 20:44:13,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:44:13,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:13,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:44:13,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:44:13,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:44:14,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:44:14,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:44:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 20:44:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:44:14,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:44:14,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:44:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:44:14,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:44:14,425 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-30 20:44:14,426 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 34 treesize of output 10 [2023-08-30 20:44:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:44:14,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:44:18,985 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* c_~i~0 4))) (.cse2 (* c_~end~0 4))) (and (or (not (= (mod c_~ok~0 256) 0)) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (= (select (select .cse0 c_~A~0.base) .cse1) (select (select .cse0 ~queue~0.base) (+ .cse2 ~queue~0.offset))))))) (forall ((v_ArrVal_405 (Array Int Int)) (~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_405))) (let ((.cse3 (select .cse4 ~queue~0.base))) (or (< c_~v_old~0 (+ (select .cse3 (+ (* c_~start~0 4) ~queue~0.offset)) 1)) (not (= (select (select .cse4 c_~A~0.base) .cse1) (select .cse3 (+ .cse2 ~queue~0.offset)))))))))) is different from false [2023-08-30 20:44:19,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:19,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1800 treesize of output 1680 [2023-08-30 20:44:19,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:19,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 792 treesize of output 771 [2023-08-30 20:44:19,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:19,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 690 treesize of output 623 [2023-08-30 20:44:19,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:19,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 582 treesize of output 503 [2023-08-30 20:44:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2023-08-30 20:44:33,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120620143] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:44:33,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:44:33,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 32 [2023-08-30 20:44:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97719069] [2023-08-30 20:44:33,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:44:33,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 20:44:33,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:44:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 20:44:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=889, Unknown=2, NotChecked=62, Total=1122 [2023-08-30 20:44:33,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 352 [2023-08-30 20:44:33,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 818 transitions, 14090 flow. Second operand has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 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 20:44:33,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:44:33,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 352 [2023-08-30 20:44:33,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:44:42,097 INFO L130 PetriNetUnfolder]: 10161/17447 cut-off events. [2023-08-30 20:44:42,097 INFO L131 PetriNetUnfolder]: For 432985/432985 co-relation queries the response was YES. [2023-08-30 20:44:42,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164884 conditions, 17447 events. 10161/17447 cut-off events. For 432985/432985 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 132836 event pairs, 928 based on Foata normal form. 12/17459 useless extension candidates. Maximal degree in co-relation 164750. Up to 5542 conditions per place. [2023-08-30 20:44:42,276 INFO L137 encePairwiseOnDemand]: 337/352 looper letters, 785 selfloop transitions, 453 changer transitions 66/1304 dead transitions. [2023-08-30 20:44:42,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1304 transitions, 25607 flow [2023-08-30 20:44:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 20:44:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 20:44:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2750 transitions. [2023-08-30 20:44:42,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.244140625 [2023-08-30 20:44:42,280 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2750 transitions. [2023-08-30 20:44:42,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2750 transitions. [2023-08-30 20:44:42,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:44:42,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2750 transitions. [2023-08-30 20:44:42,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 85.9375) internal successors, (2750), 32 states have internal predecessors, (2750), 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 20:44:42,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 352.0) internal successors, (11616), 33 states have internal predecessors, (11616), 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 20:44:42,288 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 352.0) internal successors, (11616), 33 states have internal predecessors, (11616), 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 20:44:42,289 INFO L175 Difference]: Start difference. First operand has 221 places, 818 transitions, 14090 flow. Second operand 32 states and 2750 transitions. [2023-08-30 20:44:42,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1304 transitions, 25607 flow [2023-08-30 20:44:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1304 transitions, 25187 flow, removed 161 selfloop flow, removed 8 redundant places. [2023-08-30 20:44:45,269 INFO L231 Difference]: Finished difference. Result has 258 places, 970 transitions, 18109 flow [2023-08-30 20:44:45,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=13745, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18109, PETRI_PLACES=258, PETRI_TRANSITIONS=970} [2023-08-30 20:44:45,269 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 233 predicate places. [2023-08-30 20:44:45,270 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 970 transitions, 18109 flow [2023-08-30 20:44:45,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.11764705882354) internal successors, (2792), 34 states have internal predecessors, (2792), 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 20:44:45,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:44:45,270 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:44:45,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 20:44:45,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:44:45,471 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:44:45,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:44:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash -316490610, now seen corresponding path program 7 times [2023-08-30 20:44:45,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:44:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264852624] [2023-08-30 20:44:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:44:45,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:44:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 20:44:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:44:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264852624] [2023-08-30 20:44:45,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264852624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:44:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659002374] [2023-08-30 20:44:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:44:45,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:44:45,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:44:45,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:44:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:44:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:44:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 20:44:45,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:44:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 20:44:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659002374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:44:45,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:44:45,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2023-08-30 20:44:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183245499] [2023-08-30 20:44:45,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:44:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:44:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:44:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:44:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:44:45,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 352 [2023-08-30 20:44:45,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 970 transitions, 18109 flow. Second operand has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 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 20:44:45,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:44:45,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 352 [2023-08-30 20:44:45,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:44:50,748 INFO L130 PetriNetUnfolder]: 10948/18762 cut-off events. [2023-08-30 20:44:50,748 INFO L131 PetriNetUnfolder]: For 567411/567411 co-relation queries the response was YES. [2023-08-30 20:44:50,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191443 conditions, 18762 events. 10948/18762 cut-off events. For 567411/567411 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 143393 event pairs, 809 based on Foata normal form. 104/18866 useless extension candidates. Maximal degree in co-relation 191312. Up to 7160 conditions per place. [2023-08-30 20:44:50,951 INFO L137 encePairwiseOnDemand]: 345/352 looper letters, 506 selfloop transitions, 769 changer transitions 0/1275 dead transitions. [2023-08-30 20:44:50,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1275 transitions, 26007 flow [2023-08-30 20:44:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:44:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:44:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1271 transitions. [2023-08-30 20:44:50,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513494318181818 [2023-08-30 20:44:50,954 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1271 transitions. [2023-08-30 20:44:50,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1271 transitions. [2023-08-30 20:44:50,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:44:50,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1271 transitions. [2023-08-30 20:44:50,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 158.875) internal successors, (1271), 8 states have internal predecessors, (1271), 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 20:44:50,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 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 20:44:50,957 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 352.0) internal successors, (3168), 9 states have internal predecessors, (3168), 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 20:44:50,957 INFO L175 Difference]: Start difference. First operand has 258 places, 970 transitions, 18109 flow. Second operand 8 states and 1271 transitions. [2023-08-30 20:44:50,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1275 transitions, 26007 flow [2023-08-30 20:44:54,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1275 transitions, 25025 flow, removed 165 selfloop flow, removed 12 redundant places. [2023-08-30 20:44:54,867 INFO L231 Difference]: Finished difference. Result has 257 places, 1158 transitions, 24291 flow [2023-08-30 20:44:54,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=17099, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24291, PETRI_PLACES=257, PETRI_TRANSITIONS=1158} [2023-08-30 20:44:54,868 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2023-08-30 20:44:54,868 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 1158 transitions, 24291 flow [2023-08-30 20:44:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.75) internal successors, (1238), 8 states have internal predecessors, (1238), 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 20:44:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:44:54,869 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:44:54,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:44:55,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:44:55,069 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:44:55,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:44:55,070 INFO L85 PathProgramCache]: Analyzing trace with hash -973037270, now seen corresponding path program 8 times [2023-08-30 20:44:55,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:44:55,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235524205] [2023-08-30 20:44:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:44:55,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:44:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:44:56,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:44:56,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235524205] [2023-08-30 20:44:56,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235524205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:44:56,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082927932] [2023-08-30 20:44:56,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:44:56,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:56,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:44:56,351 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:44:56,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:44:56,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:44:56,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:44:56,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 20:44:56,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:44:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:44:56,685 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 20:44:56,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2023-08-30 20:44:56,694 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 27 treesize of output 15 [2023-08-30 20:44:56,755 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 20:44:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:44:56,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:44:56,905 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_506 (Array Int Int))) (< c_~v_old~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_506) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) 1))) (not (= (mod c_~ok~0 256) 0))) is different from false [2023-08-30 20:44:56,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:56,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 135 [2023-08-30 20:44:57,002 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 42 treesize of output 36 [2023-08-30 20:44:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 20:44:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082927932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:44:57,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:44:57,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 33 [2023-08-30 20:44:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685624755] [2023-08-30 20:44:57,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:44:57,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:44:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:44:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:44:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=934, Unknown=1, NotChecked=64, Total=1190 [2023-08-30 20:44:59,191 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 20:45:01,265 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 20:45:01,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 352 [2023-08-30 20:45:01,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 1158 transitions, 24291 flow. Second operand has 35 states, 35 states have (on average 84.05714285714286) internal successors, (2942), 35 states have internal predecessors, (2942), 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 20:45:01,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:45:01,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 352 [2023-08-30 20:45:01,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:08,613 INFO L130 PetriNetUnfolder]: 11939/20466 cut-off events. [2023-08-30 20:45:08,613 INFO L131 PetriNetUnfolder]: For 653573/653573 co-relation queries the response was YES. [2023-08-30 20:45:08,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219792 conditions, 20466 events. 11939/20466 cut-off events. For 653573/653573 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 157522 event pairs, 542 based on Foata normal form. 11/20477 useless extension candidates. Maximal degree in co-relation 217088. Up to 6891 conditions per place. [2023-08-30 20:45:08,844 INFO L137 encePairwiseOnDemand]: 337/352 looper letters, 1013 selfloop transitions, 634 changer transitions 46/1693 dead transitions. [2023-08-30 20:45:08,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1693 transitions, 39145 flow [2023-08-30 20:45:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 20:45:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 20:45:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2209 transitions. [2023-08-30 20:45:08,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2510227272727273 [2023-08-30 20:45:08,846 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2209 transitions. [2023-08-30 20:45:08,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2209 transitions. [2023-08-30 20:45:08,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:08,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2209 transitions. [2023-08-30 20:45:08,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 88.36) internal successors, (2209), 25 states have internal predecessors, (2209), 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 20:45:08,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 352.0) internal successors, (9152), 26 states have internal predecessors, (9152), 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 20:45:08,854 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 352.0) internal successors, (9152), 26 states have internal predecessors, (9152), 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 20:45:08,854 INFO L175 Difference]: Start difference. First operand has 257 places, 1158 transitions, 24291 flow. Second operand 25 states and 2209 transitions. [2023-08-30 20:45:08,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1693 transitions, 39145 flow [2023-08-30 20:45:14,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1693 transitions, 37825 flow, removed 660 selfloop flow, removed 0 redundant places. [2023-08-30 20:45:14,721 INFO L231 Difference]: Finished difference. Result has 289 places, 1270 transitions, 27513 flow [2023-08-30 20:45:14,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=23617, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=27513, PETRI_PLACES=289, PETRI_TRANSITIONS=1270} [2023-08-30 20:45:14,721 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 264 predicate places. [2023-08-30 20:45:14,721 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 1270 transitions, 27513 flow [2023-08-30 20:45:14,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 84.05714285714286) internal successors, (2942), 35 states have internal predecessors, (2942), 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 20:45:14,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:14,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:45:14,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:45:14,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:45:14,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:45:14,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:14,927 INFO L85 PathProgramCache]: Analyzing trace with hash 951538752, now seen corresponding path program 9 times [2023-08-30 20:45:14,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:14,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304054030] [2023-08-30 20:45:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:14,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:45:15,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:15,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304054030] [2023-08-30 20:45:15,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304054030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:15,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334209301] [2023-08-30 20:45:15,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:45:15,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:15,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:15,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:45:15,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:45:15,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:45:15,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:45:15,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:45:15,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:45:15,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:45:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:45:15,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334209301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:45:15,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:45:15,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-08-30 20:45:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668785596] [2023-08-30 20:45:15,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:45:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:45:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:45:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:45:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:45:15,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 352 [2023-08-30 20:45:15,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1270 transitions, 27513 flow. Second operand has 14 states, 14 states have (on average 142.71428571428572) internal successors, (1998), 14 states have internal predecessors, (1998), 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 20:45:15,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:45:15,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 352 [2023-08-30 20:45:15,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:19,920 INFO L130 PetriNetUnfolder]: 7124/12794 cut-off events. [2023-08-30 20:45:19,920 INFO L131 PetriNetUnfolder]: For 414977/415146 co-relation queries the response was YES. [2023-08-30 20:45:20,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138249 conditions, 12794 events. 7124/12794 cut-off events. For 414977/415146 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 94649 event pairs, 796 based on Foata normal form. 431/13196 useless extension candidates. Maximal degree in co-relation 138095. Up to 7063 conditions per place. [2023-08-30 20:45:20,079 INFO L137 encePairwiseOnDemand]: 342/352 looper letters, 519 selfloop transitions, 48 changer transitions 671/1254 dead transitions. [2023-08-30 20:45:20,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1254 transitions, 28985 flow [2023-08-30 20:45:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:45:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:45:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3053 transitions. [2023-08-30 20:45:20,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41301406926406925 [2023-08-30 20:45:20,082 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3053 transitions. [2023-08-30 20:45:20,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3053 transitions. [2023-08-30 20:45:20,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:20,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3053 transitions. [2023-08-30 20:45:20,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 145.38095238095238) internal successors, (3053), 21 states have internal predecessors, (3053), 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 20:45:20,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 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 20:45:20,089 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 352.0) internal successors, (7744), 22 states have internal predecessors, (7744), 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 20:45:20,089 INFO L175 Difference]: Start difference. First operand has 289 places, 1270 transitions, 27513 flow. Second operand 21 states and 3053 transitions. [2023-08-30 20:45:20,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1254 transitions, 28985 flow [2023-08-30 20:45:22,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1254 transitions, 27997 flow, removed 281 selfloop flow, removed 24 redundant places. [2023-08-30 20:45:22,762 INFO L231 Difference]: Finished difference. Result has 275 places, 499 transitions, 10549 flow [2023-08-30 20:45:22,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=19995, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=905, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10549, PETRI_PLACES=275, PETRI_TRANSITIONS=499} [2023-08-30 20:45:22,763 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2023-08-30 20:45:22,763 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 499 transitions, 10549 flow [2023-08-30 20:45:22,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 142.71428571428572) internal successors, (1998), 14 states have internal predecessors, (1998), 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 20:45:22,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:45:22,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:45:22,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:45:22,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 20:45:22,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:45:22,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:45:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash 956078536, now seen corresponding path program 10 times [2023-08-30 20:45:22,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:45:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913214395] [2023-08-30 20:45:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:45:22,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:45:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:45:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:45:24,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:45:24,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913214395] [2023-08-30 20:45:24,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913214395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:45:24,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003884399] [2023-08-30 20:45:24,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:45:24,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:45:24,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:45:24,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:45:24,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:45:24,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:45:24,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:45:24,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-30 20:45:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:45:24,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:45:24,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:45:24,491 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 20:45:24,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 20:45:24,565 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 20:45:24,616 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:45:24,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 20:45:24,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 20:45:24,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 20:45:24,703 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 20:45:24,745 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 20:45:25,318 INFO L321 Elim1Store]: treesize reduction 37, result has 55.4 percent of original size [2023-08-30 20:45:25,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 61 [2023-08-30 20:45:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:45:25,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:45:27,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:27,189 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 250 treesize of output 166 [2023-08-30 20:45:27,301 INFO L321 Elim1Store]: treesize reduction 18, result has 87.4 percent of original size [2023-08-30 20:45:27,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 10799 treesize of output 10107 [2023-08-30 20:45:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:27,858 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:27,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 4971 treesize of output 3845 [2023-08-30 20:45:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:27,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:28,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:28,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 3669 treesize of output 3467 [2023-08-30 20:45:28,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:28,118 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:45:28,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:45:28,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 3384 treesize of output 2874 [2023-08-30 20:48:36,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:48:36,179 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 251 treesize of output 167 [2023-08-30 20:48:36,374 INFO L321 Elim1Store]: treesize reduction 13, result has 93.5 percent of original size [2023-08-30 20:48:36,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 224599 treesize of output 207626 [2023-08-30 20:48:37,068 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:48:37,072 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:48:37,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:48:37,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 3350 treesize of output 3285 [2023-08-30 20:48:37,194 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:48:37,201 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:48:37,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:48:37,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 3125 treesize of output 2835 [2023-08-30 20:48:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:48:37,364 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:48:37,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:48:37,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 2773 treesize of output 2033 [2023-08-30 20:54:33,321 WARN L222 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 1076 DAG size of output: 1210 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15